VOLTAGE REGULATOR CIRCUIT USING ZENER DIODE PDF



Voltage Regulator Circuit Using Zener Diode Pdf

Voltage Regulator Using Zener Diode Physics Astronomy. Jan 08, 2018 · Zener Diode as Voltage Regulator. This is arguably the most common application of zener diodes. This application of the zener diodes relies heavily on the ability of the zener diodes to maintain a constant voltage irrespective of variations in supply or load current. a double zener clipping circuit is used. The circuit diagram for the, Zener Diode A Zener diode is designed to operate in the breakdown mode. (l k ) t ID (A) V (V) reverse (leakage) current forward current breakdown voltage VBD D R t vs(t) >15V for all t integrated iit + v (t) + v (t) EE40 Fall 2009 Prof. CheungSlide 10 circuit VBD = 15V s – o –.

Voltage Regulator Discrete Semiconductor Circuits

Voltage Regulator Using Zener Diode Physics Astronomy. Objective:A voltage regulator is a circuit used to maintain a constant output voltage at a load independent of changes in the load current. For example, the load could be a microcontroller-based system that requires a constant supply voltage even as its demand for current varies with system activity. The Zener diode regulator in Figure 1 offers a v, In Fig. 8 we have a Zener diode regulator for a negative polarity power supply. The NPN transistor was replaced with a PNP transistor, and the polarity of the Zener diode and 100uF capacitor were reversed. All current flows were also revered. That completes this introduction to ….

The circuit diagram of a voltage regulator using a Zener diode is shown: The value of the series resistor is written as RS = (VL − VZ)IL Current through the diode increases when the voltage across the diode tends to increase which results in the voltage drop across the resistor. Sep 20, 2017 · A Zener Diode makes for a lousy voltage regulator, but an excellent voltage reference. The lesson here is that if you want to use a Zener diode regulator circuit, you need to reconsider your design. In some very rare or corner cases, it will work fine. 27 thoughts on “ Zener diode makes for a lousy regulator ” Peet says: August 21

Jan 11, 2019 · In this video, the examples based on the Zener diode circuit have been solved. The examples are related to the Zener diode voltage regulator circuits. And in … The voltage across load resistor R L is equal to the Zener breakdown voltage V ZK—regardless of the value of load resistor R L or source voltage V S (provided, of course, that the Zener diode is in breakdown)! This is an example of a primary application of Zener diodes— voltage regulation. We call this particular regulator circuit the shunt

ZENER DIODE Definition A Zener diode is a type of diode that permits current to flow in the forward direction like a normal diode, but also in the reverse direction if the voltage is larger than the breakdown voltage known as Zener knee voltage or Zener voltage. Basics Current-voltage characteristic of a Zener diode with a breakdown voltage of 17 volt. Zener diodes are simple and useful devices for building voltage regulator circuits, but are times when you may have to improvise in the absence of the proper zener diode. Explain how normal diodes might be used as crude substitutes for a zener diode in the following circuit: Rload Rseries Vsource file …

The major application of a Zener diodes in the electronic circuit is as a Voltage Regulator. It provides a constant voltage to the load from a source whose voltage may vary over a sufficient range. The figure below shows the circuit arrangement of Zener diode as a regulator. The major application of a Zener diodes in the electronic circuit is as a Voltage Regulator. It provides a constant voltage to the load from a source whose voltage may vary over a sufficient range. The figure below shows the circuit arrangement of Zener diode as a regulator.

Whatever excess voltage is supplied by the power source becomes dropped across the series resistor. However, it is important to note that a zener diode cannot make up for a deficiency in source voltage. For instance, this 12-volt zener diode does not drop 12 volts when the power source is only 6 volts strong. It is helpful to think of a zener Description TL431 Adjustable Zener. TL431A (TO-92) is an Adjustable Precision Zener (Shunt Regulator). It’s output voltage can be set to any value between 2.5V and 36V with the use of two external resistors – acting as a voltage divider (or alternatively a single trim-pot can be used instead) With a very sharp turn-on characteristics, the TL431 is an excellent alternative to zener diodes

Voltage Regulator Discrete Semiconductor Circuits. Regulator - Zener diode regulator For low current power supplies - a simple voltage regulator can be made with a resistor and a zener diode connected in reverse. Zener diodes are rated by their breakdown voltage V z and maximum power P z (typically 400mW or 1.3W), Oct 15, 2017 · To meet the large load variations zener diode with huge power rating should be used. It will be expensive. Transistor Based Voltage Regulator: Circuit # 1. The below circuit shows the voltage regulator using transistor. Comparing with the zener voltage regulator, it will provide better regulation. This circuit provides the voltage regulation.

Voltage RegulatorsCircuitsTypesWorking principle

Voltage regulator circuit using zener diode pdf

Voltage RegulatorsCircuitsTypesWorking principle. The following data must be known in order to design a voltage regulator using a Zener diode. VZ The desired regulated voltage rounded to the closest available Zener diode standard voltage. VINmin The minimum value of the applied input voltage. This must be higher than VZ, preferably at …, The following data must be known in order to design a voltage regulator using a Zener diode. VZ The desired regulated voltage rounded to the closest available Zener diode standard voltage. VINmin The minimum value of the applied input voltage. This must be higher than VZ, preferably at ….

Applications of Zener Diode Electrical4U. Jan 11, 2019 · In this video, the examples based on the Zener diode circuit have been solved. The examples are related to the Zener diode voltage regulator circuits. And in …, The major application of a Zener diodes in the electronic circuit is as a Voltage Regulator. It provides a constant voltage to the load from a source whose voltage may vary over a sufficient range. The figure below shows the circuit arrangement of Zener diode as a regulator..

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Voltage regulator circuit using zener diode pdf

Zener diode as a voltage Regulator SlideShare. Whatever excess voltage is supplied by the power source becomes dropped across the series resistor. However, it is important to note that a zener diode cannot make up for a deficiency in source voltage. For instance, this 12-volt zener diode does not drop 12 volts when the power source is only 6 volts strong. It is helpful to think of a zener ZENER DIODE THEORY INTRODUCTION The zener diode is a semiconductor device unique in its mode of operation and completely unreplaceable by any other electronic device. Because of its unusual properties it fills a long-standing need in electronic circuitry. It provides, among other useful functions, a constant voltage reference.

Voltage regulator circuit using zener diode pdf

  • Zener as a voltage regulator YouTube
  • The Zener Diode Working Principles and its Various

  • May 01, 2017 · A zener diode is very useful when you have a load that needs a steady voltage. This video walks through how to do just that as well as calculate currents. Section B9: Zener Diodes When we first talked about practical diodes, it was mentioned that a parameter associated with the diode in the reverse bias region was the breakdown voltage, V BR, also known as the peak-inverse voltage (PIV). This was a bad thing before – the whole avalanche breakdown, large current,

    Jun 08, 2019 · The main application of this type of diodes are as voltage regulator. Over voltage protector, as voltage reference. We will discussed what is the application of zener diode as voltage regulator, now we will discuss the other two points briefly. Overvoltage protection is done by using Zener diodes because there is current flowing through the Sep 20, 2017 · A Zener Diode makes for a lousy voltage regulator, but an excellent voltage reference. The lesson here is that if you want to use a Zener diode regulator circuit, you need to reconsider your design. In some very rare or corner cases, it will work fine. 27 thoughts on “ Zener diode makes for a lousy regulator ” Peet says: August 21

    Dec 09, 2012 · Zener diode regulator is a basic electronic circuit which is very useful for those interested in hobby circuits. This circuit is used for obtaining a regulated voltage at the output which can be used for biasing other circuit elements. 3. Zener Diode as a voltage clamper In a circuit involving AC input source, different from the normal PN diode clamping circuit, a Zener diode can also be used. The diode can be used to limit the peak of the output voltage to zener voltage at one side and to about 0V at other side of the sinusoidal waveform.

    Voltage Regulator Using Zener Diode Physics Astronomy Project Topics, Physics Science Fair Projects, Pyhsical Science, Astrology, Planets Solar Experiments for Kids and also Organics Physics Science ideas for CBSE, ICSE, GCSE, Middleschool, Elementary School for 5th, 6th, 7th, 8th, 9th and High School Students for the year 2016. ZENER DIODE THEORY INTRODUCTION The zener diode is a semiconductor device unique in its mode of operation and completely unreplaceable by any other electronic device. Because of its unusual properties it fills a long-standing need in electronic circuitry. It provides, among other useful functions, a constant voltage reference

    Aug 26, 2015 · This can be done with a simple circuit using a resistor, Zener diode, and transistor. Zener diode basics. A Zener diode is designed to operate in reverse bias, clamping the voltage across its terminals to the Zener voltage. The Zener voltage is the voltage at which the Zener diode conducts current when reverse biased. The major application of a Zener diodes in the electronic circuit is as a Voltage Regulator. It provides a constant voltage to the load from a source whose voltage may vary over a sufficient range. The figure below shows the circuit arrangement of Zener diode as a regulator.

    The Zener Diode: Practice Problems In a Zener diode voltage regulator circuit,the source series resistance Rs 20 ohm .Zener voltage Vz=18 volt.and lode resistance Rl=200 ohm.If source voltage Vs can vary from 20 volt to 30 volt ,find the maximum and minimum current in the diode? 0 Comments. Series Voltage Regulator: series pass regulator Basic series regulator using a zener diode and emitter follower . The simple emitter follower series voltage regulator circuit directly compared the output with the voltage reference. In this way the output voltage was equal to that of the reference, neglecting the base emitter voltage drop.

    Voltage regulator circuit using zener diode pdf

    The voltage across load resistor R L is equal to the Zener breakdown voltage V ZK—regardless of the value of load resistor R L or source voltage V S (provided, of course, that the Zener diode is in breakdown)! This is an example of a primary application of Zener diodes— voltage regulation. We call this particular regulator circuit the shunt This simple Zener diode circuit is widely used as an easy method of providing a voltage reference. Zener diode circuit for PSU with series transistor. The very simple Zener diode circuit providing the shunt regulator function as shown above is not particularly efficient and is not practicable for many higher current applications.

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    Voltage regulator circuit using zener diode pdf

    voltage regulators zeners kennethkuhn.com. Oct 15, 2017 · To meet the large load variations zener diode with huge power rating should be used. It will be expensive. Transistor Based Voltage Regulator: Circuit # 1. The below circuit shows the voltage regulator using transistor. Comparing with the zener voltage regulator, it will provide better regulation. This circuit provides the voltage regulation, Voltage Regulator Using Zener Diode Physics Astronomy Project Topics, Physics Science Fair Projects, Pyhsical Science, Astrology, Planets Solar Experiments for Kids and also Organics Physics Science ideas for CBSE, ICSE, GCSE, Middleschool, Elementary School for 5th, 6th, 7th, 8th, 9th and High School Students for the year 2016..

    Zener Diode Voltage Regulator Electronics Post

    Diode Circuits MIT OpenCourseWare. A simple voltage regulator by Zener diode circuit: When you are using Zener diode in regulator circuit, it necessarily has the limited current entering into it. If a faultless source of voltage was applied to it, it will pass too much current as soon as reaches breakdown-voltage. To overwhelm this, a current source must drive the ZenerDiode., In Fig. 8 we have a Zener diode regulator for a negative polarity power supply. The NPN transistor was replaced with a PNP transistor, and the polarity of the Zener diode and 100uF capacitor were reversed. All current flows were also revered. That completes this introduction to ….

    Sep 20, 2017 · A Zener Diode makes for a lousy voltage regulator, but an excellent voltage reference. The lesson here is that if you want to use a Zener diode regulator circuit, you need to reconsider your design. In some very rare or corner cases, it will work fine. 27 thoughts on “ Zener diode makes for a lousy regulator ” Peet says: August 21 Sep 30, 2015 · Advantage of Transistor Series Voltage Regulator. The advantage of this circuit is that the changes in zener current are reduced by a factor ß. Hence, the effect of zener impedance is tremendously reduced and we get a more stabilised output. Disadvantage of Transistor Series Voltage Regulator

    circuit. The Zener diode has a unique property that offers a simple, low-cost solution to this problem. This application note discusses the implementation of this voltage regulator and its advantages and drawbacks. Keywords: Zener diode, Circuit, Voltage regulator, Digital, Mixed Signal Introduction Description TL431 Adjustable Zener. TL431A (TO-92) is an Adjustable Precision Zener (Shunt Regulator). It’s output voltage can be set to any value between 2.5V and 36V with the use of two external resistors – acting as a voltage divider (or alternatively a single trim-pot can be used instead) With a very sharp turn-on characteristics, the TL431 is an excellent alternative to zener diodes

    Description TL431 Adjustable Zener. TL431A (TO-92) is an Adjustable Precision Zener (Shunt Regulator). It’s output voltage can be set to any value between 2.5V and 36V with the use of two external resistors – acting as a voltage divider (or alternatively a single trim-pot can be used instead) With a very sharp turn-on characteristics, the TL431 is an excellent alternative to zener diodes Objective:A voltage regulator is a circuit used to maintain a constant output voltage at a load independent of changes in the load current. For example, the load could be a microcontroller-based system that requires a constant supply voltage even as its demand for current varies with system activity. The Zener diode regulator in Figure 1 offers a v

    Oct 17, 2018 · Zener diode voltage regulator circuit using op-amp. The op-amp voltage regulator circuit consists of a non-inverting amplifier with a fixed reference voltage at the non-inverting input. The negative feedback taken from the output is connected to the inverting pin of the op-amp through a voltage divider. Series Voltage Regulator: series pass regulator Basic series regulator using a zener diode and emitter follower . The simple emitter follower series voltage regulator circuit directly compared the output with the voltage reference. In this way the output voltage was equal to that of the reference, neglecting the base emitter voltage drop.

    AIM To design and set up a voltage regulator using Zener diode COMPONENTS AND EQUIPMENTS 1. Bridge rectifier circuit 2. Zener diode (6.2 volt) 3. Resistors 4. Capacitors 5. Voltmeter 6. Ammeter 7. Rheostat CIRCUIT DIAGRAM DESIGN To get a 5.6 V as output, select SZ 5.6 as Zener diode .Take load current as 5 mA. Load current =output voltage\output current = 5.6/5 mA = 1.1 K (use 1.2 K) R1 is ZENER DIODE THEORY INTRODUCTION The zener diode is a semiconductor device unique in its mode of operation and completely unreplaceable by any other electronic device. Because of its unusual properties it fills a long-standing need in electronic circuitry. It provides, among other useful functions, a constant voltage reference

    Oct 15, 2017 · To meet the large load variations zener diode with huge power rating should be used. It will be expensive. Transistor Based Voltage Regulator: Circuit # 1. The below circuit shows the voltage regulator using transistor. Comparing with the zener voltage regulator, it will provide better regulation. This circuit provides the voltage regulation Section B9: Zener Diodes When we first talked about practical diodes, it was mentioned that a parameter associated with the diode in the reverse bias region was the breakdown voltage, V BR, also known as the peak-inverse voltage (PIV). This was a bad thing before – the whole avalanche breakdown, large current,

    Zener diode voltage regulator circuit. This zener diode voltage regulator circuit uses a Zener diode to establish a reference voltage. This semiconductor is manufactured in a wide variety of voltages and powers. Zener diodes have voltage values from less than 2 volts to several hundred volts and they can dissipate power ranging from 0.25 to 50 watts… or more. circuit. The Zener diode has a unique property that offers a simple, low-cost solution to this problem. This application note discusses the implementation of this voltage regulator and its advantages and drawbacks. Keywords: Zener diode, Circuit, Voltage regulator, Digital, Mixed Signal Introduction

    Description TL431 Adjustable Zener. TL431A (TO-92) is an Adjustable Precision Zener (Shunt Regulator). It’s output voltage can be set to any value between 2.5V and 36V with the use of two external resistors – acting as a voltage divider (or alternatively a single trim-pot can be used instead) With a very sharp turn-on characteristics, the TL431 is an excellent alternative to zener diodes May 10, 2016 · Career Point Cares Hence with the help above given facts and the simulation on proteous software correctly it is clear that above circuit for working of zener diode as a voltage regulator is fully correct and is working properly.

    The circuit diagram of a voltage regulator using a Zener diode is shown: The value of the series resistor is written as RS = (VL − VZ)IL Current through the diode increases when the voltage across the diode tends to increase which results in the voltage drop across the resistor. Description TL431 Adjustable Zener. TL431A (TO-92) is an Adjustable Precision Zener (Shunt Regulator). It’s output voltage can be set to any value between 2.5V and 36V with the use of two external resistors – acting as a voltage divider (or alternatively a single trim-pot can be used instead) With a very sharp turn-on characteristics, the TL431 is an excellent alternative to zener diodes

    Series Voltage Regulator Series Pass В» Electronics Notes

    Voltage regulator circuit using zener diode pdf

    Zener Diode as Voltage Regulator Circuits & Theory. Whatever excess voltage is supplied by the power source becomes dropped across the series resistor. However, it is important to note that a zener diode cannot make up for a deficiency in source voltage. For instance, this 12-volt zener diode does not drop 12 volts when the power source is only 6 volts strong. It is helpful to think of a zener, Oct 01, 2015 · Zener Diode Voltage Regulator. The zener diode voltage regulator is based on a particular characteristic of zener diodes. When the zener diode is operated in the breakdown or zener region, the voltage across it is substantially constant for a large change of current through it..

    The Zener Diode Working Principles and its Various. A simple voltage regulator by Zener diode circuit: When you are using Zener diode in regulator circuit, it necessarily has the limited current entering into it. If a faultless source of voltage was applied to it, it will pass too much current as soon as reaches breakdown-voltage. To overwhelm this, a current source must drive the ZenerDiode., Aug 26, 2015 · This can be done with a simple circuit using a resistor, Zener diode, and transistor. Zener diode basics. A Zener diode is designed to operate in reverse bias, clamping the voltage across its terminals to the Zener voltage. The Zener voltage is the voltage at which the Zener diode conducts current when reverse biased..

    Zener diode Voltage regulator Circuit Design Diagram

    Voltage regulator circuit using zener diode pdf

    Zener Diode as a Voltage Regulator Working Principles. Zener Controlled Transistor Shunt Voltage Regulator The image below shows the circuit diagram of a shunt voltage regulator. The circuit consists of an NPN transistor and a zener diode along with a series resistor Rseries that is connected in series with the input supply. The zener diode is … Jun 08, 2019 · The main application of this type of diodes are as voltage regulator. Over voltage protector, as voltage reference. We will discussed what is the application of zener diode as voltage regulator, now we will discuss the other two points briefly. Overvoltage protection is done by using Zener diodes because there is current flowing through the.

    Voltage regulator circuit using zener diode pdf

  • EXPERIMENT-1 AIM 1. To study zener diode as voltage
  • Transistor-Zener Diode Regulator Circuits
  • Zener Diode as Voltage Regulator Electrical4U

  • ZENER DIODE THEORY INTRODUCTION The zener diode is a semiconductor device unique in its mode of operation and completely unreplaceable by any other electronic device. Because of its unusual properties it fills a long-standing need in electronic circuitry. It provides, among other useful functions, a constant voltage reference Dec 14, 2012 · Zener Diode is a general purpose diode, which behaves like a normal diode when forward biased. But when it is reverse biased above a certain voltage known as zener breakdown voltage or zener voltage or avalanche point or zener knee voltage the voltage remains constant for …

    The circuit diagram of a voltage regulator using a Zener diode is shown: The value of the series resistor is written as RS = (VL − VZ)IL Current through the diode increases when the voltage across the diode tends to increase which results in the voltage drop across the resistor. Jan 02, 2019 · The exciting part of this diode is that we can choose the Zener diode with a suitable breakdown voltage to work as a voltage regulator in our circuit. For example, we want that the voltage across a load in our circuit does not exceed, let’s say, 12 volts.

    Jul 27, 2018 · Zener Voltage Regulator Circuit Here, we have designed a Zener Voltage Regulator using 5.1V of Zener diode. The Zener diode works as the sensing element. When the supply voltage exceeds its breakdown voltage, its start conducting in reverse direction and maintains the same voltage across it and flow back the extra current, thus provide the Jan 02, 2019 · The exciting part of this diode is that we can choose the Zener diode with a suitable breakdown voltage to work as a voltage regulator in our circuit. For example, we want that the voltage across a load in our circuit does not exceed, let’s say, 12 volts.

    Zener Diode A Zener diode is designed to operate in the breakdown mode. (l k ) t ID (A) V (V) reverse (leakage) current forward current breakdown voltage VBD D R t vs(t) >15V for all t integrated iit + v (t) + v (t) EE40 Fall 2009 Prof. CheungSlide 10 circuit VBD = 15V s – o – Whatever excess voltage is supplied by the power source becomes dropped across the series resistor. However, it is important to note that a zener diode cannot make up for a deficiency in source voltage. For instance, this 12-volt zener diode does not drop 12 volts when the power source is only 6 volts strong. It is helpful to think of a zener

    The voltage across load resistor R L is equal to the Zener breakdown voltage V ZK—regardless of the value of load resistor R L or source voltage V S (provided, of course, that the Zener diode is in breakdown)! This is an example of a primary application of Zener diodes— voltage regulation. We call this particular regulator circuit the shunt ZENER DIODE Definition A Zener diode is a type of diode that permits current to flow in the forward direction like a normal diode, but also in the reverse direction if the voltage is larger than the breakdown voltage known as Zener knee voltage or Zener voltage. Basics Current-voltage characteristic of a Zener diode with a breakdown voltage of 17 volt.

    Jan 08, 2018 · Zener Diode as Voltage Regulator. This is arguably the most common application of zener diodes. This application of the zener diodes relies heavily on the ability of the zener diodes to maintain a constant voltage irrespective of variations in supply or load current. a double zener clipping circuit is used. The circuit diagram for the Dec 09, 2012 · Zener diode regulator is a basic electronic circuit which is very useful for those interested in hobby circuits. This circuit is used for obtaining a regulated voltage at the output which can be used for biasing other circuit elements.

    AIM To design and set up a voltage regulator using Zener diode COMPONENTS AND EQUIPMENTS 1. Bridge rectifier circuit 2. Zener diode (6.2 volt) 3. Resistors 4. Capacitors 5. Voltmeter 6. Ammeter 7. Rheostat CIRCUIT DIAGRAM DESIGN To get a 5.6 V as output, select SZ 5.6 as Zener diode .Take load current as 5 mA. Load current =output voltage\output current = 5.6/5 mA = 1.1 K (use 1.2 K) R1 is To study zener diode as voltage regulator 2. To calculate % line regulation 3. To calculate % load regulation APPARATUS: Zener diode, Resistors, Power supply, Multi meter CIRCUIT DIAGRAM: THEORY: Zener diode is a P-N junction diode specially designed to operate in the reverse biased mode. It is acting as normal diode while forward biasing.

    Figure 8. LED diode circuit. By using an LED and a Zener diode we can create a circuit which gives turns on the LED when a voltage exceeds a certain value. Consider the circuit shown on Figure 9. The LED will turn on when the voltage Vs becomes greater than Vz +Vg Vs R I … Zener Diode A Zener diode is designed to operate in the breakdown mode. (l k ) t ID (A) V (V) reverse (leakage) current forward current breakdown voltage VBD D R t vs(t) >15V for all t integrated iit + v (t) + v (t) EE40 Fall 2009 Prof. CheungSlide 10 circuit VBD = 15V s – o –

    Jan 11, 2019 · In this video, the examples based on the Zener diode circuit have been solved. The examples are related to the Zener diode voltage regulator circuits. And in … Dec 09, 2012 · Zener diode regulator is a basic electronic circuit which is very useful for those interested in hobby circuits. This circuit is used for obtaining a regulated voltage at the output which can be used for biasing other circuit elements.

    A simple voltage regulator by Zener diode circuit: When you are using Zener diode in regulator circuit, it necessarily has the limited current entering into it. If a faultless source of voltage was applied to it, it will pass too much current as soon as reaches breakdown-voltage. To overwhelm this, a current source must drive the ZenerDiode. Sep 25, 2019 · In the circuit above shows a simple series voltage regulator using a transistor and Zener diode. ‘Keep reading: Small Zener diode voltage regulator circuit with PCB’ » This circuit has a low pass filter. Which it is a special circuit that includes C1, R1, and C2. They help us to remove AC ripple. The voltage across C2 is a very stable

    The voltage across load resistor R L is equal to the Zener breakdown voltage V ZK—regardless of the value of load resistor R L or source voltage V S (provided, of course, that the Zener diode is in breakdown)! This is an example of a primary application of Zener diodes— voltage regulation. We call this particular regulator circuit the shunt The voltage across load resistor R L is equal to the Zener breakdown voltage V ZK—regardless of the value of load resistor R L or source voltage V S (provided, of course, that the Zener diode is in breakdown)! This is an example of a primary application of Zener diodes— voltage regulation. We call this particular regulator circuit the shunt

    Jan 11, 2019 · In this video, the examples based on the Zener diode circuit have been solved. The examples are related to the Zener diode voltage regulator circuits. And in … Aug 26, 2015 · This can be done with a simple circuit using a resistor, Zener diode, and transistor. Zener diode basics. A Zener diode is designed to operate in reverse bias, clamping the voltage across its terminals to the Zener voltage. The Zener voltage is the voltage at which the Zener diode conducts current when reverse biased.