DC Voltage Regulator Circuit
DC Voltage Regulator
A DC Voltage Regulator is a device which maintains the output voltage of an ordinary power supply constant irrespective of load variations or changes in input a.c. voltage .
Generally, electronic circuits using tubes or transistors require a source of d.c. power. However, batteries are rarely used for this purpose as they are costly and require frequent replacement. So, in practice, d.c. power for electronic circuits is most conveniently obtained from commercial a.c. lines by using rectifier-filter system, called a d.c. power supply.
The d.c. voltage from an ordinary power supply remains constant so long as a.c. mains voltage or load is unaltered. However, in many electronic applications, it is desired that d.c. voltage should remain constant irrespective of changes in a.c. mains or load. For this a dc voltage regulator is used.
Types of DC Voltage Regulators
A dc voltage regulator generally employs electronic devices to achieve this objective. The various types of dc voltage regulators are :
- Zener Diode Voltage Regulator
- Transistor Series Voltage Regulator
- Series Feedback Voltage Regulator
- Transistor Shunt Voltage Regulator
- Shunt Feedback Voltage Regulator
- Glow Tube Voltage Regulator
- Series Triode Voltage Regulator
- Series Double Triode Voltage Regulator
- IC Voltage Regulator
DC Voltage Regulator for Low Voltages
For low d.c. output voltages (upto 50V), either zener diode alone or zener in conjunction with transistor is used. Such supplies are called transistorised power supplies. A transistor power supply can give only low stabilised voltages because the safe value of VCE is about 50 V and if it is increased above this value, the breakdown of the junction may occur.
DC Voltage Regulator for High Voltages
For voltages greater than 50 V, glow tubes are used in conjunction with vacuum tube amplifiers. Such supplies are generally called tube power supplies and are extensively used for the proper operation of vacuum valves.
DC Voltage Regulator Circuit Diagram
Zener Diode Voltage Regulator Circuit Diagram
Transistor Series Voltage Regulator Circuit Diagram
Series Feedback Voltage Regulator Circuit Diagram
Transistor Shunt Voltage Regulator Circuit Diagram
Shunt Feedback Voltage Regulator Circuit Diagram
Glow Tube Voltage Regulator Circuit Diagram
Series Triode Voltage Regulator Circuit Diagram
Series Double Triode Voltage Regulator Circuit Diagram
IC Voltage Regulator Circuit Diagram
There are basically four types of IC voltage regulators & hence I will show you the circuit diagram of each one of these separately.
Fixed Positive Voltage Regulator Circuit Diagram
Fixed Negative Voltage Regulator Circuit Diagram
Adjustable Voltage Regulator Circuit Diagram
Dual Tracking Voltage Regulator Circuit Diagram
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- Regulated DC Power Supply
- DC Voltage Regulator Circuit
- Zener Diode Voltage Regulator
- Transistor Series Voltage Regulator
- Series Feedback Voltage Regulator
- Transistor Shunt Voltage Regulator
- Shunt Feedback Voltage Regulator
- Glow Tube Voltage Regulator
- Series Triode Voltage Regulator
- Series Double Triode Voltage Regulator
- IC Voltage Regulator
