Get AB33 Transistor Shunt Voltage Regulator Operating.pdf

Circuit Design of Transistor Series Voltage Regulator The following circuit can be built with a transistor as well as a Zener diode. In this circuit, the load current flows through the Q1 series transistor. So this is the reason to call this regulator a transistor-series-voltage-regulator.

The transistor shunt voltage regulator , regulates voltage by shunting current away from the load to regulate the output voltage. The circuit diagram of a shunt voltage regulator is shown below. If the load resistance decreases, the current through base of transistor decreases.

The NPN is configured as an emitter follower and basically this means if you set a certain voltage on the base (using the low power zener), the voltage on the emitter will be between 0.5V and 1V lower on the emitter across a large range of load resistances.

In reality, we need a non-zero forward voltage drop (abbreviated either Vth, Vγ, or Vd) from base to emitter (VBE) to "turn on" the transistor. Usually this voltage is usually around 0.6V.

The shunt regulator or shunt voltage regulator is a form of voltage regulator where the regulating element shunts the current to ground. The shunt regulator operates by maintaining a constant voltage across its terminals and it takes up the surplus current to maintain the voltage across the load.

3:03 9:15 Voltage Regulator using Transistor - YouTube YouTube Start of suggested clip End of suggested clip Through which the load current will flow. And that's the reason why we call this as a series voltageMoreThrough which the load current will flow. And that's the reason why we call this as a series voltage regulator. Here if we provide unregulated dc supply to the input terminals.

voltage regulators are different from transistors in design although a Transistor can be used to regulate voltage when comnbined with resistors and capacitors. Regulators give a constant output voltage in a circuit and nothing more while transistors act as switches.

The crucial difference between shunt and series voltage regulator is that in the shunt voltage regulator, the control element is in parallel connection with the load. On the contrary, in the series voltage regulator, the control element is serially connected to the load.