Transistor Basic Voltage Regulator Circuit
The transistors series voltage regulator circuit is shown in the picture. And, the picture (a) is equivalent circuit. The VT1 is adjustment transistor which is used to adjust the output voltage. The VT1 and load RL are in series. So this circuit is called the series voltage regulator circuit. Because the adjustment tube is using the transistors, the transistor series voltage regulator circuit could work under a big working current which could overcome the weakness that the zener diode regulator circuits output current is limited by the zener diode limiting current. The picture (b) is the practical series voltage regulator circuit. The picture (c) is its diagram circuit.
