#TRANSISTOR SCHEMATIC SERIES#

Fundamentally, the transistor voltage regulators which are controlled by Zener are classified into two types namely series voltage regulators and shunt voltage regulators.

Beneath these conditions, a transistor-like Zener controlled is used frequently to maintain o/p voltage stable. The transistor then allows current to flow from the +9 volts to the 0vs, and the lamp comes on. When the switch is pressed a current passes through the resistor into the base of the transistor. Anyway the most common application we see in our day to day life is the usage of transistor as an audio amplifier. Transistors amplifiers are commonly used in applications like RF (radio frequency), audio, OFC (optic fibre communication) etc. Thus, the Zener RPS ( regulated power supply)efficiency turns into extremely low as the load current is high. The circuit shown in diagram B is based on an NPN transistor. An amplifier circuit which is purely based on a transistor or transistors is called a transistor amplifier. It is not simple to modify the o/p voltage because no such resources are provided.This occurs due to both VZ & VBE reduce by the rise in room temperature. These can be arranged as either NPN or PNP transistor and the circuit symbol (as well as the functionality) changes according to the layer arrangement: Bipolar junction transistors The horizontal terminal is called the base, the diagonal terminal without an arrow is the collector, and the diagonal terminal with an arrow is the emitter. The adjustments within Zener current are decreased to a significant amount the amount produced is not completely stable.The series voltage regulator disadvantages are listed below.

This eight-part series focuses on basic transistor theory, characteristics, and presents a wide range of practical bipolar transistor application circuits. Therefore, the Zener impedance effect will be decreased extremely & we can get an additional stabilized output. The bipolar transistor is the most important active circuit element used in modern electronics, and it forms the basis of most linear and digital ICs and op-amps, etc. The main benefit of this voltage regulator circuit is, the changes within Zener current are decreased through a factor ‘ß’.For instance, if Zener voltage is 8V, the transistor’s base voltage will stay approximately 8V. The transistor series voltage regulator working is when the voltage at the transistor’s base voltage is held to the stable voltage across the diode. transistor-series-voltage-regulator-circuit-diagram Here Zener diode provides the reference voltage. When the unregulated DC supply is given to the input terminals of the circuit then we can get the regulated output across the load. So this is the reason to call this regulator a transistor-series-voltage-regulator. From the circuit diagram of the n-p-n transistor, it is seen that the emitter-base circuit is forward biased while the collector-emitter circuit is reverse. In this circuit, the load current flows through the Q1 series transistor. The following circuit can be built with a transistor as well as a Zener diode. This voltage regulator circuit design is shown below. Circuit Design of Transistor Series Voltage Regulator The series voltage regulator can be defined as a regulator which has the limitations like high dissipation, less efficient, and the transistor voltage and Zener diode voltages are affected once the temperature rises. What is a Transistor Series Voltage Regulator?

Transistor schematic