Darlington Transistor Amplifier Circuit Diagram

By | May 28, 2023

Darlington Transistor Amplifier Circuit Diagram

The Darlington transistor amplifier circuit is a type of transistor amplifier that uses two transistors in a common-emitter configuration. The first transistor, called the "driver transistor", provides the input signal to the second transistor, called the "output transistor". The output transistor is biased in saturation, so that it provides a large amount of current gain. The driver transistor is biased in a way that causes it to saturate when the input signal is high. This causes the output transistor to also saturate, which results in a large increase in the output current. The Darlington transistor amplifier circuit is a very powerful amplifier, and it can be used to drive a wide variety of loads. However, it is also a very inefficient amplifier, and it can dissipate a lot of heat. For this reason, the Darlington transistor amplifier circuit is typically only used in applications where high power output is required.

Circuit Diagram

The following diagram shows the circuit diagram of a Darlington transistor amplifier:

Components

The following components are required to build a Darlington transistor amplifier circuit: * Two NPN transistors * Two resistors * A capacitor * A power supply

Wiring

The following steps show how to wire a Darlington transistor amplifier circuit: 1. Connect the positive terminal of the power supply to the collector of the output transistor. 2. Connect the negative terminal of the power supply to the emitter of the output transistor. 3. Connect the base of the output transistor to the collector of the driver transistor. 4. Connect the emitter of the driver transistor to the base of the output transistor. 5. Connect a resistor between the base of the driver transistor and the positive terminal of the power supply. 6. Connect a capacitor between the collector of the output transistor and the ground.

Operation

When a positive voltage is applied to the base of the driver transistor, it will turn on and conduct current. This will cause the collector of the driver transistor to become more positive, which will in turn cause the base of the output transistor to become more positive. This will cause the output transistor to turn on and conduct current, which will result in a large increase in the output current. The Darlington transistor amplifier circuit is a very powerful amplifier, and it can be used to drive a wide variety of loads. However, it is also a very inefficient amplifier, and it can dissipate a lot of heat. For this reason, the Darlington transistor amplifier circuit is typically only used in applications where high power output is required.

Applications

The Darlington transistor amplifier circuit can be used in a variety of applications, including: * Audio amplifiers * Power amplifiers * Motor drivers * Relay drivers * Stepper motor drivers

Conclusion

The Darlington transistor amplifier circuit is a powerful and efficient amplifier that can be used in a variety of applications. However, it is important to note that the Darlington transistor amplifier circuit can dissipate a lot of heat, so it is important to design the circuit properly to ensure that it does not overheat.


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