What is the working principle of the voltage-dividing bias amplifier circuit?

The voltage-dividing bias amplifier circuit is a common circuit, which is used to provide a constant output current bias or a constant input voltage bias. It is usually used in power amplifier or amplifier stage to provide stable working conditions for other circuits.

The working principle of the voltage-dividing bias amplifier circuit is as follows:

1. First of all, the voltage-dividing bias amplifier circuit uses two voltage-dividing resistors to divide the input voltage into two parts, one for providing a constant input voltage bias and the other for providing a constant output current bias.

2. Then, the offset part of the input voltage will be amplified and used as the input of the amplifier.

3. The output current bias part will be connected to the output end of the amplifier, and the current flowing through it will be limited by the current limiting resistor.

4. Finally, the amplifier will amplify the input voltage and output it to the load, while maintaining the constant bias of the output current.

Generally speaking, the voltage-dividing bias amplifier circuit is a very useful circuit, which can provide stable working conditions for other circuits and ensure the normal operation of the amplifier.