Simple two transistor amplifier

- a simple design for a two transistor amplifier with feedback

This electronic circuit design shows a simple two transistor amplifier with feedback. It offers a reasonably high impedance while providing a low output impedance. It is an ideal transistor amplifier circuit for applications where a higher level of gain is required than that which would be provided by a single transistor stage.

The resistors R1 and R2 are chosen to set the base of TR1 to around the mid point. If some current limiting is required then it is possible to place a resistor between the emitter of TR2 and the supply.