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Navigation:: Home >> Circuits and design >> this page 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.
Two transistor amplifier circuit with feedback
Av = (R4 + R5) / R4
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.
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