Pre Amplifiers
(pre-Amps) Page Three (3)




This is a "low noise" pre amp based upon a 2N5088 NPN Low Noise Transistor.

This single transistor pre amp is configured in a common collector configuration that provides a gain of X4 ( or +12db). It is stable and has excellent audio frequency response of below 20Hz to above 30KHz.

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Here is another 2N5088 pre amp design that provides a gain factor of X17 (or +25db). This pre amp is also stable and has excellent audio frequency response from below 20Hz to well above 30KHz as well.

This time the pre amp is configured in a common emitter configuration that provides a higher gain ( X17 or +25db). Same Transistor, just a different orientation.

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