A low noise preamplifier based on the Complementary Feedback Pair (CFP)

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Complementary feedback pair preamplifier circuit diagram
This simple preamplifier circuit is simple to construct and has a low noise figure.  It is based on the Complementary Feedback Pair circuit. The main disadvantage is the limited output voltage swing of about 2 volts. While the biasing of Q1 looks incorrect it is the best compromise for minimum distortion.

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