LOGAMP_WITH_OFFSET_ADJUSTMENT

Published:2009/7/14 3:44:00 Author:May | From:SeekIC

Motorola MC1556G opamp provides accurate operation down to millivolt input levels without bias current compensation. Input offset is adiusted with 10K pot, 0.1-μF capacitor is required actoss feedback transistot to reduce AC gain.Diode protects transistor from polarity reversal of input voltage. Power supplies should be bypassed as close as possible to amplifier socket.Positive input voltage gives negative output voltage. IC includes output short-circuit protection.-K. Huehne, Transistor Logarithmic Conversion Using an Integrated Operational Amplifier, Motorola, Phoenix, AZ, 1971, AN-261A, p 3.



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