DERIVATIVE_SLOPE_SAMPLING

Published:2009/7/20 22:07:00 Author:Jessie | From:SeekIC

Analog derivative circuit forces voltage across C1 to follow slowly changing input signal. Current required to keep capacitor voltage equal to signal volt-age is proportional to rate of change of signal voltage. RCA 3033 FET-input opamp will work equally as well as Teledyne Philbrick 1421 shown. Careful selection of values for Rπ and C1 will set rate limit that will reject spikes.-R. E. Bober, This Derivative Circuit Handles Slowly Varying Signals, EDN Magazine, Jan. 20, 1976, p82.



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