SUMMING_CHOPPING_AMPLIFIER

Published:2009/7/10 22:09:00 Author:May | From:SeekIC

D-c operational amplioer is connected as summing amplifier with two inputs. Input-output rela-tionship is independent of ampliier charac.teristics because amplifer gcdn is sufficienlly high and effects of d.c drift in transistor circults are sufficienlly small. D-c and low-fre-quency components are amplifier in chopper amplifier and integrating ampliler, while high-frequency a-c components go through preamplifier.The two signals are combined and further boosted by power omplifier. In togretting section has time constant of 12 sec determined by C2-R3.-W. Hochwald and F.H. Gerhard, D-C Operational Amplifier With Transistor Chopper, Electronics, 32;17, p 94-96.



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