FET_OPAMP_SAMPLE_AND_HOLD

Published:2009/7/20 21:40:00 Author:Jessie | From:SeekIC

Meter indicates output signal when input is present and stores input in C1 when samples witch is open. Opamp is connected as unity-gain voltage follower. Charge on C1 will be drained within a few minutes by opamp shown. Charge can be held longer by changing to FET-input opamp or by opening both battery circuits with alternative DPDT switch SW2.Developed for classroom demonstrations.-F. M. Mims, Integrated Circuit Projects, Vol. 4, Radio Shack, Fort Worth, TX, 1977, 2nd Ed., p 61-69.



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