VARIABLE_DEAD_BAND_RESPONSE

Published:2009/7/2 7:44:00 Author:May | From:SeekIC

Diode bridge in feedback loop of opamp provides controlled amount of dead-band response. As value of R2 is increased from 0 ohms, voltage developed across R2. serves to raise dead-band level at which bridge opens and circuit amplifies with normal gain of R3/R1. Below dead-band level. bridge is blocked and circuit gain is equal to parallel combination of R2 and R3 divided by R1. Use matched diodes such as CA3O19 for peaks below ±7 V; for higher peaks,.use 1N914s.-W.G. Jung, IC Op-Amp Cookbook, Howard W.Sams. Indianapolis IN.1974. p 207.



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