AnsweredAssumed Answered

Fast Peak Detection Ciruit using AD823

Question asked by Bluechip on Dec 20, 2013
Latest reply on Feb 4, 2014 by ScottH


I am trying to replace AD843 Opamp using a surface mount Opamp (AD823) for a fast peak detection circuit as shown in Page 11 of the AD843 Datasheet below.


Currently, I am trying to simulate the circuit in PSPICE using opamp models for AD823, instead of AD847/AD843 as shown in the diagram.

However, I am having issue using AD823 to make the circuit functional, as it does not detect the peak of a signal as we were expecting. Any idea why I am having this problem?