Precision peak detector uses no precision components


Posted on Apr 7, 2012

When you need a precision peak detector, you would usually implement it with one or several op amps and a few other associated components. This technique usually works well unless your design requires operation higher than a few kilohertz. In designs requiring such operation, the accuracy of the circuit severely deteriorates unless at least one of the amplifiers has a high slew rate and frequency response extending to tens or even hundreds of megahertz. Performance depends on the desired frequency response and peak-to-peak input-voltage range of the peak detector (Reference 1).






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