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The Peak Square detector is a cross between the Mean Square detector and the Peak detector. Like the Peak detector, it samples the peak of the input signal, but it shows an averaged value, so it does not show the true peak level unless the input level is constant during the sample period.
The Peak Square detector is one of the components of the Gain-Sharing Automatic Mixer.
The Peak detector detects the positive peaks in the input signal(s) and incorporates an exponential signal decay of up to 67% before the next peak detected. Before sending, the detector passes the output through a low-pass filter to smooth the output signal.