This simulation illustrates a precision positive peak detector driven by a composite AC input. The upper plot shows the input waveform (blue) with multiple frequency components, resulting in sharp peaks and valleys. The measured values confirm a peak amplitude of about ±761 mV, a dominant frequency near 200 Hz, and an RMS level of roughly 447 mV. These numbers are typical for an audio-like signal rather than a pure sine wave. In the lower schematic, the op-amp is configured with very high open-l

A peak detector circuit captures and holds the highest voltage level of an input signal. It typically uses a diode to allow current flow only during the rising edge of the input and a capacitor to store the peak value. A resistor provides a slow discharge path, allowing the circuit to track higher future peaks while ignoring lower fluctuations. This setup is useful in signal analysis, envelope detection, and amplitude monitoring. #ElectronicsEducation #electronicsrd #peakdetector | Electronics E