MF and HF rectifier and clamping cct - has comparator with one input at reference voltage and second input at D.C. -free oscillations

TLDR: In this paper, a comparator whose one input is at reference voltage, while its other input receives D.C.-free oscillations via a capacitor is added to the oscillation input of the comparator.

Abstract: The circuit incorporates a comparator whose one input is at reference voltage, while its other input receives D.C.-free oscillations, e.g. via a capacitor. To the oscillation input of the comparator a high-e.g. battery voltage of the circuit is additionally connected via a series combination of a low pass and a diode. The low pass factor is chosen to be higher than that of the comparator. The diode polarity provides for decoupling of the oscillation generator relative to the low pass. The output from the feedback circuit provides the limited output signal, whose limit threshold is set by the reference voltage at the comparator input. If the limited output signal is fed into a low pass filter, a rectified equivalent of the initial input signal may be obtained.