An amplitude adjusted pulse width discriminator and method therefor wherein a received video pulse is sampled and held when it crosses a threshold An indication of a valid pulse being present is given if the level of the signal at the input is within a preset range around the level of the held sample pulse at the end of a preset pulse width discrimination interval

Amplitude adjusted pulse width discriminator and method therefor

System for separating pulses containing information in a pulse width modulated pulse train, wherein the leading edges of the pulses occur at a fixed repetition rate. Noise which occurs on the leading edge of the pulses is reduced by slicing the fixed position leading edges. A gating wave stabilized by the received pulse train, and which is insensitive to wide band noise, opens a gate for the pulses after the leading edge of each pulse, and closes the gate before the leading edge of the next pulse. A plurality of gates can be provided to separate pulse trains which are multiplexed to form a composite pulse train. The gates do not affect the pulse width modulation represented by the position of the lagging edges of the pulses and reduces the noise accompanying the demodulated signals.

N Parker

Papers

Pulse train processing system with discrimination against noise for use with pulse width modulation