Pulse-width modulator

Details Pulse-width modulator Pulse-width modulator

1990-12-31

1991-10-01

Mis, David

Modulators

Pulse or interrupted continuous wave modulator

Pulse width modulator

375 22, H03K 708

Patent

active

050537296

ABSTRACT:
A pulse-width modulator accepts a 7 bit binary signal input which is gated to an adder circuit. The adder is also supplied with a constant binary 1 input and has an output that is coupled to an 8 bit delay circuit that has its output coupled back to another input of the adder. The delay circuit and adder act as a recursive filter that is reset when the gate circuit is opened every 128th count. The most significant bit in the output of the delay circuit is a direct measure of the corresponding pulse width of the binary signal and is coupled to an integrating circuit.

REFERENCES:
patent: 4160958 (1979-07-01), Mims et al.
patent: 4685114 (1987-08-01), Welling

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