Pulse-width modulation circuit

Details Pulse-width modulation circuit Pulse-width modulation circuit

1983-03-10

1985-02-26

Laroche, Eugene R.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

375 22, H03K 708

Patent

active

045020248

ABSTRACT:
The invention provides a pulse-width modulation circuit in which an output from a latch circuit for holding a count obtained by counting a reference clock signal in accordance with the period of a signal to be modulated is compared by a comparator with an output from a ramp counter for counting the reference clock signal at a predetermined period so as to perform a pulse-width modulation. The number of bits of the comparator and the ramp counter is decreased by n bits with respect to the number N (N>n) of bits of the latch circuit.

REFERENCES:
patent: 2894254 (1959-07-01), Mork
patent: 3078451 (1974-09-01), Kitano
patent: 3836858 (1963-02-01), Sable
patent: 4138632 (1979-02-01), Pauwels et al.
patent: 4206432 (1980-06-01), Nossen
Anon, "Digitally Controlled Pulse Width Modulator", Jul. 1975, Electronic Engineering, p. 15.

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