Pulse-width modulating device

Details Pulse-width modulating device Pulse-width modulating device

1996-08-08

1997-11-11

Mis, David

Modulators

Pulse or interrupted continuous wave modulator

Pulse width modulator

329300, 329303, 375206, 375367, H03K 708, H03D 300, H04L 2722

Patent

active

056868693

ABSTRACT:
A pulse-width modulating device comprises: a counter for generating a plurality of counter signals of n-bit, where n is an integer of 2 or more; a fundamental waveform generator for outputting a signal for the least significant bit of the count signal as the most significant bit of a fundamental waveform signal, obtaining a first product of inverted signals of all of the count signals for higher order bits than LSB, obtaining a second product of the first product and the count signal for a certain bit, carrying out this for every bit, and outputting n-bit fundamental waveform signals extending from the upper order bits to the lower order bits; and a pulse-width modulator for obtaining a product sum total for each bit of the n-bit data signal and each of the n-bit of fundamental waveform signals corresponding to the each bits of n-bit data and generating a pulse-width modulated signal, configured in such a manner that a pulse-width modulating signal having a pulse-width corresponding to the data signal and having a spectrum of a high frequency can be obtained.

REFERENCES:
patent: 4630283 (1986-12-01), Schiff
patent: 5592506 (1997-01-01), Omura et al.

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