Demodulator for a pulse width modulated signal and method

Details Demodulator for a pulse width modulated signal and method Demodulator for a pulse width modulated signal and method

1997-04-30

1999-05-18

Mis, David

Demodulators

Pulse or interrupted continuous wave demodulator

Pulse width demodulator

375238, 375340, 360 29, H03D3/00

Patent

active

059054069

ABSTRACT:
A demodulator for a pulse width modulated signal comprises a counter arranged to count in one direction when the PWM signal is "high" and in the opposite direction when the PWM signal is "low" to arrive at a count representative of a duty cycle. As a result, a value representative of the duty ratio of the PWM signal can be obtained from the up/down counter. In a further embodiment, the up/down counter is clocked by the output of a frequency multiplier, the output of the frequency multiplier having a frequency determined by the pulse width modulated signal frequency multiplied by a predetermined factor. The value of the duty ratio of the PWM signal can then be found regardless of the frequency of the PWM signal.

REFERENCES:
patent: 3740491 (1973-06-01), Cook et al.
patent: 4003083 (1977-01-01), Gariazzo
patent: 4066978 (1978-01-01), Cox, Jr. et al.
patent: 5140256 (1992-08-01), Hara
patent: 5553100 (1996-09-01), Saban et al.
"PWM signal generator"--XP-002073028. Young, Lee, Derwent Publications Ltd., London, GB; Section EI, Week 9623, 1994-08-31.

Affiliated with

Also associated with

Rating

Demodulator for a pulse width modulated signal and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Demodulator for a pulse width modulated signal and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Demodulator for a pulse width modulated signal and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1762377