Pulse width modulated amplifier

Details Pulse width modulated amplifier Pulse width modulated amplifier

1995-04-21

1997-01-14

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including class d amplifier

381 68, 330253, H03F 3217, H03F 345, H04R 2500

Patent

active

055943861

ABSTRACT:
A class-D pulse width modulated amplifier. The amplifier includes a current switch, an integrator and a comparator connected in a feedback loop. The feedback loop generates an ultrasonic frequency carrier which is utilized in the pulse width modulation of an audio input signal. In one embodiment a current switch and an audio input source are in electrical communication with an integrator. The output signal of the integrator is the input signal to a phase split differential output comparator having hysteresis. The differential output signals of the comparator are the input signals both to a load and to the current switch, thereby completing the feedback loop. In one embodiment the current switch includes compression circuitry.

REFERENCES:
patent: 2915588 (1959-12-01), Bose
patent: 3038964 (1962-06-01), Bose
patent: 3294981 (1966-12-01), Bose
patent: 4015213 (1977-03-01), Hanada
patent: 4456872 (1984-06-01), Froeschle
patent: 4990862 (1991-02-01), Narabu et al.
patent: 5006817 (1991-04-01), Babanezhad
patent: 5160896 (1992-11-01), McCorkle
patent: 5247581 (1993-09-01), Gurcan
Gedaly Levin et al., Designing with hysteretic current-mode control, EDN-Design Feature, Apr. 28, 1994 pp. 95-102.

Affiliated with

Also associated with

Rating

Pulse width modulated amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pulse width modulated amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulse width modulated amplifier will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1391134