Amplifiers – Modulator-demodulator-type amplifier
Patent
1981-03-24
1983-11-15
Mullins, James B.
Amplifiers
Modulator-demodulator-type amplifier
330124R, H03F 338
Patent
active
044158629
ABSTRACT:
A pulse width modulation amplifier in which interchannel distortion is eliminated by making the pulse transition times different between different ones of the channels. Ramp carrier signals having different phases are applied to respective pulse width modulation comparators of the two channels. The ramp carrier signals are generated by applying the output of an oscillator directly to one of the pulse width modulation comparators while the other is generated through a phase delay circuit which provides constant phase relationship independent of the frequency of the output of the oscillator. The output of the oscillator is coupled to one input of a comparator which produces first and second output signals one of which is in a high state depending upon the relative potentials of the two inputs to the comparator. The outputs are coupled to respective constant current sources which charge and discharge a capacitor in accordance with the output state of the comparator. The output voltage from the capacitor is coupled through an integrator circuit to the second of the input terminals of the comparator.
REFERENCES:
patent: 3336538 (1967-08-01), Crowhurst
patent: 4162455 (1979-07-01), Birt
patent: 4164714 (1979-08-01), Swanson
"Amplificateur Audio 100 W Classe D A VMOS" EAI, Jun. 15, 1979, pp. 54, 55.
Mullins James B.
Pioneer Electronic Corporation
LandOfFree
Pulse width modulation 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 modulation amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulse width modulation amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-161461