The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 1983
Filed:
Mar. 24, 1981
Yoshiro Kunugi, Saitama, JP;
Pioneer Electronic Corporation, Tokyo, JP;
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.