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:
Jun. 28, 1983
Filed:
Apr. 28, 1981
Applicant:
Inventor:
Leslie Miskin, Gundelfingen, DE;
Assignee:
ITT Industries, Inc., New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F / ; H03F / ; H03F / ;
U.S. Cl.
CPC ...
330251 ; 3302 / ; 330 10 ; 330126 ;
Abstract
An audio power amplifier with class-D push pull output stage is disclosed using a 'mixture' of pulse-width modulation and pulse-amplitude modulation and driving the class-D push pull output stage with the resulting combination signal. To do this, the digital output signal of the analog-to-digital converter in the input stage is split up in such a way that only its high-order bits control the pulse-width modulator, while the other low-order bitsare changed into the aforementioned pulse-amplitude-modulated signal by means of an analog-to-digital converter.