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. 09, 1993
Filed:
May. 31, 1991
Charles H Hustig, Hudson, WI (US);
Donald W Moses, Eagan, MN (US);
Robert S Bradford, Woodland Hills, CA (US);
Jeffrey L Ward, Hudson, WI (US);
Wayne P Olson, River Falls, WI (US);
Janice L Cox, St. Paul, MN (US);
Raymond S Miller, Seattle, WA (US);
Robert W Moses, Seattle, WA (US);
James M Kresse, Marlton, NJ (US);
Wadia Digital Corporation, River Falls, WI (US);
Abstract
A direct power output digital to analog conversion of digital audio signals operates to directly convert digital audio signals into an analog power audio output signal capable of driving a speaker, such that there is no need for further amplification or modification of the audio output signal after the direct power output digital to analog conversion of the digital audio signals. The direct power output digital to analog conversion incorporates a digital-to-analog converter within the same feedback circuit as a current-to-voltage power amplifier by using a single resistive feedback network to supply the feedback signal from the output terminal of the current-to-voltage power amplifier to the summing junction of the same current-to-voltage power amplifier.