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:
Jul. 21, 1998
Filed:
Nov. 21, 1994
Applicant:
Inventors:
Assignee:
United Microelectronics Corporation, Hsin-Chu, TW;
Primary Examiner:
Int. Cl.
CPC ...
H03G / ;
U.S. Cl.
CPC ...
381104 ; 381119 ;
Abstract
A digital/analog sound synthesizing circuit comprises an RC oscillator outputting a system basic frequency, a timing generator converting the basic frequency into timing signals, a sound synthesizer producing sound numerical code data, and a digital/analog converter outputting an analog signal to drive a speaker. A voltage stabilizing circuit controls the RC oscillator and the digital/analog converter to eliminate sound frequency and volume instability.
Quick Actions:
Huang, Chi-Mao. (1998). Stable sound synthesizing circuit (U.S. Patent No. 5784475). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5784475
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