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:
Dec. 16, 1997
Filed:
Sep. 14, 1995
Applicant:
Inventors:
Charles D Thompson, Buda, TX (US);
Salvador R Bernadas, Austin, TX (US);
Michael V Jenkins, Austin, TX (US);
Assignee:
Crystal Semiconductor Corporation, Austin, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G10H / ; G10H / ; G10H / ;
U.S. Cl.
CPC ...
84615 ; 84617 ; 84624 ; 84625 ;
Abstract
The present invention relates to a tone signal generator. The tone signal generator includes first tone signal generation means for producing a dual-tone, multi-frequency ('DTMF') audio signal; second tone signal means for producing a plurality of non-DTMF audio signals; storage means for storing data that represents at least one channel of an output audio tone signal; and selection means for selectively loading the DTMF signal into the storage means and for selectively accumulating the non-DTMF signals into the storage means so as to generate the output tone signal.