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:
Jan. 14, 1997
Filed:
Jun. 30, 1995
Applicant:
Inventor:
Richard W Ezell, Carrollton, TX (US);
Assignee:
Dallas Semiconductor, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01C / ;
U.S. Cl.
CPC ...
338 89 ; 381106 ; 257538 ;
Abstract
A digital potentiometer adapted for and connected to and interacting directly with a plurality of external switches. Specifically, the various wiper points of a semiconductor resistor array are selected, for each channel of an audio amplification device according to various switch selections. The method and apparatus disclosed also makes priority determinations if more than one external switch is selected at the same time according to which switch was selected first.