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:
Feb. 18, 1997
Filed:
Mar. 25, 1996
Applicant:
Inventor:
Katherine W White, San Diego, CA (US);
Assignee:
Qualcomm Incorporated, San Diego, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
327356 ; 327355 ;
Abstract
The present invention is a novel and improved method and apparatus of multiplying an analog signal by a pulse modulated signal. The apparatus includes a CMOS or equivalent gate. The pulse modulated signal is applied to the input of the gate. The analog control signal is applied to the power pin of the part. The output of the gate is the product of the two signals. The output may be lowpass filtered to obtain a resultant analog value. A scaling and offset circuit can be used to scale the output to comprise a zero pulse width modulation value wherein the value of the analog control signal has no affect on the resultant analog value.