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. 30, 1997
Filed:
Apr. 16, 1996
Applicant:
Inventor:
Xiaole Chen, Milpitas, CA (US);
Assignee:
Exar Corporation, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06G / ;
U.S. Cl.
CPC ...
327560 ; 327346 ;
Abstract
A programmable gain amplifier which can be realized using CMOS transistors. The amplifier provides a plurality of linear gain segments, with each of the gain segments having a different gain. A particular combination of the gain segments are selected using a digital control input to give an approximation of a linear dB output. By appropriately choosing the segments and how they combine, an approximation that is accurate to the least significant bit of a digital system can be provided.