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. 09, 2010
Filed:
Oct. 27, 2006
Applicants:
Sung-hsien Chang, Irvine, CA (US);
Ramon Gomez, San Juan Capistrano, CA (US);
Inventors:
Sung-Hsien Chang, Irvine, CA (US);
Ramon Gomez, San Juan Capistrano, CA (US);
Assignee:
Broadcom Corporation, Irvine, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A programmable attenuator includes a resistor ladder having a plurality of taps to provide a coarse gain control. Coupled to each tap is a plurality of switches. Control logic activates or deactivates individual switches in the plurality of switches to provide a fine gain control. More specifically, a set of activated switches provides fine gain control by determining an overall attenuation level interpolated between an adjacent pair of taps.