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:
Nov. 10, 2015
Filed:
Nov. 26, 2009
Hashem Zare-hoseini, Cambridge, GB;
Hashem Zare-Hoseini, Cambridge, GB;
Ian Sabberton, Cambridge, GB;
QUALCOMM TECHNOLOGIES INTERNATIONAL, LTD., Cambridge, GB;
Abstract
A variable gain amplifier circuit () comprising an amplifier element () having an input () and an output (); a feedback loop () having a feedback impedance () connected between the input () and output () of the amplifier element (); an input branch () having an input resistance connected between an input of the variable gain amplifier circuit and the input () of the amplifier element (); and a plurality of switches for selecting a gain of the variable gain amplifier circuit (); characterised in that the variable gain amplifier circuit () further comprises an intermediate element () having an input and an output, the input being connected to a node between one of the switches and the feedback impedance (), such that the output can provide a signal which can be used to attenuate a signal component in the output () of the amplifier element () caused by a non-linearity in the plurality of switches.