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. 16, 2008
Filed:
Apr. 19, 2007
Babak Mazda, Los Altos, CA (US);
Rahul Shinkre, Cupertino, CA (US);
Farzad Sahandiesfanjani, Santa Clara, CA (US);
Maziar Sayyedi, Mountain View, CA (US);
Krishna Prasad Sarangapani, Santa Clara, CA (US);
Babak Mazda, Los Altos, CA (US);
Rahul Shinkre, Cupertino, CA (US);
Farzad Sahandiesfanjani, Santa Clara, CA (US);
Maziar Sayyedi, Mountain View, CA (US);
Krishna Prasad Sarangapani, Santa Clara, CA (US);
Cirrus Logic, Inc., Austin, TX (US);
Abstract
An amplifier is described which includes a first loop including a first amplifier stage having an offset voltage associated therewith. An output stage includes two switching devices in a bridge configuration configured to be coupled between a supply voltage and ground. An output of the bridge configuration is configured to be coupled to a load. The first loop is characterized by a first gain. A decoupling capacitor is configured to be coupled to the load. A second loop which includes the first amplifier stage is configured to charge the decoupling capacitor to a first voltage generated with reference to the offset voltage before operation of the switching devices is enabled. The second loop is characterized by a second gain. The first and second gains are substantially the same such that when operation of the switching devices is enabled a second voltage at the output of the half-bridge configuration is substantially the same as the first voltage.