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:
Jan. 09, 2007
Filed:
May. 29, 2003
Manoj Soman, Pune, IN;
Krishnan Subramoniam, Austin, TX (US);
Hua Hong, Austin, TX (US);
Rajendra Datar, Pune, IN;
John Laurence Melanson, Austin, TX (US);
Manoj Soman, Pune, IN;
Krishnan Subramoniam, Austin, TX (US);
Hua Hong, Austin, TX (US);
Rajendra Datar, Pune, IN;
John Laurence Melanson, Austin, TX (US);
Cirrus Logic, Inc., Austin, TX (US);
Abstract
A gain or input volume controller and method includes a modified R2R ladder network having a number of R2R branches, switches coupled respectively to the R2R branches, and a switch controller for respectively controlling the switches to control and provide an overall gain value for a signal. The switch controller further includes a mapper for mapping a gain control signal to the switches wherein the gain control signal respectively activates or deactivates the switches. A fine gain control stage provides a fine gain control of the overall gain value. A coarse gain control stage is coupled to the fine gain control stage. The coarse gain control stage includes the modified R2R ladder network and provides a coarse gain control of the overall gain value.