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:
Jul. 22, 2014
Filed:
Feb. 25, 2010
Sanjeev Ranganathan, Bangalore, IN;
Shyam Somayajula, Bangalore, IN;
Srinath Sridharan, Bangalore, IN;
Lionel Cimaz, Pleumeleuc, FR;
Sanjeev Ranganathan, Bangalore, IN;
Shyam Somayajula, Bangalore, IN;
Srinath Sridharan, Bangalore, IN;
Lionel Cimaz, Pleumeleuc, FR;
St-Ericsson India Pvt. Ltd., New Delhi, IN;
St-Ericsson SA, Plan-les-Ouates, CH;
Abstract
Systems and methods for suppressing pop-up noise in an audio signal are disclosed. The system includes a driver circuit shared by a pin interface and a complementary pin interface. A control unit is coupled to the pin interface and the complementary pin interface. To activate the pin interface, the control unit is configured to first activate the driver output at the complementary pin interface. Once the complementary pin interface achieves a preset voltage, the driver output is switched to the pin interface by the control unit. In addition, the driver circuit can be calibrated for a DC offset on the complementary pin interface by re-using calibration data calculated at the pin interface. Further, DC correction signals can be provided from a pre-biasing circuit based on the calibration data of the driver circuit.