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:
May. 08, 2012
Filed:
May. 16, 2009
Daniel Mavencamp, Dallas, TX (US);
Dal Yihong, Plano, TX (US);
Abdelhalim Alsharqawi, Richardson, TX (US);
Steve Martindell, Richardson, TX (US);
Daniel Mavencamp, Dallas, TX (US);
Dal Yihong, Plano, TX (US);
Abdelhalim Alsharqawi, Richardson, TX (US);
Steve Martindell, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Systems and methods for bit stuffing pulse width modulation are provided. Example embodiments of the systems and methods of bit stuffing pulse width modulation disclosed herein may allow for a significant reduction in the size of the bootstrap capacitor while giving up only a small percentage of output drive, and reduce die space. Included in such systems and methods is the ability to digitally detect inactivity on the PMW signals for a class D power amplifier, and to digitally insert small charge pulses at a fairly low repetition rate relative to the normal switching frequency. The low repetition rate may preserve the maximum output power while still allowing enough charge to transfer to the bootstrap capacitor.