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:
Jun. 30, 2009
Filed:
Aug. 14, 2005
Applicant:
Hee Wong, San Jose, CA (US);
Inventor:
Hee Wong, San Jose, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/017 (2006.01);
U.S. Cl.
CPC ...
Abstract
Dead-time gaps are inserted into one of two output transistor control signals from a digital pulse width modulator by controlling the leading and trailing edges using the same phase-division and dithering signals employed by the digital pulse width modulator. Adders add the phase select signals from the digital pulse width modulator and the dithering signal to the leading and trailing edge control signals, with the output employed by multiplexers as select controls in selecting a phase of from the phase-shifted versions of the system clock with which to clock latches controlling the leading and trailing edges.