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:
Aug. 27, 2002
Filed:
Mar. 30, 2001
Applicant:
Inventors:
Xavier Albinet, San Marino, FR;
Pascal Guigon, Mas Ricardenque, FR;
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M 3/00 ;
U.S. Cl.
CPC ...
H03M 3/00 ;
Abstract
A digital to analog converter ( ) includes a pulse width modulator ( ) and a class-D amplifier ( ). The class-D amplifier ( ) includes a low pass filter ( ). A differential signal is available from two nodes (outp, outm) on the amplifier. Common mode compensation circuitry ( ) generates a compensation signal during periods where a PWM signal is not being generated to maintain a common mode average value of (Avdd +Avss)/2 from the nodes, without affecting the differential signal.