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:
Feb. 23, 2010
Filed:
Jan. 09, 2008
Shengyuan LI, Irving, TX (US);
Shengyuan Li, Irving, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A class-AB driver design with improved frequency response is disclosed. In one embodiment, the class-AB driver includes a push-pull output stage, a trans-linear loop, an input stage, a current biasing and enabling circuit. Further, the trans-linear loop is coupled to a signal input terminal ABvia node A, and the push-pull output stage is coupled to the trans-linear loop via node B and node C. Further, the trans-linear loop includes a speed balancing resistor RB in a faster signal traveling path (i.e., ABto ABvia node A and B) to match up the speed with a slower signal traveling path (i.e., ABto ABvia node A and C). In another embodiment, the MOS transistors are also used instead of the speed balancing resistor RB to balance the signal traveling time of the two signal traveling paths.