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:
Sep. 18, 2001
Filed:
Dec. 13, 1999
Marco Corsi, Plano, TX (US);
Priscilla Escobar-Bowser, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Responsive to an external load, an output stage (,) of an amplifier (,) in accordance with the present invention provides a current boosting scheme capable of generating a large output current while maintaining a low quiescent current. The output stage (,) includes a sink control circuit (,) coupled to the input terminal (,) for receiving the output of the input amplifier stage. A translinear loop circuit (,) is coupled to the sink control circuit (,), for receiving the sink pass-through current and for producing a source pass-through current. A current mirror circuit (,) is coupled to the translinear loop circuit (,) for receiving the source pass-through and for producing a bias current output therefrom. An output driver (,) is coupled to the current mirror circuit (,) and the sink control circuit (,), wherein the output driver (,) receives the bias output current and the sink pass-though current to provide an output current. Accordingly, the output stage (,) provides a power efficient bias solution for driving low impedance loads with enhanced sourcing capability of high positive power supply rejection ratio, high output voltage swing, and stable negative feedback architecture.