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. 21, 2004
Filed:
Dec. 03, 2001
Applicant:
Inventors:
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 3/26 ;
U.S. Cl.
CPC ...
H03F 3/26 ;
Abstract
The present invention provides an ultra linear, high speed operational amplifier output stage ( ). The advantages of the operational amplifier output stage disclosed is significantly higher linearity for the same supply current, or equivalent linearity using a lower supply current. The present invention achieves this using an pre-driver sub-stage ( ) having a plurality of translinear loops so that there is no net signal loss to the final sub-stage ( ). The output of the disclosed operational amplifier output stage takes the form; &dgr;I ≈&bgr; *&bgr; *&dgr;I . When used with a localized feedback circuitry, bandwidth is extended.