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. 15, 2005
Filed:
May. 28, 2003
Marco Corsi, Parker, TX (US);
William J. Bright, Dallas, TX (US);
Martin Kithinji Kinyua, Dallas, TX (US);
Marco Corsi, Parker, TX (US);
William J. Bright, Dallas, TX (US);
Martin Kithinji Kinyua, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A circuit and method that provides a cascode current source/sink with high output impedance. In one example, the dependency on the external load is reduced by directing a compensation current corresponding to change in base current in the cascode (Q) in an approach such that the compensation current cancels out the error of the cascode (Q). In a further example, biasing circuitry () is included and arranged such that change in base current of the cascode (Q) is detected and a corresponding current is summed at the emitter of the cascode (Q) such that the collector current of the cascode (Q) remains unchanged.