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:
Dec. 17, 2013
Filed:
Jul. 28, 2010
Sudarshan Udayashankar, Tucson, AZ (US);
Jerry L. Doorenbos, Tucson, AZ (US);
Sudarshan Udayashankar, Tucson, AZ (US);
Jerry L. Doorenbos, Tucson, AZ (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An output stage (-) includes a gain circuit (Q,Q) for driving a base of a main transistor (Q) having a collector coupled to an output () in response to an input signal V) which also controls a base of an auxiliary transistor (Q) having a collector coupled to the output. A clamping transistor (Q) has a control electrode coupled to the base of the auxiliary transistor, a first electrode coupled to the output, and a second electrode coupled to provide feedback from the output via the gain circuit to the base of the main transistor and to provide feedback from the output to the base of the auxiliary transistor. When the auxiliary transistor goes into deep saturation it causes the clamping transistor to provide negative feedback from the output to the main output stage so as to prevent the main transistor from going into deep saturation.