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:
Mar. 23, 2010
Filed:
Jul. 16, 2008
Ravi Jitendra Mehta, Bangalore, IN;
Sumantra Seth, Bangalore, IN;
Sujoy Chinmoy Chakravarty, Bangalore, IN;
Ravi Jitendra Mehta, Bangalore, IN;
Sumantra Seth, Bangalore, IN;
Sujoy Chinmoy Chakravarty, Bangalore, IN;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method, apparatus and system of constant output common mode voltage of a pre-amplifier circuit are disclosed. In one embodiment, a system includes a first circuit, a comparator circuit coupled with an output of the first circuit, a pre-amplifier circuit of the comparator circuit, a tracking circuit coupled with a common output location of the pre-amplifier circuit to provide (e.g., source/sink) an additional current to the common output location of the pre-amplifier circuit using an alternate current path in the tracking circuit when an input common mode of the pre-amplifier circuit is beyond a saturation range, and a second circuit of the comparator circuit coupled with the pre-amplifier circuit. A scaled version of a pair of input transistors of a pre-amplifier circuit of the tracking circuit may be created using a scaling factor ('N').