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:
Apr. 06, 2004
Filed:
Nov. 26, 2002
Stefan Reithmaier, Freising, DE;
Laszio Goetz, Freising, DE;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A comparator includes a differential amplifier stage comprising two emitter-interconnected bipolar transistors whose bases form the two inputs of the comparator, a first load element connected to the collector of the first bipolar transistor and a second load element connected to the collector of the second bipolar transistor. The comparator also includes a first MOSFET and a second MOSFET, a circuit point at which the drop in voltage across the first load element in operation of the differential amplifier stage occurs is connected to the source of the first MOSFET and the backgate of the second MOSFET, the circuit point at which the drop in voltage across the second load element in operation of the differential amplifier stage being connected to the source of the second MOSFET and the backgate of the first MOSFET, and the drain of the second MOSFET forming the output of the comparator. The comparator, in addition to providing the low offset voltage of a differential amplifier stage comprising bipolar transistors, also features a low current consumption and very fast response.