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:
Oct. 20, 2009
Filed:
Aug. 03, 2007
Dimitar T. Trifonov, Vail, AZ (US);
Tony R. Larson, Tucson, AZ (US);
Jerry L. Doorenbos, Tucson, AZ (US);
Dimitar T. Trifonov, Vail, AZ (US);
Tony R. Larson, Tucson, AZ (US);
Jerry L. Doorenbos, Tucson, AZ (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An instrumentation amplifier includes first (A) and second (A) input amplifiers having outputs (A,B) coupled to an output amplifier (). A first auto-zero stage () in the first input amplifier is auto-zeroed to a first voltage level (V), a first input signal (Vin) is amplified by a second auto-zero stage () in the first input amplifier, and the amplified first input signal is coupled to the output amplifier, during a first phase (A). A third auto-zero stage () in the second input amplifier is auto-zeroed to a second voltage level (V), a second input signal (Vin) is amplified by a fourth auto-zero stage () in the second input amplifier, and the amplified second input signal is coupled to the output amplifier, during a second phase (B). The second auto-zero stage is auto-zeroed to the first voltage level, the first input signal is amplified by the first auto-zero stage (), and the amplified first input signal is coupled to the output amplifier, during a third phase (C). The fourth auto-zero stage is auto-zeroed to a the second voltage level, the second input signal is amplified by the third auto-zero stage, and the amplified second input signal is coupled to the output amplifier, during a fourth phase (D).