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:
Jul. 03, 2007
Filed:
May. 24, 2005
David A. Gammie, Tucson, AZ (US);
Edward Mullins, Tucson, AZ (US);
Jeffery B. Parfenchuck, Tucson, AZ (US);
David A. Gammie, Tucson, AZ (US);
Edward Mullins, Tucson, AZ (US);
Jeffery B. Parfenchuck, Tucson, AZ (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An amplifier circuit includes first (A) and second (B) operational amplifiers connected in a parallel configuration. A first terminal () of a first input resistor () is coupled to one input of both of the first (A) and second (B) amplifiers. A first terminal () of a second input resistor () is coupled to another input of both of the first (A) and second (B) amplifiers. A differential input voltage is applied between the second terminals of the first and second input resistors. The output signals of the first (A) and second (B) operational amplifiers are combined to produce an output signal (AB) representative of feedback currents produced in the first () and second () input resistors. Upper and lower common mode input voltage ranges associated with the differential input voltage extend substantially above and below the upper and lower supply voltages, respectively, of the amplifier circuit.