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:
Aug. 12, 2008
Filed:
Jun. 22, 2006
Vadim Valerievich Ivanov, Tucson, AZ (US);
Keith Eric Sanborn, Tucson, AZ (US);
Vadim Valerievich Ivanov, Tucson, AZ (US);
Keith Eric Sanborn, Tucson, AZ (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A circuit producing a reversed bandgap reference voltage circuit Vincludes first and second resistors coupled as a voltage divider between ground and a first conductor, a base of a first transistor being coupled to the voltage divider to produce a first voltage V(1+1/M) between the first conductor and ground, M being a ratio of the resistances of the first and second resistors. A third resistor is coupled between a base of the second transistor and ground to produce a second voltage V+Vbetween the second conductor and ground. First circuitry forces the collector current of the first transistor to be equal to the collector current of the second transistor, and second circuitry forces the first voltage V(1+1/M) to be equal the second voltage V+V. One of the first circuitry and second circuitry includes an operational amplifier coupled to effectuate the forcing.