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:
Nov. 09, 2004
Filed:
Feb. 05, 2003
Douglas Blaine Butler, Colorado Springs, CO (US);
Other;
Abstract
A bandgap reference circuit includes a current-voltage mirror circuit having first, second, third, and fourth nodes, a transistor having a current path coupled between a source of supply voltage and the first node, a current mirror portion having an input coupled to the first node and a control terminal coupled to the fourth node, a serially coupled first resistor and first diode coupled between the output of the current mirror portion and ground, a serially coupled second resistor and second diode coupled between the third node and ground, a third diode coupled between the second node and ground, and a differential amplifier having a first input coupled to the fourth node, a second input coupled to the output of the current mirror portion for generating a bandgap reference voltage, and an output coupled to the gate of the transistor.