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. 04, 2006
Filed:
Apr. 26, 2004
Qing Ou-yang, Shanghai, CN;
Howard Yang, Shanghai, CN;
Yufei Gu, Shanghai, CN;
Integrated Device Technology, Inc., San Jose, CA (US);
Abstract
A voltage/current reference circuit includes a first bipolar transistor and a second bipolar transistor that exhibit a first voltage drop Vand a second voltage drop V, respectively. A first resistor, having a resistance R, is configured to draw a first current equal to (V−V)/R. A second resistor, having a resistance R, is configured to draw a second current equal to V/R. A first transistor supplies the first and second currents to the first and second resistors. A second transistor, having a current mirror configuration with respect to the first transistor, directly provides a reference current equal to (V−V)/R+V/R. A third transistor, having a current mirror configuration with respect to the first transistor, provides a current equal to the reference current to a third resistor having a resistance Rand a third bipolar transistor that exhibits a third voltage drop V, thereby generating a reference voltage.