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. 02, 2002
Filed:
Aug. 04, 2000
Robert L. Chao, Los Altos, CA (US);
Other;
Abstract
An improved voltage reference circuit relies on electrically adjustable analog devices fabricated on a common substrate. The circuit has two electrically adjustable matched transistor pairs. A first matched transistor pair includes an adjusting transistor and a differential pair transistor. A second matched transistor pair also includes an adjusting transistor and a differential pair transistor. Each of the matched transistor pairs share an insulated gate or electrically connected insulated gates. Geometrical and electrical matching occurs as between the two adjusting transistors and between the two differential pair transistors. The two differential pair transistors are electrically connected at the source terminals to form a differential circuit. A feedback loop, which includes an amplifier, a fixed resistor and a current source complete the circuit.