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. 06, 1985
Filed:
Dec. 01, 1983
Tsen-Shau Yang, San Jose, CA (US);
Michael Allen, San Francisco, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A temperature compensated differential level shift circuit is provided. An ECL type buffered differential circuit employs a source of threshold voltage, V.sub.T, which matches the temperature-dependent characteristic of the input section of the level shift circuit. In a preferred embodiment, a Schottky diode is provided in the output section of a bandgap reference voltage generator which matches the temperature dependence of a Schottky diode in the input section of the level shift circuit. As temperature shifts, the threshold voltage will shift in a manner that tracks the temperature-produced shift in the input voltage as it passes through the Schottky diode in the input section of the level shift circuit. Matched PNP or NPN transistors may also be used in the input section of the level shift circuit and in the output section of the bandgap reference voltage generator.