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:
Oct. 29, 1985
Filed:
Dec. 02, 1983
Yasuhiko Nishikubo, Tokorozawa, JP;
Toyoharu Fujikawa, Tokorozawa, JP;
Tsutomu Tanaka, Tokorozawa, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
A temperature detector made by a CMOS integrated circuit. The temperature detector comprises a first constant voltage circuit for producing a first constant voltage, a second constant voltage circuit applied with the first constant voltage for producing a second constant voltage, and a ring oscillator applied with the second constant voltage for producing an output voltage dependent of ambient temperature. Each constant voltage circuit has a standard resistor in the form of a diffusion resistor, a current-mirror circuit as a standard voltage generating circuit, and a voltage follower, and the ring oscillator has a delay resistor formed by a MOS transistor.