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, 1982
Filed:
Mar. 13, 1980
Applicant:
Inventor:
Yukio Hashimoto, Tokorozawa, JP;
Assignee:
Citizen Watch Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323275 ; 307525 ; 323907 ; 368204 ;
Abstract
An electronic timepiece contains a supply voltage source which provides a supply voltage controlled in accordance with temperature, whereby power consumption is reduced by supplying the timepiece circuit with only the amplitude of supply voltage required at any particular operating temperature. Voltage control is performed in accordance with variations in propagation times of circuit elements with temperature, as determined by variations in the frequency of a ring oscillator circuit.