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:
Jan. 16, 2001
Filed:
Sep. 14, 1999
Yasuhiro Sakurai, Sayama, JP;
Hiroyuki Fukayama, Sayama, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
A constant voltage generation circuit (,) for driving a temperature-compensated crystal oscillation circuit (,) comprises a differential circuit (,), a dc load (,) for supplying feedback signals to the differential circuit (,), a driver (,) for driving the dc load (,) and the temperature-compensated crystal oscillation circuit (,) under control by control signals outputted by the differential circuit (,), and a low-pass filter (,) made up of passive elements only and for applying the control signals to the driver (,) after removing high frequency components out of the control signals, thereby preventing an increase of phase noise while achieving low power consumption.