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:
Feb. 12, 2002
Filed:
Mar. 05, 1999
Applicant:
Inventors:
Eiichi Hasegawa, Tokyo, JP;
Haruhiko Otsuka, Tokyo, JP;
Assignee:
Nippon Precision Circuits, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B 5/32 ; H03B 5/36 ; H03L 1/00 ;
U.S. Cl.
CPC ...
H03B 5/32 ; H03B 5/36 ; H03L 1/00 ;
Abstract
In a quartz oscillation circuit, electric current flowing through a quartz oscillator is reduced. Resistors Rg and Rd are provided respectively in any of paths formed by an output terminal, a capacitance element Cd and a power supply terminal VDD of a CMOS inverter and any of paths formed by an input terminal, a capacitance element Cg and a power supply terminal VDD, thereby reducing a current flowing through a quartz oscillator. In particular, the total value of the resistors Rd and Rg is determined in a range of from 10&OHgr; to 320&OHgr;, thereby reducing a quartz current and obtaining a required negative resistance.