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:
Apr. 25, 2017
Filed:
Aug. 26, 2015
Applicant:
Seiko Instruments Inc., Chiba-shi, Chiba, JP;
Inventors:
Kotaro Watanabe, Chiba, JP;
Makoto Mitani, Chiba, JP;
Assignee:
SII SEMICONDUCTOR CORPORATION, Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 11/00 (2006.01); H03B 5/36 (2006.01); H03B 5/32 (2006.01); H03B 5/30 (2006.01); H03L 5/00 (2006.01); G04G 3/00 (2006.01);
U.S. Cl.
CPC ...
H03B 5/364 (2013.01); G04G 3/00 (2013.01); H03B 5/30 (2013.01); H03B 5/32 (2013.01); H03B 5/366 (2013.01); H03L 5/00 (2013.01); H03B 2200/0062 (2013.01);
Abstract
To provide a crystal oscillation circuit low in current consumption and stably short in oscillation start time. A crystal oscillation circuit is equipped with a crystal vibrator, a feedback resistor, a bias circuit, a constant voltage circuit, and an oscillation inverter configured by a constant current inverter. The oscillation inverter is configured so as to be controlled by currents based on input signals from the bias circuit and the crystal vibrator and driven by an output voltage of the constant voltage circuit.