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. 26, 2016
Filed:
Dec. 23, 2014
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Mitsuaki Sawada, Fujimi, JP;
Yuichi Toriumi, Fujimi, JP;
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/06 (2006.01); H03L 7/08 (2006.01); H03B 5/32 (2006.01); H03B 5/36 (2006.01); H03L 7/099 (2006.01);
U.S. Cl.
CPC ...
H03L 7/0802 (2013.01); H03B 5/326 (2013.01); H03B 5/366 (2013.01); H03L 7/08 (2013.01); H03L 7/099 (2013.01); H03B 2201/0208 (2013.01);
Abstract
An oscillation circuit includes a voltage controlled oscillation circuit that includes a variable capacitance circuit provided with a variable capacitance element whose capacitance value is controlled on the basis of a control voltage and oscillates a vibrator so as to generate an oscillation signal, and a fractional N-PLL circuit that receives the oscillation signal generated by the voltage controlled oscillation circuit and includes a voltage controlled oscillator which controls an oscillation frequency on the basis of control input data (an integral division ratio and a fractional division ratio).