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. 14, 2015
Filed:
Mar. 07, 2013
Applicant:
Kabushiki Kaisha Toshiba, Minato-ku, Tokyo, JP;
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 1/00 (2006.01); H03L 7/00 (2006.01); H03L 1/04 (2006.01); H03L 7/22 (2006.01); H03L 1/02 (2006.01);
U.S. Cl.
CPC ...
H03L 7/00 (2013.01); H03L 1/026 (2013.01); H03L 1/022 (2013.01); H03L 1/027 (2013.01); H03L 1/04 (2013.01); H03L 7/22 (2013.01); H03L 2207/50 (2013.01);
Abstract
According to one embodiment, a first oscillator has an oscillation frequency that is changed depending on a temperature. A second oscillator has different temperature characteristics from the first oscillator. An on-chip heater heats the first oscillator and the second oscillator. A counter counts a first oscillation signal of the first oscillator. An ADPLL generates a third oscillation signal on the basis of a second oscillation signal of the second oscillator and corrects the frequency of the third oscillation signal on the basis of a count value of the counter.