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. 09, 2001
Filed:
Apr. 06, 1999
Hideki Kanou, Kawasaki, JP;
Masato Matsumiya, Kawasaki, JP;
Satoshi Eto, Kawasaki, JP;
Masato Takita, Kawasaki, JP;
Ayako Kitamoto, Kawasaki, JP;
Toshikazu Nakamura, Kawasaki, JP;
Kuninori Kawabata, Kawasaki, JP;
Masatomo Hasegawa, Kawasaki, JP;
Toru Koga, Kawasaki, JP;
Yuki Ishii, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A semiconductor device has a DLL circuit or the like for adjusting the phase of an external clock and producing an internal clock that lags behind by a given phase. The semiconductor device further includes a clock frequency judging unit for judging the frequency of a first clock on the basis of an indication signal indicating a delay value of the first clock in the DLL circuit or the like to output a control signal; and a clock selecting unit for selecting either one of the first clock and the second clock, in response to the control signal.