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. 14, 2006
Filed:
May. 28, 2004
Tatsuhiro Mizumasa, Kawasaki, JP;
Atsushi Hitaka, Kawasaki, JP;
Tatsuhiro Mizumasa, Kawasaki, JP;
Atsushi Hitaka, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A frequency detecting circuitdetects frequency of a sampling pulse SP, and outputs the detected frequency as a detection value VOUT. A current adjusting circuitadjusts a power supply current Ivd to be supplied to an AD converterin accordance with the detection value VOUT. The power supply current Ivd varies continuously so as to follow the sampling frequency. As a result, an optimum power supply current Ivd can always be supplied in accordance with the operating frequency of the AD converter. That is, power consumption of the AD convertercan be reduced. Since the power supply current Ivd can be adjusted in accordance with the sampling frequency, it is possible to form the AD converterthat has a wide frequency band and allows great versatility.