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:
Oct. 13, 2009
Filed:
Jun. 28, 2006
Applicant:
Shigetaka Asano, Kasugai, JP;
Inventor:
Shigetaka Asano, Kasugai, JP;
Assignee:
Fujitsu Microelectronics Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor for suppressing power supply resonance caused by the external noise and preventing fluctuation of the power supply voltage. The semiconductor device includes first and second power supply wires for supplying power supply voltages, a variable capacitor circuit connected between the first and second power supply wires, a monitor circuit for detecting the fluctuation of the power supply voltage and generating an output signal indicating the detection thereof, and a controller for changing the capacitance value of the variable capacitor circuit based on the output signal of the monitor circuit.