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:
Aug. 17, 2010
Filed:
Mar. 05, 2008
Masaya Hirose, Kyoto, JP;
Kinya Daio, Kyoto, JP;
Hiroki Taniguchi, Kyoto, JP;
Kazunari Ikeda, Shiga, JP;
Takahisa Tokushige, Osaka, JP;
Masaya Hirose, Kyoto, JP;
Kinya Daio, Kyoto, JP;
Hiroki Taniguchi, Kyoto, JP;
Kazunari Ikeda, Shiga, JP;
Takahisa Tokushige, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A semiconductor deviceincludes a normal circuitand a voltage fluctuation detection circuitconnected to a power supplyin common with the normal circuit. The voltage fluctuation detection circuitincludes an inverting amplifier, a switching element, which is connected between input and output terminals of the inverting amplifier, and a capacitance elementconnected to the input terminal of the inverting amplifier. After the normal circuitand the switching elementare set to an operating state and ON state, respectively, when the switching elementis set to OFF state at an arbitrary time, charge corresponding to a power supply voltage Vcat that time accumulates in the capacitance element. After the normal circuitis set to a suspended state, a potential VDD of the power supplyis set to an arbitrary value, and the inverting amplifiercompares the value of a power supply voltage Vc with the voltage value Vccorresponding to the charge held in the capacitance element