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:
Mar. 24, 1998
Filed:
Jan. 21, 1997
Takaaki Suzuki, Kawasaki, JP;
Makoto Niimi, Kasugai, JP;
Hideaki Kawai, Kawasaki, JP;
Masato Kaida, Satsuma-gun, JP;
Fujitsu Limited, Kawasaki, JP;
Fujitsu VLSI Limited, Kasugai, JP;
Kyushu Fujitsu Electronics Limited, Satsuma-gun, JP;
Abstract
A semiconductor integrated circuit device is intended to prevent generation of an unnecessary leak current and hence to reduce power consumption. In the semiconductor integrated circuit device comprising: a current path which is formed between a predetermined power source terminal (or a predetermined power source pad) and a predetermined low potential power source line, a comparison circuit for comparing a node potential in the current path with a predetermined threshold voltage to thereby detect whether the voltage applied to said power source terminal is a voltage which is larger than an upper limit value of the terminal voltage, a signal generation circuit for generating a predetermined logic signal when the states of some designated control terminals satisfy a combination which is determined in advance, if the logic state of an output signal of said signal generation circuit is a predetermined logic state when said comparison circuit has detected that the voltage applied to the power source terminal is a voltage which is larger than an upper limit value of the terminal voltage, a circuit equipped with a predetermined function mounted on the chip is activated, the semiconductor integrated circuit device being characterized by comprising ON/OFF circuit for turning on and off said current path in accordance with the logic state of the output signal of said signal generation circuit.