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. 23, 1990
Filed:
Oct. 05, 1988
Mitsuyuki Kunieda, Kawasaki, JP;
Tadahiro Fujii, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A semiconductor IC includes a first logic circuit, having a first threshold voltage, for outputting a logic signal corresponding to a level of an input signal which is externally supplied thereto, and an internal circuit for receiving a logic signal from the first logic circuit and executing a predetermined operation. The semiconductor IC further includes a second logic circuit, formed between the first logic circuit and the internal circuit, and having a second threshold voltage higher than the first threshold voltage, one input terminal thereof being connected to an output terminal of the first logic circuit, and the other input terminal receiving a control signal. The control signal is generated while power source noise caused by an operation of the internal circuit is being generated. While the control signal is being generated, a signal of a predetermined logic level is supplied from the second logic circuit to the internal circuit, regardless of an output signal level from the first logic circuit.