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:
May. 05, 1992
Filed:
Aug. 14, 1991
Hiromi Kawashima, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A test mode input detection circuit for a semiconductor device comprises a first circuit including a group of transistors and a load element, the transistors and load element being connected in series between a power source and an input terminal, a node between the transistor group and the load element forming an output terminal of the first circuit; a second circuit including a transistor whose gate receives an output from the output terminal of the first circuit, and a transistor whose gate receives a power source voltage, these transistors being connected in series between the power source and a ground, a node between the transistors forming an output terminal of the second circuit; and an inverter circuit for providing a test mode signal in response to an output of the second circuit.