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. 04, 1993
Filed:
Feb. 05, 1992
Hiroaki Masumoto, Kyoto, JP;
Shigemi Chimura, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
The improved CMOS output circuit has an enhancement-type PMOS and an enhancement-type NMOS connected in order between a power supply line and a reference potential line and that has the junction between the PMOS and the NMOS connected to an output terminal. The PMOS is such that a P-type region is provided in the back gate region to form a diode, with the back gate region being connected to the power supply line via the diode. A switch circuit is inserted between the gate of this PMOS and said junction or the output terminal. When a voltage higher than the voltage on the power supply line is applied to the output terminal, the applied voltage will turn on the switch circuit.