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:
Dec. 29, 1987
Filed:
Apr. 25, 1986
Applicant:
Inventors:
Tetsuro Wada, Yokohama, JP;
Yasuo Ohkubo, Tokyo, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03K / ; H03K / ;
U.S. Cl.
CPC ...
307594 ; 3072 / ; 307603 ; 307605 ; 307362 ; 307304 ; 371 25 ; 371 66 ; 340663 ;
Abstract
A power voltage drop detecting circuit includes VDD and ground terminals supplied with power voltage VD, a resistor connected at one end to the VDD terminal, a MOS transistor connected between the other end of the resistor and the ground terminal, and a CMOS inverter for producing an output signal according to a voltage at the junction between the resistor and the MOS transistor. The detecting circuit further includes a control pad connected to the control gate of the n-channel MOS transistor and supplied with control voltage VC at different levels in the test mode and detect modes, respectively.