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:
Jun. 12, 2001
Filed:
Aug. 23, 1996
Applicant:
Inventor:
Masami Takai, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 1/722 ;
U.S. Cl.
CPC ...
H03K 1/722 ;
Abstract
A power supply voltage detecting circuit includes: a depletion MOS transistor having its source and gate connected to the base thereof; and an enhancement MOS transistor which is serially connected to the depletion MOS transistor, which has its source connected to its base, and which is fed an output of the voltage divider through its gate. Therefore, the production yield can be greatly improved, and the production costs can be greatly reduced.