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. 13, 1977
Filed:
Aug. 10, 1976
Gijun Idei, Yokohama, JA;
Tokyo Shibaura Electric Co., Ltd., Tokyo, JA;
Abstract
A constant voltage circuit comprises first and second circuit terminals; a current source connected to said first and second circuit terminals; a first npn transistor whose collector is connected to the first circuit terminal through a resistor; a second npn transistor having a collector connected to the emitter of the first npn transistor, a base connected to the collector of the first npn transistor, and an emitter connected to the second circuit terminal; a third npn transistor having a base connected to the base of the first npn transistor, an emitter connected to the emitter of the first npn transistor through a resistor and a collector connected to the first circuit terminal through a resistor; a fourth transistor having a base connected to the collector of the third transistor and a collector and emitter coupled to the first and second circuit terminals; a resistor connected between the first circuit terminal and a junction of the bases of the first and third transistors; and a resistor connected between the second circuit terminal and a junction between the bases of the first and third transistors.