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:
Oct. 02, 1990
Filed:
Mar. 03, 1989
Yasuhiro Shin, Tokyo, JP;
Kazuo Kobayashi, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A MOS current switching circuit comprises a first MOSFET, a second MOSFET, a first control circuit, a second control circuit, and an inverting amplifier. The inverting amplifier receives an output voltage of a current source to provide a feedback bias voltage to the first and second control circuit which are controlled by a control signal. The first and second control circuits are complementary operated to each other in response to the control signal to provide the feedback bias voltage to the gate electrode of the first or second MOSFET. The first or second MOSFET passes selectively a noiseless constant current from the current source toward the output terminal.