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. 14, 1996
Filed:
Sep. 23, 1992
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; G05F / ; G05F / ; H03K / ;
U.S. Cl.
CPC ...
327530 ; 327535 ; 327537 ; 327543 ; 327108 ; 323312 ;
Abstract
A current source circuit according to the present invention is provided with an output terminal 100, a bias voltage source 21, N channel MOS transistors 2 and 1 and P channel MOS transistor 3. The source of transistor 2, the drain of transistor 1 and the drain of transistor 3 are connected to a common node, the drain of transistor 2 is connected to output terminal 100 and the gate of transistor 2 is connected to bias voltage source 21. Conductions of transistors 1 and 3 are dynamically controlled in response to an external signal. As a result, it is possible to implement a current source circuit having a small number of devices and enabling an operation at a high speed.