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. 28, 1977
Filed:
Dec. 14, 1973
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323 19 ; 307251 ; 323 / ; 328125 ;
Abstract
In a device of the type in which the output voltage derived from the source of a MOS field-effect transistor is varied in response to the voltage across a non-polarized capacitor connected to the gate of the field-effect transistor, positive and negative inputs are provided by two switching elements which are controlled in response to small DC signals. The device functions as a variable resistor, and is adapted to be remotely controlled.