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:
Mar. 25, 1986
Filed:
Mar. 23, 1983
Applicant:
Inventor:
Hugh McPherson, Tweeddale, GB;
Assignee:
Ferranti plc, Cheshire, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
307493 ; 307501 ; 307304 ; 330277 ; 330279 ;
Abstract
A temperature-independent gain control circuit includes a dual-gate MOSFET having the input signal applied to one gate and a resistance connected to the source. Control means are provided which are responsive to a control voltage to control the voltage between the other gate of the MOSFET and the end of the resistance remote from the source in such a manner as to maintain the drain current of the MOSFET proportional to the control voltage.