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:
Nov. 20, 1990
Filed:
Jan. 17, 1990
Applicant:
Inventor:
Arnoldus J Boudewijns, Eindhoven, NL;
Assignee:
U.S. Philips Corp., New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ; H03K / ;
U.S. Cl.
CPC ...
307304 ; 307279 ; 3072968 ; 307304 ; 365154 ;
Abstract
An integrated variable resistor in MOS technology includes two parallel-connected transistors (T1, T2) whose electrodes are floating relative to the substrate (8). Its resistance is controlled by means of current sources (3, 4, 5, 6) whose current flows through the transistors (T3, T4) arranged as resistors. The body effect in the transistors (T1, T2) is compensated for by an equally large body effect in the transistors (T3, T4).