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:
Apr. 03, 1990
Filed:
Sep. 20, 1988
Applicant:
Inventor:
Serge Ramet, Grenoble, FR;
Assignee:
SGS-Thomson Microelectronics S.A., Gentilly, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341140 ; 341144 ; 3072961 ; 323226 ;
Abstract
An adjustable current source comprising a bipolar transistor (BT), the base of which receives a signal adapted to approximately set the current which flows therethrough, and a MOS transistor (MT), in series with the bipolar transistor, the gate (G) of which receives an adjustment signal stored by a capacitor (C) connected between its gate and its drain. This current source can be used for forming the upper stages of an auto-calibration digital converter.