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. 15, 1990
Filed:
Jul. 05, 1989
Applicant:
Inventors:
Rinaldo Castello, Arcore, IT;
Marco Ferro, Turin, IT;
Franco Salerno, Alpignano, IT;
Lucano Tomasini, Avullo, IT;
Assignee:
SGS-Thomson Microelectronics S.p.A., Catania, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330253 ; 330257 ;
Abstract
The source is apt to generate a fully-differential reference voltage at the output terminals, whereto precisely-balanced loads are applied. The voltage reference is obtained from a bandgap voltage source fed with currents proportional to the temperature, in order to minimize thermal voltage variations. Suitable circuits for starting the normal source operation after switching on are also provided.