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. 17, 1998
Filed:
Aug. 27, 1997
Jean-Claude Perraud, Saint Aubin/Mer, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
The invention relates to a voltage control means provided with a first and a second transistor T1 and T2 constituting a differential pair, the base of the first transistor T1 being intended to receive a reference voltage Vref, the base of the second transistor T2 being intended to receive a predetermined fraction Vs of a voltage applied to a power supply terminal VDD, and also provided with a first current mirror M1 and a second current mirror M2, each having its input connected to the collector of one of the transistors and its output connected to the collector of the other transistor, the output current of each mirror being K times larger than the input current. According to the invention, a resistor R is inserted in the connection between the emitters of the first and second transistors T1 and T2, and the voltage control means is provided with injection means for injecting into the collector of each transistor a current equal to Q times its own bias current, in which Q is a predetermined real number, and signalization means allowing supply of a current Iout at an output terminal, which current is proportional to the input current of one of the current mirrors M1 and M2.