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:
Jan. 12, 1993
Filed:
Oct. 04, 1991
Jean-Claude Perraud, St. Aubin/Mer, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
A current source which provides a given ratio (G) of an output current (I) to an input current (i). The current source includes a first series combination of a first resistor (R.sub.1) connected in series with the main current path of a first transistor (T.sub.1) and a second series combination of a second resistor (R.sub.3) connected in series with the main current path of a second transistor (T.sub.2). The first and second transistors (T.sub.1, T.sub.2) form a current mirror circuit. A current equalizer is coupled to the current mirror circuit in such a way as to produce in the first series combination an equalizing voltage drop equal to ##EQU1## i.sub.s1 and i.sub.s2 denoting the characteristic current constants of the first and second transistors (T.sub.1, T.sub.2).