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. 20, 2004
Filed:
Aug. 27, 2002
Applicant:
Inventor:
Li-Te Wu, Hsinchu, TW;
Assignee:
Winbond Electronics Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/10 ;
U.S. Cl.
CPC ...
G05F 1/10 ;
Abstract
A stable current source circuit with a compensation circuit, comprising: a PMOS current mirror, connected to a power supply so as to output a stable current; an NMOS current mirror, connected to a third bipolar junction transistor and a fourth compensation resistor; a third bipolar junction transistor, the emitter of the third bipolar junction transistor connected to the NMOS current mirror and both of the base and the collector grounded; and a fourth compensation resistor, interconnected between the NMOS current mirror and the compensation circuit. Alternatively, a compensation capacitor can be added so as to obtain better stability.