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:
Mar. 18, 1997
Filed:
Oct. 05, 1995
Raymond L Barrett, Jr, Ft. Lauderdale, FL (US);
Barry Herold, Boca Raton, FL (US);
Grazyna A Pajunen, Delray Beach, FL (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
A current mirror (100) has an input stage (104) and an output stage (106), both preferably employing FET's. (Field Effect Transistors) An amplifier (102) equalizes drain-to-source voltages between FET's in the input and output stages to provide a higher output impedance. A resistance (R1), coupled in series with an FET in the output stage (106), provides degenerative feedback. A reference current generator (400) is constructed of two such current mirrors, one being the compliment of the other, to provide one or more stable reference currents. Loop gain of the reference current generator (400) is greater than one at start-up, but degenerative feedback reduces the loop gain to one at a predetermined stable operating point.