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:
Aug. 09, 1983
Filed:
Mar. 12, 1982
Robert A Neidorff, Chandler, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
Two current mirror circuits employing a combination of JFET's and bipolar transistors and a high gain amplifier including one of the mirrors are disclosed. The mirrors each include input and output bipolar transistor with a JFET variable current sink circuit connected across the collector-to-base electrodes of one of the bipolar transistors and a JFET constant current supply is connected to the variable current sink. One of the mirrors further includes a bipolar turn-around circuit connected between the constant current supply and the variable current sink to compensate for otherwise possibly undesirable effects of the base currents of the input and output bipolar transistors.