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. 12, 1985
Filed:
Dec. 02, 1983
Atsushi Ogawa, Yokohama, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A current mirror circuit having a good input-output current characteristic and operable by a relatively small power supply voltage. The current mirror circuit includes a first resistor connected to a current input circuit, a first transistor whose emitter is connected to the junction of the first resistor and the current input circuit, means for providing a voltage offset, a second resistor connected in series with the base of the first transistor through the voltage offset providing means, a first constant current source connected to the collector of the first transistor, a second constant current source connected to the junction of the base of the first transistor and the voltage offset providing means, and a second transistor whose base is connected to the collector of the first transistor and whose emitter is connected to the junction of the voltage offset providing means and the second resistor to provide a feedback loop. The output current of the current mirror circuit is taken from the collector of the second transistor.