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. 12, 1986
Filed:
May. 20, 1985
Bruce D Rosenthal, Sunnyvale, CA (US);
Richard L Gray, Palo Alto, CA (US);
Teledyne Industries, Inc., Mountain View, CA (US);
Abstract
An adjustable current mirror, responsive to a single polarity balance control signal that may be derived using feedback, is described. The current mirror amplifier comprises first means for providing a first current path, the first means including reference transistor means for providing a current level control signal, issued relative to a reference potential, that corresponds to the current level of the first current path, second means for providing a second current path, the second means including current control transistor means for controlling the current level of the second current path, the current control transistor means being responsive to the current level control signal, and adjust transistor means, provided in series with the reference transistor means in the first current path, for adjusting the current level control signal by effectively modifying the reference potential, seen by the first means, in response to the balance control signal. The current balance between the first and second conduction paths may be directly modified by the resulting effective adjustment of the transconductance of the transistor means in the first conduction path with minimal addition of circuit components and a corresponding minimal impact on nominal current mirror amplifier circuit operation.