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. 06, 1984
Filed:
Feb. 26, 1982
Eric D Joseph, Mesa, AZ (US);
Robert B Davies, Tempe, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A circuit for providing a current at an output thereof of a predetermined value which has excellent ripple rejection characteristics whereby the magnitude of the current is maintain substantially constant with variations in the voltage supply applied thereto. The current source includes first and second complementary current mirror circuits interconnected such that the second current mirror sinks the current sourced from the first current mirror. A feedback loop latches the circuit into a stable operation and senses any difference current between the two current mirror circuits caused by perturbations of the supply voltage to produce feedback to maintain the circuit at its quiescent operating point.