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:
Dec. 12, 2000
Filed:
Dec. 08, 1999
Applicant:
Inventor:
Paul Moraghan, Chicago, IL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ; G05F / ;
U.S. Cl.
CPC ...
323277 ; 323312 ;
Abstract
A current through a transistor having a drain and a source is sensed using a resistor, and first and second current sources. The resistor is responsive to the first current source to establish a reference voltage between a first terminal and a second terminal. The second terminal of the resistor is coupled to the source of the transistor. The second current source is current-controlled by the first current source and has a current gain inversely related to a voltage between the drain of the transistor and the first terminal of the resistor.