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. 31, 2004
Filed:
Apr. 18, 2003
Applicant:
Inventors:
Assignee:
Freescale Semiconductor, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/10 ; G05F 3/02 ;
U.S. Cl.
CPC ...
G05F 1/10 ; G05F 3/02 ;
Abstract
A switched capacitor current reference circuit generates an almost constant reference current across the parameters of process, voltage and temperature. A reference voltage is generated within the circuit, which eliminates the need for an external reference voltage. The reference current is generated by applying the reference voltage across a resistor emulated with a pair of switched capacitor circuits.