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:
Sep. 23, 2003
Filed:
May. 28, 2002
Jeffrey C. Gealow, Andover, MA (US);
Thomas J. Barber, Jr., Medford, MA (US);
Paul F. Ferguson, Jr., North Andover, MA (US);
Xavier S. Haurie, Arlington, MA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
An offset calibration system includes an analog to digital converter having a first full-scale range with a first offset compensation circuit; a digital to analog converter having a second full-scale range with a second offset compensation circuit; the digital to analog converter having its output connected to the input of the analog to digital converter during calibration of the digital to analog converter; and a range adjustment circuit for accumulating a predetermined number of analog to digital output values and dividing the accumulated values by a preselected power of 2 in the ratio of the voltage corresponding to the analog to digital converter least significant bit to the voltage corresponding to the digital to analog converter least significant bit.