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:
Apr. 06, 2004
Filed:
Feb. 25, 2003
Applicant:
Inventor:
Bengt Erik Jonsson, Spånga, SE;
Assignee:
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M 1/10 ;
U.S. Cl.
CPC ...
H03M 1/10 ;
Abstract
An A/D converter calibration apparatus includes a set of operating condition parameter sensors ( ) for detecting the current operating conditions, which are represented by parameters x , . . . , x . The measured parameters are forwarded to an operating conditions change detector ( ), which calculates a change measure and determines whether this measure exceeds a predetermined change threshold. When a change exceeding the threshold has been detected, a calibration trigger signal CAL_TRIG is passed to a calibration control unit ( ), which initiates a background calibration sequence.