EP 0976203 A1 20000202 - DATA COMMUNICATIONS TERMINAL AND METHOD OF ADJUSTING A POWER SIGNAL GENERATED THEREFROM
Title (en)
DATA COMMUNICATIONS TERMINAL AND METHOD OF ADJUSTING A POWER SIGNAL GENERATED THEREFROM
Title (de)
DATENÜBERTRAGUNGSENDGERÄT UND VERFAHREN ZUM EINSTELLEN EINES DAVON GENERIERTEN LEISTUNGSSIGNALS
Title (fr)
TERMINAL DE COMMUNICATION DE DONNEES ET PROCEDE DE REGLAGE DU SIGNAL DE PUISSANCE PRODUIT PAR CE TERMINAL
Publication
Application
Priority
- US 9827003 W 19981218
- US 2582698 A 19980219
Abstract (en)
[origin: WO9943096A1] A data communications terminal (102) includes an antenna circuit (106) for delivering a power signal to a portable data device. The terminal further encompasses a method for automatically adjusting the power seen by the portable data device without any communications feedback from the portable data device by monitoring an impedance characteristic for the antenna circuit. When a change in the monitored impedance characteristics is detected, the data communications terminal adjusts a power level for the power signal delivered to the portable data device.
IPC 1-7
IPC 8 full level
G01R 27/02 (2006.01); G01R 27/04 (2006.01); G06K 7/00 (2006.01); H04B 1/59 (2006.01)
CPC (source: EP KR)
G06K 7/0008 (2013.01 - EP); G06K 19/0701 (2013.01 - EP); G06K 19/0715 (2013.01 - EP); H04B 1/59 (2013.01 - KR)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
WO 9943096 A1 19990826; AU 2004099 A 19990906; BR 9808937 A 20000801; CA 2287441 A1 19990826; CN 1252908 A 20000510; EP 0976203 A1 20000202; EP 0976203 A4 20020828; JP 2001520855 A 20011030; KR 20010006519 A 20010126; TR 199902594 T1 20000721
DOCDB simple family (application)
US 9827003 W 19981218; AU 2004099 A 19981218; BR 9808937 A 19981218; CA 2287441 A 19981218; CN 98804324 A 19981218; EP 98964796 A 19981218; JP 54250099 A 19981218; KR 19997009609 A 19991018; TR 9902594 T 19981218