Koppeln eines Schaltarrays

Details

Veröffentlichungs-Nr.

EP2416587

Aktenzeichen

EP10251400

Anmeldetag

5. August 2010

Veröffentlichung

3. April 2013

Erteilung

3. April 2013

Rechtsraum

EP

IPC

H04Q3/52

Abstract

An interface circuit (100) for a switch array (10) having an array of switches (S ij , i=1...4, j=1...3), each closeable to couple a row conductor of a plurality of row conductors (X 1 ...X 4 ) to a column conductor of one or more column conductors (Y 1 ...Y 3 ), comprises a current generator (20) and a current detector (30). The current generator (20) has a plurality of row interface ports (24a...24d) for coupling to different ones of the row conductors (X 1 ...X 4 ) and is arranged to generate a switch array current (I M ) for coupling to the row interface ports (24a...24d), the switch array current (I M ) having a different one of a plurality of different switch array current magnitudes (M1...M4) for different ones of the row interface ports (24a...24d), and generate one or more reference currents (I R1 ...I R5 ) each having a different reference current magnitude (R1...R5). The current detector (30) has one or more column interface ports (32a...32c) for coupling to the one or more column conductors (Y 1 ...Y 3 ) and is arranged to detect the switch array current (I M ) flowing at any one of the one or more column interface ports (32a...32c), and generate a row indication indicative of which of the row conductors (X 1 ...X 4 ) a closed one of the switches (S ij , i=1...4, j=1...3) is coupled to by determining which one of the switch array current magnitudes (M1...M4) the detected switch array current (I M ) has by comparing the detected switch array current (I M ) with the one or more reference currents (I R1 ...I R5 ).

Anmelder

Firma

ST-Ericsson SA

Land

🇨🇭 Schweiz

Fachgebiete