A device comprising a keyboard and a keyboard for detecting two simultaneously pressed keys

摘要

The apparatus includes a keyboard formed by a plurality of respective keys (K1 . K7) designated by one or more electrical contacts (I1, . I7) and formed by a detection device for detecting simultaneously pressed keys . This detection device;A network of registers R1 . R6 connecting the contacts I1, ., I7,;A generator for generating an electrical magnitude (I5, I6) for supplying a first electrical magnitude to an end of the network,;A meter for measuring a second electrical magnitude (I8, I9) located around said end, and;-a metering analyzer (25) for determining the key pressed by the function of the indication generated by said meter.;The present invention is applied to a keyboard of a cellular telephone.