Fingerprint Cards Anacatum IP Ab

Allan Olson

David Carling

Hans ThÖrnblom

A fingerprint sensor, comprising fingerprint sensing circuitry configured to sense a fingerprint of a finger, and to provide a representation of the fingerprint; a sensor interface coupled to the fingerprint sensing circuitry, and comprising at least a first input pad for input to the fingerprint sensor of at least a first digital signal, and at least one output pad for output from the fingerprint sensor of a digital data signal encoding the representation of the fingerprint; and IO-voltage determining circuitry coupled to the first input pad and configured to sense a voltage level of the first digital signal, and to determine, based on the sensed voltage level of the first digital signal, a nominal voltage level to use for the digital data signal encoding the representation of the fingerprint.

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Allan Olson