Carroll Touch Inc.

Terrence J Knowles

Del Ogren

A controller for an acoustic wave touch panel includes a signal conditioning circuit that can receive and process X axis and Y axis sense signals from the touch panel where the touch panel can be configured with either one or two transducers per sense axis. The signal conditioning circuit includes a differential amplifier to which simultaneously received X axis and Y axis sense signals are applied to provide common mode rejection. The controller also includes a touch position detector that accurately determines the position and pressure of a touch without jitter, the touch position detector including a software low pass filter and peak detector for analyzing the output of the signal conditioning circuit.

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Hanover Park, IL, United States of America

Terrence J Knowles