Method and apparatus for canceling an offset signal in an electr

Details Method and apparatus for canceling an offset signal in an electr Method and apparatus for canceling an offset signal in an electr

1995-12-22

1998-11-24

Shankar, Vijay

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

345174, 178 1805, 178 1806, G08C 2100, G09G 500

Patent

active

058414274

ABSTRACT:
A method and apparatus for generating an output signal in a digitizer. The method includes the steps of generating a first signal when a user contacts a sensor panel wherein the first signal has a first component and a second component, generating a second signal which is substantially identical to the first component of the first signal, and using the second signal to cancel out the first component of the first signal so as to generate the output signal which is substantially identical to the second component of the first signal.

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Capacitive Touch Panel Using Uniform Resistive Film; Fujitsu-Scientific & Technical Journal, vol. 22, No. 2; Jun., 1986; pp. 124-131 XP000049078; Yoshikawa et al.

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