Key input circuit

Details Key input circuit Key input circuit

G - Physics

08

B

340/181

G08B 1/08 (2006.01) H03M 11/20 (2006.01)

Patent

CA 1134925

ABSTRACT OF THE DISCLOSURE A key input circuit is disclosed, in which it is detected that a key switch is pushed down, and the supply of a key scanning signal to a key matrix switch group is started by the detected output, while it is detected that the key switch is released from being pushed down, and the supply of the key scanning signal to the key matrix switch group is stopped by the second detected output.

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