Key input device

Details Key input device Key input device

H - Electricity

03

M

340/175, 354/236

H03M 11/24 (2006.01)

Patent

CA 1293065

ABSTRACT OF THE DISCLOSURE In a key input device, the depression of any one of keys of a keyboard applied to same voltage to one of a plurality of analog-digital conversion input terminal contacts connected to an analog-digital conversion input terminal and one of a plurality of ordinary input terminal contacts each connected to one of a plurality of ordinary input terminals so that in accordance with the resulting analog-digital input terminal voltage and ordinary input terminal voltage, a microcomputer discriminates the depressed key.

549564

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