Digital joystick interface circuit

Details Digital joystick interface circuit Digital joystick interface circuit

1996-11-20

1999-02-02

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

327100, 327142, 345161, 463 38, H03L 500

Patent

active

058670513

ABSTRACT:
A digital joystick interface circuit includes a trigger detecting circuit, a flip-flop circuit and a value comparator. The trigger detecting circuit is provided for processing the changes of the voltage or electric currents of a game interface so as to reset the trigger signal of the interface. The flip-flop circuit controls the charge cycle of the game port and causes a counter to start counting during the time delay of the charge cycle. The value obtained by the counter after reading the joystick's coordinate signal or switch signal is compared with that of the comparator. When the two values are equivalent, the flip-flop circuit will reset, achieving coordinate addressing.

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