Patent ID: 6297751
Filing Date: 2001-10-02
Classification: G06F

Abstract:
An interface between a joystick device having a first source voltage and a processor, comprising:a Resistor-Capacitor (RC) network, connected to the joystick device, said RC network having a capacitor that generates an analog joystick position measurement signal; andan interface circuit having a second source voltage that is lower than the first source voltage, includinga buffer circuit, in a first operation mode of said interface, receiving said analog joystick position measurement signal, outputting a first logic state as a digital signal before said analog joystick measurement signal exceeds said predetermined threshold, and outputting a second logic state as said digital signal after said analog joystick measurement signal exceeds said predetermined threshold; anda pulse generator generating a pulse based on said digital signal in said first operation mode of said interface, a width of said pulse representing a coordinate position of said joystick device, the capacitance value of said capacitor being a function of said predetermined threshold that prevents deviation of the width of said pulse from expected values.