Coded data generation or conversion – Analog to or from digital conversion – Nonlinear
Patent
1996-05-24
1998-05-12
Hoff, Marc S.
Coded data generation or conversion
Analog to or from digital conversion
Nonlinear
341118, H03M 106
Patent
active
057512353
ABSTRACT:
A joystick system is designed to provide a modified digital representation of the setting of a joystick potentiometer. The system operates to compensate for non-linearities and offsets in the joystick response, or may be used to enhance or vary the joystick response to a non-linear form. This is accomplished by supplying the output voltage of the joystick to an analog-to-digital converter, the output of which then is supplied to a lookup table. The lookup table output is provided to a counter. In one mode of operation, the counter counts down to zero at some multiple of a sample rate. When the counter reaches a zero count, the time interval representative of the joystick position is indicated; and the corrected or enhanced position is indicated by this output. In an alternative mode of operation, the counter is used as a data latch; and the corrected or enhanced joystick position is digitally read directly from the data latch where the data remains until the next sample cycle from the joystick position occurs.
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Harrow Scott
Hicok Gary
Potts Kenneth
Hoff Marc S.
Ptak LaValle D.
VLSI Technology
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