Optical servo control circuits and methods using pulse width modulation and offset control for driving an electromechanical motor
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United States of America Patent
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Apr 22, 2003
Grant Date -
N/A
app pub date -
Oct 30, 2000
filing date -
Oct 30, 2000
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Abstract
Servo control circuitry 300 includes a digital to analog converter 402 for converting digital servo control data into a pulse width modulated signal. A first conductor transmits the pulse width modulated signal to an external device 409. A second conductor transmits a reference signal derived from the clock signal to external device 409, external device 409 differentially receiving the pulse width modulated signal with respect to the reference signal.
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