| 摘要 |
A circuit and method for controlling the speed of operation of a servo motor, wherein multiple speeds of operation can readily be controlled. A non-linear ramp voltage is generated in response to a first set of clock signals produced in response to electrical pulses from a tachometer coupled to the servo motor. A second set of clock pulses, also generated by the tachometer pulses, controls periodic sampling of the non-linear ramp voltage at various points along the ramp as a function of the desired speed of operation.
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