Patent ID: 7969114
Filing Date: 2011-06-28
Classification: G01D

Abstract:
1. A motor driving system compatible with different types of signals, the system comprising: at least one differential amplifier configured to receive and process one of a pair of differential digital pulse signals from a first encoder, or a pair of differential analog signals from a second encoder, and output a first count pulse signal or an analog signal correspondingly; at least one comparator configured to transmit the first count pulse signal from the at least one differential amplifier to an external computing device, or compare the analog signal from the at least one differential amplifier with a reference signal to get a second count pulse signal and transmit the second count pulse signal to the computing device, wherein the first and second and count pulse signals are configured to indicate the speed of the motor by being counted by the computing device; and a transmitting device configured to convert a pair of differential reference digital signals from one of the first or second encoders which is provided to generate differential signals to the at least one differential amplifier to a reference digital signal to indicate a zero position on the encoder correspondingly, or convert a pair of data signals from a second encoder to a binary code to indicate an actual position of the motor, wherein the digital signals and the binary code are received by the computing device.