Patent ID: 8258730

Claim:
A motor driving circuit capable of outputting a dual frequency generator (FG) signal, including: a control unit electrically connected to a first Hall unit, the control unit being configured to generate a first FG signal based on a Hall signal sent by the first Hall unit; a second Hall unit configured to detect a change in magnetic fields to generate a second FG signal; and a logic unit electrically connected to the control unit and the second Hall unit, the logic unit being configured to perform a logic operation to the first and second FG signals to thereby convert them into a dual FG signal; and wherein the logic unit comprises a XOR gate having a first pin, a second pin, a third pin, a fourth pin and a fifth pin, and wherein the first pin is coupled to a first terminal of a first resistor, a second terminal of the first resistor is coupled to the fifth pin and a reference voltage, the third pin is coupled to a grounding terminal, the fourth pin is coupled to a first terminal of a second resistor, a second terminal of the second resistor is coupled to the fifth pin.