Motor driving circuit

A motor driving circuit, providing a driving current to drive a motor, comprising:

• a driving-stage circuit, including a plurality of inverters connected in parallel, wherein each inverter includes an upper-side transistor and a lower-side transistor;
• a system control circuit, providing a duty cycle signal;
• a signal generation circuit, connected between the system control circuit and the driving-stage circuit, generating a plurality of pulse width modulation signals according to the duty cycle signal to control the turning on and the turning off of the upper-side transistor and the lower-side transistor of each inverter such that the driving current is provided to drive the motor;
• and
• a plurality of zero-crossing detectors, connected between the driving-stage circuit and the signal generation circuit, detecting a current flowing through a node between the upper-side transistor and the lower-side transistor of each inverter and accordingly generating a current sensing signal;
• wherein the signal generation circuit adjusts the width modulation signals according to the current sensing signals, such that an equivalent duty cycle of the driving-stage circuit is not related to a dead time of the motor driving circuit and a distortion of the waveform of the driving current is prevented.