Driving circuit and motor system

The invention provides a driving circuit, a voltage level shift unit and a motor system, in particular relates to a driving circuit which includes an input voltage source group which is used to provides the input voltage source group, a reference voltage source which is used to provides a reference voltage, a voltage level shift unit which is used to increase the level of one of the input voltagesource group to the level of the reference voltage, an operation unit which is used to receive the reference voltage and the input voltage source and to selectively output a control voltage, a security unit which is used to guide the control voltage to a ground terminal, and a voltage output terminal which is used to receive the control voltage and to output an output voltage. The driving circuit, the voltage level shift unit and the motor system of the invention have a voltage stabilization unit which can avoid the current leakage and level instability when the circuit is electrified.