Circuit for improving stability of backfeed of driving power supplies

A circuit for improving the stability of the backfeed of driving power supplies including a reference resistor, a current measuring resistor, a comparator, a logic circuit, a driving circuit, and a load, one end of the reference resistor is connected to an input power supply, the other end of the reference resistor is connected to an input end of the comparator, one end of the current measuring resistor is connected to the input power supply, the other end of the current measuring resistor is connected simultaneously to the other input end of the comparator and an output end of the load, an input end of the load is connected to an output end of the driving circuit, the circuit for improving the stability of the backfeed of driving power supplies is also characterized in including a control circuit, a current limiting resistor, an energy storage capacitor, and a resistor for generating a voltage difference of the residual current, an output end of the comparator is connected to one end of the current limiting resistor, the other end of the current limiting resistor is simultaneously connected to one end of the resistor for generating a voltage difference of the residual current and an input end of the logic circuit, a backfeed voltage between the current limiting resistor and the resistor for generating a voltage difference of the residual current is directed to the logic circuit, the other end of the resistor for generating a voltage difference of the residual current is connected to one end of the energy storage capacitor, the other end of the energy storage capacitor is grounded, an input end of the driving circuit is connected to an output end of the control circuit, an input end of the control circuit is connected to an output end of the logic circuit.