Application of one kind of ripple cancellation circuit and a control circuit which is led

The present invention discloses a ripple removing circuit and LED control circuit applied thereto, LED drive circuit receives AC input, and converts it to DC with ripple, the LED load, is connected to the DC with ripple positive terminal, the negative terminal of the load is connected to the LED load adjustment tube first end, second end of the adjustment tube is connected to the ground; control adjustment tube end to be connected with a first capacitor, a first capacitor and a current generating circuit and the current a filter circuit formed of a source, a time constant much greater than the frequency cycle, the voltage on the first capacitor is approximately no ripple DC voltage regulator such that the current through the direct current is approximately no ripple in order to achieve through the LED load the current ripple is reduced, the input current ripple is the ripple voltage regulator of the drain terminal of the source, the DC component to control a drain-source voltage ripple regulator by setting the value of the current source input capacitance by transformation, according to the present invention ripple cancellation effect is remarkable, fast response system, and its low cost of implementation.