Abstract: A high-speed sampling circuit is disclosed which comprises a sampling module, a latch module, a first control module, a second control module, and a third control module, the sampling module is used to amplify a differential input signal; the latch module is used to latch the differential output signal of the sampling module; the first control module is used to control the sampling module under a first clock signal; the second control module is used to control the latch module under a second clock signal; the third control module is used to control the output of the differential output signal under the second clock signal.

Abstract: A LED dimming device, and a LED dimming and a driving circuit using such LED dimming device are discussed. In present embodiment, the LED dimming device multiplexes an inputting switch and/or a sampling module of the LED driving circuit for dimming. such LED dimming device will not affect the sine waves of input current, in such a way, power factor and work efficiency will be increased while the harmonic coefficient and interference signal will be reduced.

Abstract: A LED dimming device, and a LED dimming and a driving circuit using such LED dimming device are discussed. In present embodiment, the LED dimming device multiplexes an inputting switch and/or a sampling module of the LED driving circuit for dimming. such LED dimming device will not affect the sine waves of input current, in such a way, power factor and work efficiency will be increased while the harmonic coefficient and interference signal will be reduced.