Shenzhen Pango Microsystems Co., Ltd.

Fremont Micro Devices (sz) Limited

Guangyao You

Matthew Man Ho Ku

Yue Zheng

Yuanjun Liang

Weiming Liao

Lifang Guo

A high-speed sampling circuit is disclosed which comprises a sampling module for amplifying a differential input signal; a latch module for latching the differential output signal of the sampling module; a first control module for controlling the sampling module under a first clock signal; a second control module for controlling the latch module under a second clock signal; a third control module for controlling control the output of the differential output signal under the second clock signal. The high-speed sampling circuit of the disclosure, after sampling the differential input signal, the sampling module outputs it to the latch module and controls the latch module to output the differential output signal, compared to the existing two-stage sampling module, it saves the transmission delay of the two-stage sampling module and can improve the performance of the high-speed sampling band of the signal.

High speed sampling circuit

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.

LED dimming device and LED dimming and driving circuit

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Shenzhen, China

Guangyao You