Sinusoidal wave direct current volume sampling circuit

The utility model relates to a power technology field, especially a sinusoidal wave direct current volume sampling circuit compares with prior art, the sinusoidal wave direct current volume sampling circuit's sinusoidal sample signal passes through the dc component of second order RC low pass filter extraction signal, through operational amplifier enlarge with the total mark after, obtain low ripple coefficient's DC signal, for the sampling of the sinusoidal wave direct current volume of contravariant provides the mode that the high speed is convenient, the output of sampling module both can directly have been received the hardware control loop and done the negative feedback, also can offer control chip such as DSP, MCU and do the direct of sinusoidal wave direct current volume and judge. Have the modularization, the component is few, simply easy -to -use, longe -lived, interference immunity is strong, advantage such as high -speed, with low costs.