Inductive current sampling circuit and implementation method thereof

The invention discloses an inductive current sampling circuit, andmainly solves the problems of poor inductive current sampling precision and high circuit cost in the prior art. The current sampling circuit comprises an up-sampling circuit and a down-sampling circuit,anoutput circuitwhich is connected with the up-sampling circuit and the down-sampling circuit,acomparator E1 which is connected withthe up-sampling circuit, a comparator E2 whichis connected with the down-sampling circuit, a digital signal generation module connected with the comparator E1 and the comparator E2, a filter circuitconnected with the digital signal generation module, a negative feedback loop connected with the filter circuit, a voltage division module and an operational amplifier circuit which are connected withthe negative feedback loop, and a current mirror image circuit connected with the operational amplifier circuit, theup-sampling circuit and thedown-sampling circuit. According to the invention, no extra power loss is generated