An Isolated DC Current Sampling Circuit
Cheng Hongbing · Telecom Power Technology · 2009
In this paper,a simple DC current sampling circuit which is isolated from monitor circuit is introduced.In this circuit,utilizing the conduction resistance of MOSFET as sampling resistor,the current is amplified by single supply amplifier,then converted to pulse signal by V-F converter,finally the pulse signal is sent to monitor circuit by optocoupler.The feasibility of the design is verified by experiment.