Hi, There could be several reasons for this. Can you tell me how you are measuring this current, please? Are you using a series resistor and measuring the voltage across it? What is the value of this resistor and the level of current? Is it a simple DC current or a mixture of AC & DC? Are you using a x10 probe to connect across the series load resistor or using a direct x1 connection? Is the series resistor in the supply lead or in the return lead of the circuit? Regards, PeterF.