Leakage independent vry low bandwidth current filter

A system for filtering noise in a current filter circuit, the system comprising:

• a source transistor comprising a drain, a gate, and a source, wherein the source of the source transistor is coupled to a reference voltage terminal, the gate of the source transistor is coupled to the gate of a mirror transistor, and the drain of the source transistor is coupled to a reference current source;
• the mirror transistor comprising a drain, a gate, and a source, wherein the source of the mirror transistor is coupled to the reference voltage terminal, the gate is coupled to the gate of the source transistor, and the drain is coupled to a load;
• and
• a low pass filter for filtering noise in the current filter circuit, the low pass filter coupled between the drain of the mirror transistor and the reference voltage terminal, the input to the low pass filter being the drain of the mirror transistor and output being coupled to gate terminal of the mirror transistor and the source transistor.