Fix output current independent of the load

[Dino1400]

Hello,

I have circuit that generate different waveforms with frequencies from 20Hz to 1MHz the current without load is 100uA this current increase as the load circuit changes.

any suggestion on how to have this current independent on the load

like sample mirror circuit with few component

Thank you all

 

[throwaway18]

The question is unclear.

Resistive load only or partially capacitive/inductive load?

Average/rms current over the repetition of a waveform or instantaneous current?

If you have a resistive load then when the voltage goes up the current goes up,
if you want a fixed instantaneous current then the voltage must stay the same,
not be a varying waveform.

If your waveform has a fast rising or falling edge and your load is
capacitive then limiting the current means the voltage has to rise slowly
so your waveform will be different.

 

[Dino1400]

the load is the skin which is a mixed of capacitance and resistance if you can say that. the rising and falling edge will depends on the frequency. And the Average/rms current over the repetition of a waveform fix for a certain period of time say 30 minutes.