hello
i need some help with self biased opamp's LDO
the circuit is here:
- formatting linkcircuit
it is response on load current step below. as you can see, when load drops, the regulator doesn't regulate.
- formatting linkload response
it's retaled to no bias current in M0 so in opamp as you can see there:
- formatting linkM0 current
the problem is how to size transistors to have right current also for low load conditions. how the bias current in M0 is determined in this circuit? how to ensure non-zero current during low load?
regards