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I think you need to explain what you mean by 'leakage' to get a meaningful answer. To some of us it means keeping water tanks topped up, to others it means pico-Amp carriers jumping depletion regions in semiconductors.
Deterministic (therefore matched) leakage can be
cancelled / compensated by simple circuit design but
anomalous leakage, operating point driven leakage
creep and so on can't, so much.
You can find some old-timey bipolar op amps that do
input bias current cancellation, etc. in the circuit design.
Although I reckon I didn't specify correctly the type of leakage I think @betwixt it is a bit difficult on an electronics forum be referring to water tanks and etc.
In regards to the question itself, I am talking about the leakage provoked by big devices like power switches or pass devices or even transistors part of any kind of circuit for example a push-pull stage etc.
Questionable. You didn't elaborate the question much, except for specifying the application range. The question is still too general I think.
Any transistor shows some leakage current which is unwanted in case of doubt. But compensation means will application dependent. Available building blocks are e.g. current measurement, controllable current source, short switch.
Lets suppose a pass device of an LDO. If you have leakage in there, due to its size, the output will be permanently pull-up at no load. I guess there isn't any other example better than this one. BR
Lets suppose a pass device of an LDO. If you have leakage in there, due to its size, the output will be permanently pull-up at no load. I guess there isn't any other example better than this one. BR
Yes, and many datasheets specify a minimum load current
(leaving you, the user, to "compensate" the leakage per
advice).
Some LDOs have a low side (sink) device, especially ones
that are meant to offer good HF PSRR at light loads. A
Class B or AB-ishh arrangement. This is less about
"compensation" of a leakage, more about having an
ability to keep Zout sane as regards loop compensation
while load current / impedance swings wide.
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