Jacki
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By the way, regarding the discussion that cascode current source in the charge pump has smaller settling time than the single transistor current source, I can't follow it. In my simulation, it is clear cascode current source has slower response than the single transistor current source, and I think it makes sense because instead of settling one transistor, in cascode current source two transistors need to be settled into saturation region. One more question, how to make the settling time of the current source (from 0 to a precise current value) in the charge pump as fast as possible?
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