For an experimental thermo-electric generator (TEG), developed by a colleague for low-power energy harvesting, it is possible to achieve an output power of 400 uW at the maximum power point. The voltage is 20 mV and the current is 20 mA.
This voltage needs to be switched up to at least 1.2 V, preferably 3.3 V.
How would you choose to proceed to switch up such a low voltage, also considering a need for maximum power-point tracking (could be simply current-limiting the input)?
It might not be possible, but in that case, what would you consider the minimum voltage, and how would you answer question 1 with that minimum voltage?