How difficult is it to make a compact transformerless high voltage current and voltage source? Is it possible to adapt the current topology with properly rated components and achieve this affect or modify existing low voltage techniques with such components?
For example, suppose I want a current source of around 1mA with a1000V compliance. Could I adapt an LM317(or variant) to drive a capable BJT for such loads?
Shows many basic topologies for current sources and it is my belief that ideally they all work for any voltage and current. Is this correct? Is my problem dealing simply with component capabilities and isolation issues?
Similarly, for switched mode topologies such as a buck-boost if I were to use capable components(high voltage ratings) and diligently deal with isolation issues could I expect to have success?
Potentially my issues lay with finding the properly rated components or finding exotic methods to modify existing components for such capabilities?
Alternatively, are there any high voltage IC voltage and current sources?