On performance limits of switched-capacitor multi-phase charge pump circuits. Remarks on papers of Starzyk et al.

Important contributions on multi-phase charge pumps of Starzyk et al posed a question about a maximum voltage gain in a circuit containing k capacitors. We comment on Starzyk's conjecture of 2
^k-1
gain and give general limit value theorems. We conclude that Starzykpsilas conjecture is true however, in general terms it gives a condition that is necessary but not sufficient. A note on circuit realizations is given.