Patent ID: 8030988

Claim:
An electrical apparatus comprising: a plurality of charge pump segments, each segment having a respective input terminal and a respective output terminal, the plurality of segments coupled electrically in series to form a charge pump chain; a voltage input node at the input terminal of an initial segment of the chain; a first voltage output node at the output terminal of a final segment of the chain; a second voltage output node at the output terminal of a selected non-final segment of the chain; a first voltage regulation circuit communicatively coupled with the first voltage output node and the final charge pump segment and configured to regulate the final charge pump segment to maintain a voltage level at the first voltage output node; a second voltage regulation circuit communicatively coupled with the second voltage output node and the selected non-final segment of the chain and configured to regulate the selected non-final charge pump segment to maintain a voltage level at the second voltage output node; and a circuit having a switch coupled to the first voltage output node, the circuit configured to selectively supply current to the selected non-final segment of the chain from the output terminal of the final charge pump segment of the chain.