Patent ID: 9419515
Filing Date: 2016-08-16
CPC Classification: H02M,H03K,H03L

Claim Text:
1. A charge pump circuit, comprising: a first circuit powered by a first supply voltage and configured and arranged to adjust a voltage of an output in response to first and second sets of control signals, the first circuit including a set of transistors having respective switching voltages; a control circuit powered by a second voltage that is less than the first supply voltage, the control circuit configured and arranged to generate the first set of control signals as a function of a voltage of a first command signal and generate the second set of control signals as a function of a voltage of a second command signal; and a voltage shifting circuit configured and arranged to bias voltages of the first and second sets of control signals relative to the switching voltages; wherein the first circuit includes: further comprising a compensation circuit configured and arranged to reduce power consumption of the unity gain buffer by injecting a compensation signal into the respective output node of the second switching circuit, the compensation signal having a current that is complementary to a current provided to the respective output node by the second switching circuit.