| 摘要 |
<p>A charge pump circuit for providing a split-rail voltage supply is disclosed. The circuit comprises first and second flying capacitors Cf1, Cf2 and a network of switches S1 - S8 that is operable in a number of different states. A controller 420 operates the switches in a sequence of states so as to generate positive and negative output voltages Vout+, Vout- together spanning a voltage approximately equal to the input voltage +Vdd and centred on the voltage at the common terminal N11.</p> |
