| 摘要 |
Disclosed is a dual mode charge-pump circuit (400) and associated method and apparatuses for providing a plurality of output voltages (V0Ut+, V0Ut-), using a single flying capacitor (cf), the circuit comprising, a network of switches (410) that is operable in a number of different states and a controller (420) for operating said switches in a sequence of said 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, in a first mode and positive and negative output voltages each up to substantially said input voltage (+VDD) in a second mode.
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