| 摘要 |
A driver circuit for powering an electronic device has a voltage source, two charge pump arrangements each having a diode connected in series with a capacitor. The charge pump arrangements are connected to the voltage source and the capacitors are charged, during a first phase, to a positive voltage level approximately equal to the voltage level of the voltage source. Furthermore, a switch is provided for switching the charge pump arrangements to a second phase, whereby they are charged simultaneously, one of the capacitors to a positive voltage approximately twice the voltage level provided by the voltage source and another one of the capacitors to a negative voltage level having a magnitude, which is approximately equal to a magnitude of the voltage source. An improved and cost-efficient driver circuit is thereby provided, having only few components.
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