| 摘要 |
Apparatus comprising a charge pump ( 20 ) with multiple independently regulated outputs (V 1 , V 2 ) for providing different voltage levels at each of said outputs. The charge pump ( 20 ) comprises a low voltage input ( 12 ), on/off regulation ( 30 ), and at least two charge stages ( 11, 21 ) which arc arranged in a cascaded manner. Each charge stage ( 11, 21 ) comprises a stage capacitor ( 16, 26 ), a switch (S 1 , S 3 ), and a buffer ( 15, 25 ) for pumping a bottom plate of the stage capacitor ( 16, 26 ).
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