| 摘要 |
Malfunctioning is prevented with a charge-pump circuit which boosts a voltage in increments of less than power supply voltage. The charge-pump circuit has switches S1, S2 and S3 which connect capacitors 1 and 2 to a pumping node in series or in parallel accordingly to the following control steps.{circle around (1 The switch S2 is turned ON to connect the capacitors 1 and 2 in series while the clock CLK is at L level.{circle around (2 The switch S2 is turned OFF.{circle around (3 The clock CLK is changed to H level.{circle around (4 The switches S1 and S3 are turned ON to connect the capacitors 1 and 2 in parallel.{circle around (5 The switches S1 and S3 are turned OFF.{circle around (6 The clock CLK is changed to L level.
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