| 摘要 |
A synchronized boosted voltage generator includes a pump controller for receiving an externally applied clock signal and an externally applied control signal, and outputting a charging control signal, a precharging control signal and a charge transfer control signal, a pumping capacitor for receiving the charging control signal and charging a node, a precharge circuit for receiving the precharging control signal and clamping a potential at the node so as not to fall below a predetermined voltage, a charge transfer transistor for transferring to a load the potential charged on the node and the pumping capacitor, respectively, and a charge transfer circuit for receiving the charge transfer control signal and outputting a pumping control signal for controlling the charge transfer transistor. The generator employs an internal clock signal generated by a ½ frequency divider from an externally applied clock signal, whereby a fixed duty cycle clock is to generate a stable boosted-voltage.
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