| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that there is an adverse influence such as noise when maximum power is not necessary if a voltage pump of a size enough to supply necessary power is arranged. SOLUTION: A voltage pump for the dynamic random access memory is provided with a variable pump for supplying power at a variable level in response to a clock signal and an enable signal generated by the dynamic random access memory, an oscillator for generating the clock signal, and a regulator for generating a first signal to control the oscillator means. The variable pump includes a plurality of first independent pump circuits, and a plurality of second independent pump circuits. Each pump includes two substantially similar pump parts cooeperatively operated in response to the clock signal. COPYRIGHT: (C)2006,JPO&NCIPI |
