| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent generation of noises in a charge pump circuit. <P>SOLUTION: By alternately turning on and off a pair of switches S1, S3 and a pair of switches S2, S4, a power supply -VCC is provided at an output. Constant current circuits CS1, CS2 are respectively for charging and discharging from the power supply VCC to a capacitor C1, where large current is limited, thus preventing noise generation. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
