发明名称 |
Internal voltage generation circuit having ring oscillator whose frequency changes inversely with power supply voltage |
摘要 |
An internal voltage generation circuit down converts an external power supply voltage on the basis of a reference voltage. An oscillator outputs a pulse voltage according to a power supply voltage. A pump circuit generates the internal voltage according to the pulse voltage. A control circuit for the oscillator may include a current mirror amplifier so that when the power supply voltage is reduced the frequency of the pulse voltage becomes higher a corresponding amount and when the power supply voltage is increased the frequency of the pulse voltage becomes lower a corresponding amount.
|
申请公布号 |
US6064275(A) |
申请公布日期 |
2000.05.16 |
申请号 |
US19990318240 |
申请日期 |
1999.05.25 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
YAMAUCHI, TADAAKI |
分类号 |
G11C11/413;G05F1/46;G05F3/24;G05F3/26;G11C11/407;H02M3/07;H03K19/00;(IPC1-7):H03L7/00;G05F3/16 |
主分类号 |
G11C11/413 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|