发明名称 |
Power level detection circuit |
摘要 |
A level detection circuit for monitoring the level of a power supply voltage and producing an output signal at power on for resetting various system elements powered by the supply voltage when the supply voltage reaches a predetermined level. The detection circuit, which is powered by the supply voltage includes a voltage reference circuit which produces a reference voltage having a magnitude which is relatively independent of the power supply voltage. A translator circuit functions to produce a translated voltage indicative of the supply voltage magnitude and which is comparable in magnitude to the reference voltage when the supply voltage is at a suitable level such that the system will accept a power on reset pulse. A comparator circuit functions to compare the reference voltage with the translated voltage and cause an associated output circuit to issue the reset pulse. The reset circuit typically includes a one shot circuit, the output of which is logically ORed with the amplified comparator output. The amplified comparator output functions to hold the system elements in a reset state at very low supply voltages and the one shot output functions to reset the system elements once the supply voltage is at a sufficiently high level.
|
申请公布号 |
US6229352(B1) |
申请公布日期 |
2001.05.08 |
申请号 |
US20000513940 |
申请日期 |
2000.02.28 |
申请人 |
MICRON TECHNOLOGY, INC. |
发明人 |
CHEVALLIER CHRISTOPHE J.;ROOHPARVAR FRANKIE F.;BRINER MICHAEL S. |
分类号 |
H03K17/22;(IPC1-7):H03K5/22 |
主分类号 |
H03K17/22 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|