发明名称 |
Low current method for detecting presence of Ethernet signals |
摘要 |
A signal detection circuit for an Ethernet physical layer transceiver (PHY) device includes a first capacitor AC coupling a signal on the first receive terminal of the Ethernet PHY device to a first node; a second capacitor AC coupling a signal on the second receive terminal to a second node; re-biasing resistors for re-biasing the AC-coupled signals on the first and second nodes; first and second gain stages for amplifying the AC coupled signals; and a peak detect circuit. The peak detect circuit includes first and second diodes receiving the amplified signals from the gain stages to charge a peak detect capacitor. The signal detection circuit includes a comparator for comparing the voltage on the peak detect capacitor to a reference voltage and providing an output signal being indicative of the presence or absence of a signal on the first and second receive terminals of the Ethernet PHY device. |
申请公布号 |
US8208387(B2) |
申请公布日期 |
2012.06.26 |
申请号 |
US20070846781 |
申请日期 |
2007.08.29 |
申请人 |
STUEVE VINCENT;MICREL, INC. |
发明人 |
STUEVE VINCENT |
分类号 |
H04L1/00 |
主分类号 |
H04L1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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