发明名称 |
Apparatus and method for over-voltage, under-voltage and over-current stress protection for transceiver input and output circuitry |
摘要 |
A circuit for protection of a transceiver input includes an input transistor and a first resistor connected between the drain of the input transistor and an input node. A plurality of reverse-biased diodes connected between a supply voltage and the input node. An output node is connected to the source of the input transistor. A first forward-biased diode connected between the power supply and the plurality of reverse-biased transistors. A second forward-biased diode and a second resistor are connected between the first forward biased transistor and the gate of the input transistor. A pre-driver circuit includes first and second transistors forming a differential pair and driven by a differential input voltage. A third transistor is connected between sources of the first and second transistors and ground. First and second resistors are connected to drains of the first and second transistors, respectively. A fourth transistor is connected between a power supply voltage and the first and second resistors. Fifth and a sixth transistors are connected in series between the power supply voltage and the first and second resistors, wherein a node between the fifth and second transistors is connected to a gate of the fourth transistor.
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申请公布号 |
US7463068(B2) |
申请公布日期 |
2008.12.09 |
申请号 |
US20070712938 |
申请日期 |
2007.03.02 |
申请人 |
BROADCOM CORPORATION |
发明人 |
LEE WEE TECK;YUN TU;TEO TIAN HWEE |
分类号 |
H03K19/094;H01L27/02;H02H3/20;H04L25/08 |
主分类号 |
H03K19/094 |
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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