发明名称 |
Capacitively-coupled extended swing zero-DC-power active termination with CMOS overshoot/undershoot clamps |
摘要 |
An active terminating circuit has buffers to produce wider voltage drives on clamping transistors. A transmission line drives coupling capacitors. One capacitor drives an upper node that drives the gate of an upper buffer transistor. The upper buffer transistor drives a p-gate node coupled to a gate of a p-channel clamping transistor. The other capacitor drives a lower node that drives the gate of a lower buffer transistor, which drives an n-gate node of an n-channel clamping transistor. The drains of the clamping transistors are connected to the transmission line. Resistors pull the lower node to the power-supply voltage and pull the upper node to ground when no transitions occur on the transmission line, achieving zero standby power. When a transition is detected, it is coupled through the capacitors and buffered to the p-gate and n-gate nodes. Limiting transistors limit upper and lower node swings.
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申请公布号 |
US6429678(B1) |
申请公布日期 |
2002.08.06 |
申请号 |
US20010683127 |
申请日期 |
2001.11.21 |
申请人 |
PERICOM SEMICONDUCTOR CORP. |
发明人 |
WONG ANTHONY YAP;LIN KWONG SHING |
分类号 |
H03K17/16;(IPC1-7):H03K17/16 |
主分类号 |
H03K17/16 |
代理机构 |
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