| 摘要 |
A driver having a cascode stage with a common gate transistor that provides an output transmit signal at a driver output node. A protection circuit includes a resistor coupled to bias a gate of the common gate transistor to a clamp voltage. The resistor has a resistance value at least large enough to allow the gate voltage to follow some of a transition in the driver output node voltage when the driver is not transmitting. The resistance value may also be selected to delay the gate voltage from returning to the clamp voltage following the transition, so that the voltage between the gate and a source of the common gate transistor does not reach a level that can damage the common gate transistor.
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