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[SOLVED] differentail voltage swing

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bunti

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what does a differential voltage swing of 1.2 V mean?
 

SkyHigh

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You can interpret this as peak-to-peak voltage of 1.2V (or 1.2Vpp to be more specific) for a balanced mode (differential pair).

what does a differential voltage swing of 1.2 V mean?
 

bunti

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Does that mean that the swing should be symmetrical w.r.t zero voltage or can it be like 0.6V to 1.8 V?
 

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As the name implies, Differential Voltage means Difference of Voltages across the load or the source, so there is no hard requirement to have zero-crossing at the mid-point.
However, it is usually the case with mid-point voltage as zero-crossing. This is because differential voltage usually terminated by equally-matched resistors of a T-network, passive balun, or by differential amplifier.

Does that mean that the swing should be symmetrical w.r.t zero voltage or can it be like 0.6V to 1.8 V?
 
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