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High load output capacitance in LVDS and CML output buffers

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husseinadel

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in LVDS and CML output buffers,,,,,i have certain required swing, and a matching resistance of 100 ohm differentially, put at the output,,,so current are predetermined,,,so,,,what can i change to account for high load output capacitance?,,,,,,thanks
 

LVDS and CML

Frankly to say, I don't get your point clearly. To drive a large loading cap., it's a common practice to cascade a couple of tappered CML buffer. Hope that you could elaborate your question.
 

Re: LVDS and CML

darkk said:
Frankly to say, I don't get your point clearly. To drive a large loading cap., it's a common practice to cascade a couple of tappered CML buffer. Hope that you could elaborate your question.
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ok,,m y point is the current is determined by the swing and the 50 ohm resistance of matching,,,,so,,,,W/L will be also determined from the CM input to it ,,,so,,if the capacitance is large ,,,what can i do?
 

LVDS and CML

Hi
I am layout a LVDS . But dont the key point . Who can give me some help ??
 

Re: LVDS and CML

hltong said:
Hi
I am layout a LVDS . But dont the key point . Who can give me some help ??
Click to expand...

isa i will layout lvds but not nowadays,,may be after 4 weeks ,,,if you can wait ,:D
what d oyou mean by "But dont the key point "???
 

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