husseinadel
Full Member level 3
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hello
i am designing a CML output buffer ,,,concerning the last stage of CML line driver,i must have the resistances values equal to 50 ohm cause of matching ,,,and i want a certain swing ,,so , the current in the last stage is determined,,,,also ,,depending on the CM input level,,the sizes also determined,,,,now ,,if i have a large load capacitance value,,, what is my degree of freedom in the LAST stage????as most of the parameters are predetermined,,,,,,i can enlarge the differential swing at the input so that the current steering becomes faster ,,but this has a limit ,,depending on the supply,,,,,,so what degree of freedom that i can use???,,thanks
regards
hussein
i am designing a CML output buffer ,,,concerning the last stage of CML line driver,i must have the resistances values equal to 50 ohm cause of matching ,,,and i want a certain swing ,,so , the current in the last stage is determined,,,,also ,,depending on the CM input level,,the sizes also determined,,,,now ,,if i have a large load capacitance value,,, what is my degree of freedom in the LAST stage????as most of the parameters are predetermined,,,,,,i can enlarge the differential swing at the input so that the current steering becomes faster ,,but this has a limit ,,depending on the supply,,,,,,so what degree of freedom that i can use???,,thanks
regards
hussein
