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18th August 2011, 08:07 #1
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How to calculate Slew Rate for Differential folded cascode opamp.....??
How to calculate Slew Rate for Differential folded cascode opamp.in cadence can anybody tell me ....??
thanks in advance...

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18th August 2011, 09:09 #2
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Re: How to calculate Slew Rate for Differential folded cascode opamp.....??
ASHUTOSH RANE,
After tarnsient simulation you have to do direct plot differential output signal from Results>directPlotTransient>transient difference
Than you can deriviate this expression to calculate slew rate of differential output.
Or use this expression in cadence command line:
deriv((v("/OUT1" ?result "tran")  v("/OUT2" ?result "tran")))
Best Reguards
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18th August 2011, 10:14 #3
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Re: How to calculate Slew Rate for Differential folded cascode opamp.....??
thanks alex
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18th August 2011, 10:53 #4
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Re: How to calculate Slew Rate for Differential folded cascode opamp.....??
hi alex
i found the derivative accoring to formula u given ....
i got pulsed waveform
now with this wave form and defination of slew rate we can find slew rate as maximum rate of change of output .....i got such a value equal to...
SR+ =229e6.
SR =227e6
CL=1pF
but these are very high values right ....??
have i done any mistake in calculation of maximum slope??

18th August 2011, 11:29 #5

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18th August 2011, 12:59 #6
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Re: How to calculate Slew Rate for Differential folded cascode opamp.....??
hi ASHUTOSH RANE
There is no any mistake in calculation,
all right!
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