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How to simulate output swing of amplifier using H-spice?

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philipwang

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output swing

What configuration should be created to simulate output/input swing of a amp?
It is differential input and differential output folded cascode amp.
Thx!
 

swing calculation spice

configure it as uni gain feedback, sweep input, plot output vs. input
 
amp output swing simulation

That is running .DC analyse and sweep vin?
Thx!
 

edaboard output swing

It can be runned .Tran analyse with a slow and slope input. It also run .DC analyse and sweep vin.
 

output swing

Hi.
I think, .Tran analysis should be used for output swing calculation. you can use a .measure statement to measure p-p swing. e.g.
.meas tran swing PP v(out) from=0.1ms to=0.2ms
where in this case 0.1ms is the period of input voltage.
But don't forget, you must calculate THD at least by using .four statement. having THD more than 2 or 3% is not very suitable in any application.

Regards,
EZT
 

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