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how can i add a test pad in the ADC circuit?

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tuza2000

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i have finish a ADC layout,and i want to add a test pad in the layout,i dont know is it necessary add a buffer between the test point and the pad?
and if need,how ?

thanks
 

Hi,

Just connect your test pad to the the node you want to probe. Don't connect your circuit node through the test pad.

Franck.
 

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    tuza2000

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i dont know if the test point can drive the pad?
is it necessary add four inverter ?
thx
 

yes, if the test point can not drive the pad, you should add the buffer.
 

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    tuza2000

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i have add four inverter between the test point and pad,now i am doing postsimulate,it is so slow.
can anyone tell me how to postsimulate using nanosim?
 

Hi, tuza2000,
Nanosim is a high-precision transistor level simulation tool, so it is slow. Why not try Hspice?
If test pad needs to drive large capacitor or low value resistor load, buffer is needed.

Bg,

tuza2000 said:
i have add four inverter between the test point and pad,now i am doing postsimulate,it is so slow.
can anyone tell me how to postsimulate using nanosim?
Click to expand...
 

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    tuza2000

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nanosim has different level accuracy,you can config it to save time

regards
 

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    tuza2000

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