How to setup and measure DNL and INL in Cadence Spectre?

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coolstuff07

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Hi,

What is the setup for INL and DNL and hoew to measure
INL and DNL in cadence spectre.

Bye.
 

inl dnl calculation

Use a linear or stair case ramp of about 1bit/sample, and compare the converter's output to its input (reconvert the output by an ideal anti-converter, if necessary). You must take care of the time latency, apparently, (either in time or in voltage/bit domain).
For INL/DNL calculation, use their standard definitions, respectively.
 

dnl inl

I thought I saw some verilog-a code on Poulton's site to automagically calculate INL/DNL...
 

inl dnl calculations

could you please share it ?
thanks very much

lladnar23 said:
I thought I saw some verilog-a code on Poulton's site to automagically calculate INL/DNL...
Click to expand...
 

inl calculation


Hi, the histogram testing is also popular, in which the sinusoidal wave input is added. what do you think?
 

inl dnl pdf

iamxo said:
Hi, the histogram testing is also popular, in which the sinusoidal wave input is added. what do you think?
Click to expand...

Sure, this is also a very valuable method, however needs more effort in simulation and data processing. S. e.g. p.3 (Fig. 8 ) of the PDF below. Fig. 10 on p. 4 shows the standard DNL / INL presentations.
 

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