Measure INL / DNL / SFDR in Spectre
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Measure INL / DNL / SFDR in Spectre

 
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curious
Guest
Posted: Sat Oct 30, 2004 12:22 am    Post subject: Measure INL / DNL / SFDR in Spectre Reply with quote
Hi,

I am a student and I would like to find out how to
measure INL / DNL /SFDR for a simple DAC using Cadence.

thanks
SIQU

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curious
Guest
Posted: Sun Oct 31, 2004 3:00 am    Post subject: Re: Measure INL / DNL / SFDR in Spectre Reply with quote
Hi,

Wonder can anyone advise ?
1) I have used the following calculations to measure the fundamental
but not sure how to obtain the harmonics to determine the Spurious free
dynamic response.

(ymax(dB20(dft((VT("/DAC_output"))) 26 52 2048
"Rectangular" 1 1)))

2) I have also used another approach - using the Fourier component
in the analoglib with a single sin tone but output is questionable.
-measure i/p: sin tone from DAC output
-ref i/p: sin tone

rgds
SIQU


geekspace@gmail.com (curious) wrote in message news:<677a6cf3.0410291222.21793fb7@posting.google.com>...
Quote:
Hi,

I am a student and I would like to find out how to
measure INL / DNL /SFDR for a simple DAC using Cadence.

thanks
SIQU
Back to top
oghdayan
Guest
Posted: Mon Nov 01, 2004 3:12 am    Post subject: Re: Measure INL / DNL / SFDR in Spectre Reply with quote
what about a pss analysis?

curious wrote:
Quote:
Hi,

Wonder can anyone advise ?
1) I have used the following calculations to measure the fundamental
but not sure how to obtain the harmonics to determine the Spurious free
dynamic response.

(ymax(dB20(dft((VT("/DAC_output"))) 26 52 2048
"Rectangular" 1 1)))

2) I have also used another approach - using the Fourier component
in the analoglib with a single sin tone but output is questionable.
-measure i/p: sin tone from DAC output
-ref i/p: sin tone

rgds
SIQU


geekspace@gmail.com (curious) wrote in message news:<677a6cf3.0410291222.21793fb7@posting.google.com>...

Hi,

I am a student and I would like to find out how to
measure INL / DNL /SFDR for a simple DAC using Cadence.

thanks
SIQU


Back to top
curious
Guest
Posted: Wed Nov 03, 2004 2:03 am    Post subject: Re: Measure INL / DNL / SFDR in Spectre Reply with quote
Thanks. I found the problem.
It seems silly - I need to use the current meter
to plot & measure rather than just selecting the node or net.


rgds
SIQU


oghdayan <oghdayan_AT@xs4all_dot.nl> wrote in message news:<41850f05$0$9404$e4fe514c@dreader10.news.xs4all.nl>...
Quote:
what about a pss analysis?

curious wrote:
Hi,

Wonder can anyone advise ?
1) I have used the following calculations to measure the fundamental
but not sure how to obtain the harmonics to determine the Spurious free
dynamic response.

(ymax(dB20(dft((VT("/DAC_output"))) 26 52 2048
"Rectangular" 1 1)))

2) I have also used another approach - using the Fourier component
in the analoglib with a single sin tone but output is questionable.
-measure i/p: sin tone from DAC output
-ref i/p: sin tone

rgds
SIQU


geekspace@gmail.com (curious) wrote in message news:<677a6cf3.0410291222.21793fb7@posting.google.com>...

Hi,

I am a student and I would like to find out how to
measure INL / DNL /SFDR for a simple DAC using Cadence.

thanks
SIQU
Back to top
 
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