ENOB depends on SNR or SNDR?

B

boki

Guest
Dear All,
For a AD system, Does ENOB depend on SNR or SNDR?

Thanks.

Boki.
 
ENOB = (SINAD-1.76)/6.02
What's SNDR?
Dan

On 25 Mar 2004 07:47:57 -0800, bokiteam@ms21.hinet.net (boki) wrote:

Dear All,
For a AD system, Does ENOB depend on SNR or SNDR?

Thanks.

Boki.
Click to expand...
Colorado Springs, CO
My advice may be worth what you paid for it.
 
signal-to-noise
+ distortion ratio (SNDR)


"Dan Dunphy" <REMOVESPAMdandunphy@pcisys.net> ???
news:qu3660h4rkjopbvsvsd4c4mtoj0ivt5vp3@4ax.com ???...
ENOB = (SINAD-1.76)/6.02
What's SNDR?
Dan

On 25 Mar 2004 07:47:57 -0800, bokiteam@ms21.hinet.net (boki) wrote:

Dear All,
For a AD system, Does ENOB depend on SNR or SNDR?

Thanks.

Boki.

Colorado Springs, CO
My advice may be worth what you paid for it.
Click to expand...
 
boki wrote:
Dear All,
For a AD system, Does ENOB depend on SNR or SNDR?
Click to expand...
It depends on both, i.e. noise and distortion. Both are error sources.

Kevin Aylward
salesEXTRACT@anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

"quotes with no meaning, are meaningless" - Kevin Aylward.
 
If I want to make a talbe about my spec, which one should be take into
calculate for ENOB?

ENOB= SNR/6.xxx + 1.xxx
or
ENOB= SNDR/6.xxx+ 1.xxx

Thanks a lot.

Boki.


"Kevin Aylward" <kevindotaylwardEXTRACT@anasoft.co.uk> ŚbślĽó
news:CSQ8c.19$t22.15@newsfep3-gui.server.ntli.net ¤¤źśźg...
boki wrote:
Dear All,
For a AD system, Does ENOB depend on SNR or SNDR?


It depends on both, i.e. noise and distortion. Both are error sources.

Kevin Aylward
salesEXTRACT@anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

"quotes with no meaning, are meaningless" - Kevin Aylward.
Click to expand...
 
On Fri, 26 Mar 2004 04:59:38 +0800, "Boki" <bokiteam@ms21.hinet.net>
wrote:

signal-to-noise
+ distortion ratio (SNDR)


"Dan Dunphy" <REMOVESPAMdandunphy@pcisys.net> ???
news:qu3660h4rkjopbvsvsd4c4mtoj0ivt5vp3@4ax.com ???...
ENOB = (SINAD-1.76)/6.02
What's SNDR?
Dan
Click to expand...
Dan Dunphy's response is correct. What you are calling SNDR (did you
make that up?) should be called SINAD.

SINAD = (signal + noise + distortion) / (noise + distortion) expressed
in dB
 
Why our team always use SNDR for IEEE papers @@....??

What is SNDR real mean?


"Bob Penoyer" <rpenoyer@NOSPAMieee.org> ???
news:j55f60hb5jh7gvdutqoedg5agrjo6a0dbf@4ax.com ???...
On Fri, 26 Mar 2004 04:59:38 +0800, "Boki" <bokiteam@ms21.hinet.net
wrote:

signal-to-noise
+ distortion ratio (SNDR)


"Dan Dunphy" <REMOVESPAMdandunphy@pcisys.net> ???
news:qu3660h4rkjopbvsvsd4c4mtoj0ivt5vp3@4ax.com ???...
ENOB = (SINAD-1.76)/6.02
What's SNDR?
Dan

Dan Dunphy's response is correct. What you are calling SNDR (did you
make that up?) should be called SINAD.

SINAD = (signal + noise + distortion) / (noise + distortion) expressed
in dB
Click to expand...
 
On Tue, 30 Mar 2004 01:32:22 +0800, "Boki" <bokiteam@ms21.hinet.net>
wrote:

Why our team always use SNDR for IEEE papers @@....??
Click to expand...
Do your papers get published? Does the term remain SNDR in the
published version?

What is SNDR real mean?
Click to expand...
It appears to be a mystery.
 
On Tue, 30 Mar 2004 01:32:22 +0800, "Boki" <bokiteam@ms21.hinet.net>
wrote:

Why our team always use SNDR for IEEE papers @@....??

What is SNDR real mean?
Click to expand...
After making my earlier post, I Googled SNDR and found this:
http://www.control.isy.liu.se/~fredrik/reports/03icasspelbornsson.pdf

Equation 6 of the above paper defines SNDR. It appears to be 10 log of
the ratio of the signal power divided by the power of everything else.

So, if S represents signal power and E represents everything else
(noise + distortion), then

SINAD = (S + E) / E = (S / E) + 1
SNDR = S / E

So it appears that SINAD = SNDR + 1

"Bob Penoyer" <rpenoyer@NOSPAMieee.org> ???
news:j55f60hb5jh7gvdutqoedg5agrjo6a0dbf@4ax.com ???...
On Fri, 26 Mar 2004 04:59:38 +0800, "Boki" <bokiteam@ms21.hinet.net
wrote:

signal-to-noise
+ distortion ratio (SNDR)


"Dan Dunphy" <REMOVESPAMdandunphy@pcisys.net> ???
news:qu3660h4rkjopbvsvsd4c4mtoj0ivt5vp3@4ax.com ???...
ENOB = (SINAD-1.76)/6.02
What's SNDR?
Dan

Dan Dunphy's response is correct. What you are calling SNDR (did you
make that up?) should be called SINAD.

SINAD = (signal + noise + distortion) / (noise + distortion) expressed
in dB
Click to expand...
 
Good job, hope you could reply my questions next time.

Regards,

Boki.


"Bob Penoyer" <rpenoyer@NOSPAMieee.org> ???
news:a6ik60l9e3tdj4fn95fmu3ie14abfs954l@4ax.com ???...
On Tue, 30 Mar 2004 01:32:22 +0800, "Boki" <bokiteam@ms21.hinet.net
wrote:

Why our team always use SNDR for IEEE papers @@....??

What is SNDR real mean?

After making my earlier post, I Googled SNDR and found this:
http://www.control.isy.liu.se/~fredrik/reports/03icasspelbornsson.pdf

Equation 6 of the above paper defines SNDR. It appears to be 10 log of
the ratio of the signal power divided by the power of everything else.

So, if S represents signal power and E represents everything else
(noise + distortion), then

SINAD = (S + E) / E = (S / E) + 1
SNDR = S / E

So it appears that SINAD = SNDR + 1

"Bob Penoyer" <rpenoyer@NOSPAMieee.org> ???
news:j55f60hb5jh7gvdutqoedg5agrjo6a0dbf@4ax.com ???...
On Fri, 26 Mar 2004 04:59:38 +0800, "Boki" <bokiteam@ms21.hinet.net
wrote:

signal-to-noise
+ distortion ratio (SNDR)


"Dan Dunphy" <REMOVESPAMdandunphy@pcisys.net> ???
news:qu3660h4rkjopbvsvsd4c4mtoj0ivt5vp3@4ax.com ???...
ENOB = (SINAD-1.76)/6.02
What's SNDR?
Dan

Dan Dunphy's response is correct. What you are calling SNDR (did you
make that up?) should be called SINAD.

SINAD = (signal + noise + distortion) / (noise + distortion) expressed
in dB
Click to expand...
 
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