Help with choice of LIA design!

A

Archer

Guest
I am making a LIA design that need the schemetica be simulated
well. I used the two ways that is AD630 and the switch on noninverting
opamp for PSD,but when i using AD630 in Pspice ,the converge error
occured inside the model,and the switch method i was using get the
signal changed a lot with large noise(for on/off rate?) and DC
bias.The last way i think is using AD633 the analog
multiplier,however,i don't know whether the precision is as good as
AD630.
Would someone can help me?Thanks!
 
On Tue, 25 May 2004 23:21:51 +0800, Archer <xydarcher@hotmail.com>
wrote:

I am making a LIA design that need the schemetica be simulated
well. I used the two ways that is AD630 and the switch on noninverting
opamp for PSD,but when i using AD630 in Pspice ,the converge error
occured inside the model,and the switch method i was using get the
signal changed a lot with large noise(for on/off rate?) and DC
bias.The last way i think is using AD633 the analog
multiplier,however,i don't know whether the precision is as good as
AD630.
Would someone can help me?Thanks!
Click to expand...
What's an LIA? Lockin?

John
 
Archer wrote:
I am making a LIA design that need the schemetica be simulated
well. I used the two ways that is AD630 and the switch on noninverting
opamp for PSD,but when i using AD630 in Pspice ,the converge error
occured inside the model,and the switch method i was using get the
signal changed a lot with large noise(for on/off rate?) and DC
bias.The last way i think is using AD633 the analog
multiplier,however,i don't know whether the precision is as good as
AD630.
Click to expand...
Lock-in with the AD630 ?
Yes, it works. What is the purpose of simulating something you
know to be working ? You wish to figure out whether your model is as
good as the reality ?
I'd rather suggest to worry about coming even close to the
specifications. A breadboard approach won't get you the specified
100dB.

Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
 
Yes, it's Lock-in Amplifier.
On Tue, 25 May 2004 10:14:05 -0700, John Larkin
<jjlarkin@highSNIPlandTHIStechPLEASEnology.com> wrote:

On Tue, 25 May 2004 23:21:51 +0800, Archer <xydarcher@hotmail.com
wrote:

I am making a LIA design that need the schemetica be simulated
well. I used the two ways that is AD630 and the switch on noninverting
opamp for PSD,but when i using AD630 in Pspice ,the converge error
occured inside the model,and the switch method i was using get the
signal changed a lot with large noise(for on/off rate?) and DC
bias.The last way i think is using AD633 the analog
multiplier,however,i don't know whether the precision is as good as
AD630.
Would someone can help me?Thanks!

What's an LIA? Lockin?

John
Click to expand...
 
en,
the simulation is for my paper of graduation!

so i need some figure and schemetia to show the result,and I didn't
have enough time to do the experiment.

On Tue, 25 May 2004 21:26:14 +0200, Rene Tschaggelar <none@none.net>
wrote:

Archer wrote:
I am making a LIA design that need the schemetica be simulated
well. I used the two ways that is AD630 and the switch on noninverting
opamp for PSD,but when i using AD630 in Pspice ,the converge error
occured inside the model,and the switch method i was using get the
signal changed a lot with large noise(for on/off rate?) and DC
bias.The last way i think is using AD633 the analog
multiplier,however,i don't know whether the precision is as good as
AD630.

Lock-in with the AD630 ?
Yes, it works. What is the purpose of simulating something you
know to be working ? You wish to figure out whether your model is as
good as the reality ?
I'd rather suggest to worry about coming even close to the
specifications. A breadboard approach won't get you the specified
100dB.

Rene
Click to expand...
 
Who has ever completed the Lock-In Amplifier simulation successful?
I read the article "THE LOCK IN MODULATION IN ULTRA LOW FREQUENCY
APPLICATION" at http://www.vlf.it/ghedi/lockin.html
but I set the circuit as it introduced the convergence error still
exist.would someone give me a example of it please? any suggestion
would be appreciate.


On Wed, 26 May 2004 08:27:03 +0800, Archer <xydarcher@hotmail.com>
wrote:

en,
the simulation is for my paper of graduation!

so i need some figure and schemetia to show the result,and I didn't
have enough time to do the experiment.

On Tue, 25 May 2004 21:26:14 +0200, Rene Tschaggelar <none@none.net
wrote:

Archer wrote:
I am making a LIA design that need the schemetica be simulated
well. I used the two ways that is AD630 and the switch on noninverting
opamp for PSD,but when i using AD630 in Pspice ,the converge error
occured inside the model,and the switch method i was using get the
signal changed a lot with large noise(for on/off rate?) and DC
bias.The last way i think is using AD633 the analog
multiplier,however,i don't know whether the precision is as good as
AD630.

Lock-in with the AD630 ?
Yes, it works. What is the purpose of simulating something you
know to be working ? You wish to figure out whether your model is as
good as the reality ?
I'd rather suggest to worry about coming even close to the
specifications. A breadboard approach won't get you the specified
100dB.

Rene
Click to expand...
 
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