I can't find out any design isuue in your question.
Your question is no more than very easy issue of very specific vendor's simulator.
What simulator do you use ?
Vladislav D wrote on Jun 10th, 2010, 1:16pm:if I substitute series resistor and voltage source with 50-Ohms port
the output noise becomes 638nV/sqrt(Hz).
V
out2=4*k*{R
2/(R
1+R
2)}
2*(R
1*T
1+R
2*T
2)
Here R
1 and T
1 mean resistance and temperature of "port" respectively.
If R
1=R
2=50, V
out2=50*k*(T
1+T
2)
If T
1=T
2=300K, V
out=643.6[pVrms/sqrt(Hz)].
If T
1=290K, T
2=300K, V
out=638.2[pVrms/sqrt(Hz)].
See
http://www.designers-guide.org/Forum/YaBB.pl?num=1192525133/10#10The followings are general notes for you.
-
Always describe correct tool's name and vendor's name which you use as tool or simulator.- Don't do multiple posts which are same content.
- Don't request source code or behavioral model without any efforts.
- There are many simulators which have analyses called as PSS, PAC and Pnoise.
- Describe in detail with using correct terminologies.
- Warnigns are different from Errors.
- ADS is not name of simulator.
- There is no tool which name is Cadence.
- Don't use Direct Plot of Cadence ADE blindly without knowing definition.
- All gains in Direct Plot of Cadence ADE are "right", "true" and "practical" voltage gain.
- Don't mix up Simulation with Post Processing. They are completely different phase.
- MATLAB are different from Simulink.
- Learn measurements using actual instruments. Not "EDA Tool Play