Problem with spice -- Noise analysis error

In summary, The AC analysis is working correctly with the output at the netlist of the AD8139 pin 5. However, the noise analysis is showing an error due to an incorrect source specified in the .NOISE directive. To fix this, make sure the source is an independent source such as a voltage or current source.
  • #1
sabyasachi
1
0
I am using a circuit attached as image and the AC analysis is working perfectly. Output is at the netlist of the AD8139 pin 5. The noise analysis showing the error :

*Analysis directives:
.AC DEC 10 10 1g
.NOISE V19 V[N08184] 30
-------$
ERROR(ORPSIM-16291): Must be independent source (I or V)
.OP
.OPTIONS ADVCONV
.PROBE64 V(alias(*)) I(alias(*)) W(alias(*)) D(alias(*)) NOISE(alias(*))

What to do?
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  • #2
The error you are receiving indicates that the source specified in the .NOISE directive is not an independent source (I or V). The source must be a voltage or current source to be analyzed for the noise analysis. Check the source specified in the .NOISE directive and ensure it is an independent source.
 

Related to Problem with spice -- Noise analysis error

1. What is the "Problem with spice -- Noise analysis error"?

The "Problem with spice -- Noise analysis error" refers to an error that occurs in the SPICE simulation software, commonly used in electronic circuit design. This error occurs when the noise analysis function is unable to accurately simulate the noise characteristics of the circuit, resulting in incorrect results.

2. What causes the "Problem with spice -- Noise analysis error"?

The "Problem with spice -- Noise analysis error" can be caused by a variety of factors, including incorrect input values, incorrect circuit configurations, or limitations of the SPICE software itself. It can also occur when the circuit being simulated has complex noise characteristics that are difficult to model accurately.

3. How can I fix the "Problem with spice -- Noise analysis error"?

To fix the "Problem with spice -- Noise analysis error", you can try adjusting the input values and circuit configuration to simplify the noise characteristics. You can also try using a different noise analysis function or software. If the error persists, it may be necessary to consult with other experts or conduct further research to accurately model the noise in your circuit.

4. Is the "Problem with spice -- Noise analysis error" a common issue?

Yes, the "Problem with spice -- Noise analysis error" is a relatively common issue in SPICE simulations. This is due to the complexity of simulating noise in electronic circuits and the limitations of the software. However, with careful consideration of input values and circuit configurations, this error can often be avoided.

5. Are there any alternative methods for analyzing noise in electronic circuits?

Yes, there are alternative methods for analyzing noise in electronic circuits. Some popular alternatives to SPICE simulations include Monte Carlo simulations, which use statistical analysis to model noise, and Time-Domain simulations, which simulate the behavior of a circuit over time. These methods may provide more accurate results for circuits with complex noise characteristics.

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