Noise analysis linearizes the circuit about the operating point and computes the noise spectral density at the output. You can enable noise analysis in AMS designer by setting the AMS_ENABLE_NOISE environment variable to YES. You can specify the noise analysis statement in your analog simulation control file as follows:
Name [p] [n] noise parameter=value ...
The optional terminals (p) and (n) specify the output of the circuit. If you do not specify the terminals, you must specify the output with a probe component.
For information on noise analysis parameters, refer to the Noise Analysis section in the Spectre Circuit Simulator Reference manual.
For small signal noise analysis, the AMS designer simulator supports the following noise sources specified in the Verilog-AMS or Verilog-A files:
white_noise
flicker_noise
noise_table