Hello,

   I hear in eldo users can turn off flick noise in noise simulation. I don't know if there is the similar function in Cadence Spectre. I want to simulate the integrated noise for an opamp, but the integrated noise is too high. I think maybe the flicker noise disturbs, so I want to turn off it, and want to check how the result is if there is only thermal noise, is the integrated noise closed to KT/C.

   Thanks.

Hello Raj,

   Thank you for your reply.

   Could you please give more details about turn off flicker noise by setting Kf=0? Because usually the model libraries are in the server, I cannnot change it. Do you mean copy the model to local directory, then change it, and add them for the simulation.

  Jacki.

Hello Raj,

   Thank you very much. I already modify the model and turn off the flicker noise.

kf=0 only works for some noise models, for example bsim4's fnoimod=0.  If your model has fnoimod=1, then you'll need to change that parameter also.

Models are only input textfiles to the tool.

If you have interest in the link between a specific physical effect modeled, described by a number in the model text file, and your circuit effect you should use it as inputs.

Barry Gilbert describe this method for some decades as "Foundation Design" because it gives you the best basis to understand the relationship between the physics of the devices and the topology and dimensioning of the circuits to overcome them. It lead finally to robust designs.

After these decades the foundries still provide "verification" enviroments, named "kits" instead of "design" enviroments. Some managers still think that is the most productive way to get to robust working circuits