I am facing problem in adding noise in transient analysis in cadence spectre .
Can help me how to add noise as input source for transient analysis using simulator cadence spectre .
First of all, the Forum Guidelines say that you should not append new questions onto an existing, old post.
You can do what you want using Verilog-A. This has functions to generate white and flicker noise with coefficients, which should allow you to get the kind of shaping you want.