I have started using SpetreRF recently and would like to know how to determine the length of the emitter of a BJT in order to have an optimum noise resistance Ropt equal to the resistance of the source Rs, e.g. 50 ohms.
-How this can be achieved through the simulation of Gopt and Bopt
-How this can be achieved through a simulation of Gmin
I will be interested to know about application notes that are available on the topic
If you are new to SpectreRF, the first thing I recommend you do is go through Simulating Low Noise Amplifiers section of Appendix A of the SpectreRF User Guide. You will need to have an account on Cadence Online Support (http://support.cadence.com) to download the gpdk180 required to simulate the designs in the workshop.
Sr. Staff Support AE, Global Customer Support
Cadence Design Systems, Inc.
In reply to Tawna:
Thank you for your response. I have some documents, including the document on LNA's. I dont have yet the kit for simulations related to the workshop. I have time constraints and a quick indication on the best method to determine the length of the emitter of a BJT with SpectreRF will be appreciated,
Best Regards, Aba