How to get maximum operating frequency??

[ramesh441]

Hello

I am simulating a LNA which is of differential topology . I want to find its single ended gain and Band width. Mainly I want to know what is the maximum operating frequency.


How can I do it???


Can you give me any tutorial.


Thanking you,
RamesH

 

[uzay1983]

What do u mean by maximum operating frequency. If you say that the band limitation of your LNA, this will be determined by the ft of your transistors. Therefore you have to bias your transistors at such operating points that will yield max. ft. Also you have to conside NF and power consumption.

 

[girih192002]

your question is no clear to me also. do you want to find out Ft or Fo ?

3 dB bandwidth ..


please explain your question in more detail.

 

[vfone]

The maxim operating frequency of an LNA is given by the RF system analysis.
Is the frequency limit where the LNA has acceptable gain (generally > 10dB) and maximum noise figure (generally <2dB, but imposed by the RF system analysis to get the proper SNR)

 

[ramesh441]

I want to just find ac gain response and want test bench for it