Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

active filter noise figure

Status
Not open for further replies.

dd2001

Full Member level 4
Full Member level 4
Joined
Apr 14, 2002
Messages
236
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,298
Activity points
1,912
Anyone knows how to calculate active filter noise figure?

thanks.
 

It is based on the same principle as you did for your LNA/mixer:

First you need to calculate your input referred noise power. Then you need to assume a certain impedance level (for example, 1kohm is a typical number). Then you perform:

NF = (4kTRin + Pin)/(4ktRin),

where Rin= 1kohm, Pin is the input referred noise power. The calculation above include input-referred noise voltage AND current.

Willy
 

i think that you hate to make relation between SNRout and SNRin
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top