[SOLVED] input referred noise and bandwidth

Status
Not open for further replies.

Winny_Puuh

Junior Member level 1
Joined
May 1, 2013
Messages
17
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,461
Hi guys, I have a question (again) but it's a short one this time:
if I have a bandwidth of 50kHz, a gain of 50dB --> GBW = 50dB(=316)*50k = 15.8MHz
I want to calculate the input referred noise (thermal) V = 8kT/3*(2/gm1), then I square it, integrate it and here is my question: do i have to multiply it with 15.8Mhz or 50kHz? This makes quite a difference and I dont know which one is the right one...
 

If the 50kHz bandwidth is determined by a filter in the amplifier then you would use a 50kHz bandwidth to calculate the total noise.
 

Thank you =) that's good news :wink:
 

Status
Not open for further replies.

Similar threads

Cookies are required to use this site. You must accept them to continue using the site. Learn more…