??? 05/06/05 15:47 Read: times |
#93080 - FFT Responding to: ???'s previous message |
If you want to see the noise component generated by the micro then simply perform an FFT on the noise signal and any noise coming from the digital circuitry will be very highly correlated with the processor clock frequency and its harmonics,so you should be able to see the analogue noise and the digital noise. |
Topic | Author | Date |
noise comparison | 01/01/70 00:00 | |
apples and oranges | 01/01/70 00:00 | |
decoupling | 01/01/70 00:00 | |
possibly | 01/01/70 00:00 | |
directly soldered | 01/01/70 00:00 | |
10nF | 01/01/70 00:00 | |
and get ceramic | 01/01/70 00:00 | |
FFT | 01/01/70 00:00 | |
no analog part | 01/01/70 00:00 | |
when extreme DIP is a no-no | 01/01/70 00:00 | |
thats right | 01/01/70 00:00 | |
long internal wires | 01/01/70 00:00 | |
what why less in pic | 01/01/70 00:00 | |
Identical ? | 01/01/70 00:00 | |
any reason you like | 01/01/70 00:00 | |
thats valuable | 01/01/70 00:00 | |
nope | 01/01/70 00:00 | |
but if | 01/01/70 00:00 | |
regardless of how you do it | 01/01/70 00:00 | |
have any body got zero level | 01/01/70 00:00 | |
Philosophically .... | 01/01/70 00:00 | |
how to post jpg | 01/01/70 00:00 | |
Posting Images. | 01/01/70 00:00 | |
how to post | 01/01/70 00:00 | |
"Print" formats ? | 01/01/70 00:00 | |
screen grab | 01/01/70 00:00 | |
What you see isn't just 'ground noise'! | 01/01/70 00:00 | |
here is layout steve | 01/01/70 00:00 | |
What is it???? Too few details>>>> | 01/01/70 00:00 | |
sufficient | 01/01/70 00:00 | |
Re: Suffiecient. | 01/01/70 00:00 | |
Are the Xtal burden caps really.... | 01/01/70 00:00 | |
let me explain | 01/01/70 00:00 | |
never coils in power return | 01/01/70 00:00 | |
but they are | 01/01/70 00:00 | |
yes | 01/01/70 00:00 | |
ApplesandOranges, | 01/01/70 00:00 | |
ok steve | 01/01/70 00:00 | |
Read and inwardly digest | 01/01/70 00:00 | |
ok i will don with diff.![]() | 01/01/70 00:00 | |
also | 01/01/70 00:00 |