| ??? 05/06/05 16:07 Modified: 05/06/05 16:12 Read: times |
#93087 - no analog part Responding to: ???'s previous message |
there is no analog part in the circuit it is all digital and most interesting thing is that without any digital component around mcu only mcu is there in circuit, i have done fft of ground noise it is matching with crystal frequency a bit obvious
crystal is source of noise,noise can also observed on i/o pins upto level of 20mv. kuldeep singh |
| 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 |