| ??? 12/20/09 20:01 Read: times |
#171800 - Isn't that exactly what you should get? Responding to: ???'s previous message |
Stephen said:
I am trying to input an analog sinusoidal voltage signal with a 2.5 V dc offset, take the average over 20 or so samples, and find the peak value of the voltage signal from this average.
However, no matter what I do, the chip seems to put out only the DC offset. If you take the average over 20 samples, you should get the DC offset, because this is the average! Kai Klaas |
| Topic | Author | Date |
| ADuC816 Problem | 01/01/70 00:00 | |
| Sample rate ? | 01/01/70 00:00 | |
| Isn't that exactly what you should get? | 01/01/70 00:00 | |
| Indeed! | 01/01/70 00:00 | |
| Hmm | 01/01/70 00:00 | |
| average of the repetitive peak ? | 01/01/70 00:00 | |
| Better | 01/01/70 00:00 | |
| Clarification | 01/01/70 00:00 | |
| Signal Frequency | 01/01/70 00:00 | |
| magnitude | 01/01/70 00:00 | |
| Dump a number of samples to check | 01/01/70 00:00 | |
| it is possible? | 01/01/70 00:00 | |
| fast sample-and-hold | 01/01/70 00:00 | |
| sorry, but | 01/01/70 00:00 | |
| and | 01/01/70 00:00 | |
| it won't | 01/01/70 00:00 | |
| Undersampling often quite powerful | 01/01/70 00:00 | |
| what is conclusion for OP? | 01/01/70 00:00 | |
| How about precision rectification? | 01/01/70 00:00 | |
| re:ADUC816 | 01/01/70 00:00 | |
| sure, you can | 01/01/70 00:00 | |
| Most cheaper digital scopes uses repetitive sampling | 01/01/70 00:00 | |
| how about | 01/01/70 00:00 | |
| SF=1 | 01/01/70 00:00 | |
| Consistent not a simple subset of accurate | 01/01/70 00:00 | |
| Dumping Values | 01/01/70 00:00 | |
| *EDIT* | 01/01/70 00:00 | |
Circuit | 01/01/70 00:00 |