| ??? 04/28/11 21:31 Read: times |
#182091 - No need to align with any zero axis Responding to: ???'s previous message |
Just add a DC offset to the signal and let the ADC measure the curve.
Use a MUX so you can measure the exact DC voltage too. Then you know in software how many ticks to subtract and will be able to recreate a zero-relative curve. If you know that the original signal doesn't have any DC component then you can instead just have a sw-only high-pass filter that "floats" the measured curve until you have found how much to subtract from the ADC readings until you get symmetric data. |
| Topic | Author | Date |
| Zero crossing without precision rectifier | 01/01/70 00:00 | |
| read the datasheet | 01/01/70 00:00 | |
| Inserting a DC component | 01/01/70 00:00 | |
| ??? | 01/01/70 00:00 | |
| Explanation | 01/01/70 00:00 | |
| No need to align with any zero axis | 01/01/70 00:00 | |
| Great | 01/01/70 00:00 | |
| Are you sure your current/voltages are sine waves? | 01/01/70 00:00 | |
no sinusodal currents | 01/01/70 00:00 |