| ??? 01/09/07 14:21 Read: times |
#130499 - Interference and reference Responding to: ???'s previous message |
I can't see any other way but to add some amplification. At the distance improvement I wish to make, the flux is quite low. Although I can "see" the difference in a multimeter, I think it would be wise to amplify the difference. Should I be looking at a Diff amp instead?
Currently, the ratiometric sensors are powered directly off of a 9 volt battery. The reference is a 3V lithium battery from the RTC. So it sounds like I'll have a decision to make there as well. Is it really wise to use the 9 volt battery (scaled down) as the reference? Wouldn't a precision reference be a better choice? Thanks for the information. Bruce |
| Topic | Author | Date |
| Analog Interface - Input Offset Clarification | 01/01/70 00:00 | |
| Instrumentation amps | 01/01/70 00:00 | |
| Interference and reference | 01/01/70 00:00 | |
| Absolute vs ratiometric | 01/01/70 00:00 | |
| Offset compensation | 01/01/70 00:00 | |
| Self-Zero'ing | 01/01/70 00:00 | |
| I would be wary of 24 bits of anything with an ADC | 01/01/70 00:00 | |
| Offset compensation | 01/01/70 00:00 | |
| ADuC | 01/01/70 00:00 | |
| Difference is offset. Not gain | 01/01/70 00:00 | |
| Another approach. | 01/01/70 00:00 | |
| Noted | 01/01/70 00:00 | |
| the ususal mistake | 01/01/70 00:00 | |
| A typical thread... | 01/01/70 00:00 | |
| To Kai | 01/01/70 00:00 | |
offset compensation | 01/01/70 00:00 |