| ??? 05/17/10 06:00 Read: times Msg Score: +1 +1 Informative |
#175954 - Ratiometric techniques; Calibration Responding to: ???'s previous message |
M Chitrakar said:
One thing that has really confused me is about drifting in electronic components/circuits. In what way are you confused? Are you, perhaps, confusing drift (a long-term tendency), with errors due to variations in ambient conditions? Is temperature the only factor? No. Very few things in this world are truly constant over all ranges of all environmental influences. Things can also be affected by mechanical stress, voltage, current, pressure, humidity, etc, etc,... As already mentioned, there's also the pure "ageing" effect of time itself. Some other common techniques to cope with it are: Calibration - you compare the result(s) of your system against a known reference, and either adjust your system to give the correct result(s), or note the correction factor(s) to be applied; Ratiometric techniques - instead of measuring the absolute value (which is subject to drift), you measure the difference or ratio between two systems with similar characteristics - so that the drift cancels out, and only the true value remains |
| Topic | Author | Date |
| Drifting in electronic components | 01/01/70 00:00 | |
| 100mV is 2% | 01/01/70 00:00 | |
| Educative | 01/01/70 00:00 | |
| Component modelling | 01/01/70 00:00 | |
| Modelling | 01/01/70 00:00 | |
| Quantitive modelling | 01/01/70 00:00 | |
| For resistors? | 01/01/70 00:00 | |
| I think you are getting the wrong idea | 01/01/70 00:00 | |
| Similar but different | 01/01/70 00:00 | |
| Distinguish "drift" from short-term changes | 01/01/70 00:00 | |
| Trying not to be pedantic | 01/01/70 00:00 | |
Drift is any change from the intial value | 01/01/70 00:00 | |
| How actually measured? | 01/01/70 00:00 | |
| An example only | 01/01/70 00:00 | |
| No general answer... | 01/01/70 00:00 | |
| Ratiometric techniques; Calibration | 01/01/70 00:00 |