Timeline for "gain error" of rectifier circuit
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
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| Jan 4, 2018 at 21:34 | comment | added | Eugene K | Ok! AD8034 is much faster and I hope it will behave much better than AD8062. The limitations for small input signals have the same root as for high frequency: A1 have to make very fast and precise transitions with about 1 V fixed step, that causes input amplitufe-independent error. When signal amplitde decreases, signal/error ratio decreases too. One posible way is to pre-amplify input signal, if it's dynamic range is not too high. | |
| Jan 2, 2018 at 15:08 | comment | added | Junius | Sorry for no reply for quite long. I did not have the time so far to get pictures. Also, since I don´t want to hunt ghosts, I have drawn and ordered a small PCB for further experiments. That should "remove" bread-board related issues. Also, for the PCB, i used the AD8034 instead of the AD8602. According to simulations that should improve overall performance. I will come back here when I have new results. One question until then: How can I improve the circuit to also work below about 20mV? I don´t really understand the limitations for small input signals. | |
| Dec 18, 2017 at 23:25 | history | answered | Eugene K | CC BY-SA 3.0 |