Timeline for Differential-output op-amp vs. additional inverting op-amp?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Dec 15, 2016 at 0:51 | history | edited | Null♦ |
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| Dec 14, 2016 at 22:12 | vote | accept | Cal-linux | ||
| Dec 14, 2016 at 18:40 | history | edited | Null♦ | CC BY-SA 3.0 |
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| Dec 14, 2016 at 17:58 | answer | added | Null♦ | timeline score: 2 | |
| Dec 13, 2016 at 23:20 | comment | added | Cal-linux | I had thought about the delay issue, but at ~ 1 or 2MHz, I doubt the effect would be noticeable. Still, your point remains valid. As for the gain mismatch, I thought that would be equally an issue for the differential-output amp (seeing that we need to place a feedback network on each side), but looking carefully at the AD8138 datasheet, they specifically insist that the outputs are internally balanced and "guaranteed" identical magnitude and opposite sign (180 degrees apart), so I guess I'm sold. | |
| Dec 13, 2016 at 21:13 | comment | added | Sam | With a true differential amp, you won't get the kinds of delay or gain mismatch issues when using a single ended opamp | |
| Dec 13, 2016 at 21:09 | history | asked | Cal-linux | CC BY-SA 3.0 |