Timeline for Analog multiplier using logarithmic and anti-logarithmic opamp output problem
Current License: CC BY-SA 4.0
3 events
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| Dec 19, 2018 at 13:28 | comment | added | user4574 | I like the idea of using an extra log amp to create the offset. If all the transistors were in a matched set (such as the MAT14) then this method would probably have more stable gain at different ambient temperatures. | |
| Dec 18, 2018 at 1:33 | comment | added | user4574 | A capacitor in the feedback path is usually a good idea for most op-amp circuits (and wouldn't hurt here). But when I built a square root circuit that was almost identical to this one without the capacitors, it didn't oscillate. But it did require an offset in the summing amplifier. | |
| Dec 17, 2018 at 4:02 | history | answered | Spehro 'speff' Pefhany | CC BY-SA 4.0 |