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Bordodynov
- Joined May 20, 2015
- 3,431
Here is my collection of models and my research.
Do i need to buffer op amp outputs?
- Thread starter Fluxor1964
- Start date
A few comments about op-amps in the design of reply #19.
The LM324 (quad) or LM358 (dual) _might_ be fast enough. As mentioned earlier, a better choice would be the TL084 (quad) or TL082 (dual).
If you use 2 dual op-amps then put U2 and U3 as one pair and U4 and U5 as the other pair. This allows you to use +/-15 volts for the power supplies of U4 and U5 to get a larger output voltage swing. RV2 would have to be changed to a 25K pot as well.
For simulation, you can try the LT1013 for the op-amps. I think it is similar to LM358.
Don't forget that the circuit requires the 555 timer to be the CMOS version.
The LM324 (quad) or LM358 (dual) _might_ be fast enough. As mentioned earlier, a better choice would be the TL084 (quad) or TL082 (dual).
If you use 2 dual op-amps then put U2 and U3 as one pair and U4 and U5 as the other pair. This allows you to use +/-15 volts for the power supplies of U4 and U5 to get a larger output voltage swing. RV2 would have to be changed to a 25K pot as well.
For simulation, you can try the LT1013 for the op-amps. I think it is similar to LM358.
Don't forget that the circuit requires the 555 timer to be the CMOS version.
Your LM324 model is a transistor model which shows the crossover distortion.
The two other LM324 models I had were macromodels which do not show the distortion.
I'm now using your model.
Thanks,
Zapper
