Hi readers, the IN node has triangular wave converted from square wave pulse. This Op-Amp acts as integrator. However, when I attach the same integrator circuit to convert this triangular wave (IN) to sine wave, the Output (OUT) I got is still quite triangular and not quite a good sine wave.

Question: How to I get sine wave at OUT ? I have attach my LT spice file below. Thank you for reading

 

Hi,
Look through this link.
E

http://electronicmakeiteasy.blogspot.com/2013/03/op-amp-sine-wave-generator.html

https://www.google.com/search?sxsrf=AOaemvKrM4Ro41G3f3t7a58ODhfcF_Uoyw:1635580421073&source=univ&tbm=isch&q=sawtooth+to+sine+wave+circuit&client=firefox-b-d&fir=PwCidVyT-Dc40M%2CfDKn5vb0S7lnmM%2C_%3BVb92yRZc0m3mRM%2CUJadN9ram1WNLM%2C_%3B89CRyWN1GHoYFM%2CAxfF5nXbhY03pM%2C_%3Bt7JfXceIvH-SGM%2COGBbGuPm0CJRvM%2C_%3BRH4Bny3YFLp9gM%2C19K1l1LhX2FuxM%2C_%3BKlS3lpUQ-NvxCM%2CBeEFvKDQe5jaFM%2C_%3Bek6em32c7wt3QM%2CUJadN9ram1WNLM%2C_%3BIXfqc8DtpCmuwM%2CxCHg0EQJy-2qFM%2C_%3Bb5dUo5lkBhylTM%2CAj6ddAn9fsjpfM%2C_%3BWf4aUpxXJYj7cM%2CYlLCg9yC_maDNM%2C_%3BPJccR_2ohc5ZtM%2CiHt_bS3ynTtG3M%2C_%3BEztQWYv83WoU9M%2C19K1l1LhX2FuxM%2C_&usg=AI4_-kSmicKe8aahgQsGqbrSIFuUEWbUWQ&sa=X&ved=2ahUKEwiKgf_v0_HzAhWTfMAKHeDUDRMQsAR6BAgDEAM&biw=1435&bih=860

 

I filled-in the TRAN command (100ms, 98ms and 10ms) to see the waveforms.
R6 was missing and its 100 value was way too low, I made it 16k.
I added 2nF integration capacitors parallel with R2 and R5 then the simple 2nd-order filter removed most of the harmonics, but it reduced the level.