R6 / R14 to the ground = 0 gain
strange
strange
and very difficult to set the bias
Attachments
Hello,
I reproduced this graph with a simulation
exicon poshpull :
http://circlotron.audio/data/simulation/img/wingspreadMosfet.png
http://circlotron.audio/data/simulation/asc/WingspreadMosfet.asc
exion circlotron :
http://circlotron.audio/data/simulation/img/wingspreadMosfetCirclotron.png
http://circlotron.audio/data/simulation/asc/WingspreadMosfetCirclotron.asc
can someone check my simulation?
[http://circlotron.audio/data/simulation/img/wingspread.png
thanks
I reproduced this graph with a simulation
exicon poshpull :
http://circlotron.audio/data/simulation/img/wingspreadMosfet.png
http://circlotron.audio/data/simulation/asc/WingspreadMosfet.asc
exion circlotron :
http://circlotron.audio/data/simulation/img/wingspreadMosfetCirclotron.png
http://circlotron.audio/data/simulation/asc/WingspreadMosfetCirclotron.asc
can someone check my simulation?
[http://circlotron.audio/data/simulation/img/wingspread.png
thanks
I used my application to realize 16 187 040 simulations
Results:
1) increase the 100ohm R to ground increases the distortion, I vary from 100 to 1000 in steps of 100
2) decrease the quiescent current of the input stage decreases the distortion, I vary from 2 to 2.6 in steps of 0.2
3) the distortion is lower when the VAS has a very low current OR very high (2ma vs 15mA)
4) Generally distortion decreases with the increase of mosfet current, at 1w as at 100W, except at mid power ...
0.03% THD 10khz 100W 4ohm
0.0005% THD 10Khz 1w 8ohm
Results:
1) increase the 100ohm R to ground increases the distortion, I vary from 100 to 1000 in steps of 100
2) decrease the quiescent current of the input stage decreases the distortion, I vary from 2 to 2.6 in steps of 0.2
3) the distortion is lower when the VAS has a very low current OR very high (2ma vs 15mA)
4) Generally distortion decreases with the increase of mosfet current, at 1w as at 100W, except at mid power ...
0.03% THD 10khz 100W 4ohm
0.0005% THD 10Khz 1w 8ohm
Last edited:
all viable values and measure + thd @28V 4ohm output :
72000 combination :
http://circlotron.audio/data/simulation/brute/DISTO_20180905.csv
http://circlotron.audio/data/simulation/brute/DISTO_20180905.ods
bias op simulation : (I read binary raw file)
http://circlotron.audio/data/simulation/brute/BIAS.asc
http://circlotron.audio/data/simulation/brute/BIAS.net
http://circlotron.audio/data/simulation/brute/BIAS.png
thd simulation : I read log
http://circlotron.audio/data/simulation/brute/THD.asc
http://circlotron.audio/data/simulation/brute/THD.net
http://circlotron.audio/data/simulation/brute/THD.png
72000 combination :
http://circlotron.audio/data/simulation/brute/DISTO_20180905.csv
http://circlotron.audio/data/simulation/brute/DISTO_20180905.ods
bias op simulation : (I read binary raw file)
http://circlotron.audio/data/simulation/brute/BIAS.asc
http://circlotron.audio/data/simulation/brute/BIAS.net
http://circlotron.audio/data/simulation/brute/BIAS.png
thd simulation : I read log
http://circlotron.audio/data/simulation/brute/THD.asc
http://circlotron.audio/data/simulation/brute/THD.net
http://circlotron.audio/data/simulation/brute/THD.png
Last edited:
Hello,
anyone know TINA ?
I would like to simulate a circlotron with LME49830 but I can not get a current on mosfets
https://www.diyaudio.com/forums/att...779d1551451705-lme49830-tina-lme49830-tsc-txt
https://www.diyaudio.com/forums/att...4d1551694070-lme49830-tina-circlotron-tsc-txt
thanks
anyone know TINA ?
I would like to simulate a circlotron with LME49830 but I can not get a current on mosfets
https://www.diyaudio.com/forums/att...779d1551451705-lme49830-tina-lme49830-tsc-txt
https://www.diyaudio.com/forums/att...4d1551694070-lme49830-tina-circlotron-tsc-txt
thanks
four CFA version
Attachments
Last edited:
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