calculate SR in ltspice

[Agus sugiono]

Greetings everyone ,, Maybe someone can explain how to calculate SR from this table?

 

[BSST]

The data you need is in Diff (Cursor2-Cursor1): 129.76953V/1.2093023us = ~107.3V/us

 

[Agus sugiono]

The data you need is in Diff (Cursor2-Cursor1): 129.76953V/1.2093023us = ~107.3V/us

thank you ,,,
sorry I'm still learning to use ltspice,

 

[Agus sugiono]

The data you need is in Diff (Cursor2-Cursor1): 129.76953V/1.2093023us = ~107.3V/us

for this one how to get SR 97/us?

 

[BSST]

I didn't spot that ltspice already computed for us the slope, aka slew rate. 😳

Here 59.389786V/641.22137ns = slope = 9.26189E7 V/s =92.26189V/us

I don't know how spice computes 97V/us. Perhaps the peak rate is a bit higher that the average shown graphically, but the concept is the same. The graph portrays what you'd see on a scope if you made a physical measurement.

 

[jan.didden]

thank you ,,,
sorry I'm still learning to use ltspice,

It's not a matter of LTspice. Its the same when you read a scope. The definition of slew rate is volts per sec (or usec). So if you see a voltage change of 60V during a 641nS time step, that's a slew rate of 60V per 641nS which from basic calculation is 60V/0.641us or 93V/1uS.

Jan

 

[Agus sugiono]

Saya tidak melihat bahwa ltspice sudah kemudahannya, alias tingkat perubahan tegangan. 😳

Di sini 59.389786V/641.22137ns = kemiringan = 9.26189E7 V/s =92.26189V/us

Saya tidak tahu bagaimana rempah-rempah menghitung 97V/us. Mungkin tingkat puncaknya sedikit lebih tinggi dari rata-rata yang ditampilkan secara grafis, tetapi konsepnya sama. Grafik yang menggambarkan apa yang akan Anda lihat pada ruang lingkup jika Anda melakukan pengukuran fisik.

It's not a matter of LTspice. Its the same when you read a scope. The definition of slew rate is volts per sec (or usec). So if you see a voltage change of 60V during a 641nS time step, that's a slew rate of 60V per 641nS which from basic calculation is 60V/0.641us or 93V/1uS.

Jan

It's not a matter of LTspice. Its the same when you read a scope. The definition of slew rate is volts per sec (or usec). So if you see a voltage change of 60V during a 641nS time step, that's a slew rate of 60V per 641nS which from basic calculation is 60V/0.641us or 93V/1uS.

Jan

thanks for the enlightenment sir