lm723 multisim
Hello E-Design, I think there is a problem with my simulation because results are not logical. I used the model you kindly mentioned. With 10kHz I get something about 61db attenuation but most bizarre thing is with 100kHz ripple I get ~66db attenuation which can't be true. One of my friends uses proteus, I asked him to simulate the same circuit with proteus, he said he couldn't get a meaningful result because output of 723 is a flat line with no ripple and no matter how much he zooms or how many volts of ripple he feeds the 723, it is flat! The only way he could detect a ripple is to lower supply voltage or increase ripple so much that in negative portion of sine wave total supply voltage be less than 2 volts more than output voltage, but this is not acceptable because supply voltage should have at least 3V margin relative to output. So we have three different results with the same model, yours, mine and my friend! while your results are very logical but I like to know how can I reproduce it at least in proteus of my friend this is the result of my simulation @10kHz
Transient start time 5mSec
Transient stop time 10mSec (5.5mSec for 100kHz)
Transient step time 2uSec
Transient max step time 2uSec
All SPICE varables were in their default values except:
I only incremented itteration limits:
ITL1=300, ITL2=100, ITL4=500
No Error and I got this(in second graph, every division is 250uV)
for this circuit
Thanks