Amazing Problems on OPAmp - Integrator || GATE 2025 || PrepFusion
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Note : In problem 3, the graph of Vo starts from 10v, not from Zero. Analysis and calculation remains the same.
In Problem 2, Time constant will be RC/2 after saturation.
Bhaiya can you please explain why after saturation the time constant would be RC/2
@@suvrojitmukherjee3662 Treat it as a simple RC ckt, You will understand
So the final answer of prob 2 will be 2.094 right?
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Bhaiya could you please explain why the time constant of the circuit is not 2RC after saturation in 2nd problem
Actually it will be rc/2 not 2rc Or rc once the saturation happens
30:00 I think the capacitor C's charging nor discharging doesn't necessarily effect the Vo thus its charging is not what matters .The charging of 2C capacitor on the other hand is what influence the Vo so its charging path R is taken for obtaining Time constant??
I believe its the R from the input side correct me if I'm wrong
No, R is the feedback one.
Rest your reasoning looks correct.
@@HimanshuAgarwal_ Thanks
First to comment!
In problem 2 for Vx after saturation......i guess Time constant should be RC/2
it be rc/2 sir
@@PrepFusion_GATE ok..i get it.... It will be a (parallel combination of both the resisters)×C=(RC) /2
q/c=i2r q0/c=10
25=(i1+2i2)r
=(i2'rc+2i2)r
25/r-2i2=rci2'
i2r=(25-5e^-2t/rc)/2
vx=i2r-10 =(1-e^-2t/rc)*2.5
at t=0.9 s vx=2.08
@@PrepFusion_GATE it is RC/2 right??
Hi,
Yes, after saturation it would be RC/2 only.
Before saturation it would be RC