hello very nice explanation, could you tell me how does the whole thing change when we have a positive feedback? Thx ( I was thinking that with positive feedback there can only be instability since the output of the process just grows)
There are two false statements in this video: 1) There is no need to require a minimum phase system (i.e. one with no RHP zeros) to apply Bode plot stability analysis, 2) The requirement that GM > 0 is not needed as a stability criterion.
jonesr227 if course is needed. If a system has a gain peaking larger than 0dB but a 90degrees pm the system is.NOT stable. GM and PM need to both be checked. Especially in a LDO design where so many complex poles exist with Q factor too large often you will get good PM but horrible GM with peaking. The applied step response will have inf ringing.
Bravo. Only in a perfect world would all my lecturers teach as clearly as this.
Thank you oh savior for you have saved me from missing out on sitter marks on tomorrow's finals
Thanks man! Awesome video! Far better than anything my teacher taught me :)
Clear and concise explanation. Could you also explain the practical implications of the gain and phase crossover frequency?
One more question if the phase margin and gain margin are both infinity what do we say about the stability of such a system?
Can't you also find when the system goes unstable from the root locus by finding the jw crossing?
Great explanation. Good job.
how would you determinate if (141s +9)/(s^2+19s+141) is stable or not?
Great video
If Ira Glass did stability analysis... great video.
Great. This is really worthy.
what happens if the magnitude plot doesnt cross 0dB.? what can we say about the stability?
Why does it have to have no zeroes in RHP?
I understand no poles in RHP but why zeroes too?
poles go to the zeros as k increases so not ideal
helpful video! I would love to know how transfer functions are derived from real systems and what the poles and zeros represent in real systems.
Poles and Zeros are represented by RC's, LC's or RL's
man u r a live savor
hello very nice explanation, could you tell me how does the whole thing change when we have a positive feedback? Thx ( I was thinking that with positive feedback there can only be instability since the output of the process just grows)
Fantastic thank you for sharing your knowledge
Indefinite Stability, which means for any loop gain, the system will be stable.
Nicely explained..Thanks!
very clear and helpful video, Thanks :)
Great Video.
great writing
good stuff, really appreciate the video
Awesome now TH-cam algoritm recommends educational lessons too
thanks, really great analysis.
great video... thanks
Fantastic
It was helpful. Thanks!
Great ! thank you
same doubt here
thanks
ur awesome tnx
thankyou
very nice Vedio
Thank u sir
2:49 "this shit makes sense"
There are two false statements in this video:
1) There is no need to require a minimum phase system (i.e. one with no RHP zeros) to apply Bode plot stability analysis,
2) The requirement that GM > 0 is not needed as a stability criterion.
jonesr227 if course is needed. If a system has a gain peaking larger than 0dB but a 90degrees pm the system is.NOT stable. GM and PM need to both be checked. Especially in a LDO design where so many complex poles exist with Q factor too large often you will get good PM but horrible GM with peaking. The applied step response will have inf ringing.
saved my ass!