Tutorial on how to perform a nodal analysis of circuits containing operational amplifiers (op-amps). Two examples of cascaded op-amp networks are worked through.
man i can not thank you enough i haven't found any video that explains nodal analysis in op amp circuits... and these are the type of videos you need for exams.
Setting the constraints (0v between inverting and non-inverting Input, input current=0) hide the impact of input offset voltage and Input bias current. In a Majority of Applications this can be done. On the other Hand for worst case analysis we should Not simply hide these parasitics. For sure the equation will be more complex but with the help of Math tools you can handle this. E.g. Mathcad has implemented Symbolic solver. You only need to enter the KCL and the nodal equations.
Because we're writing the nodal equation FOR Va (when we write a nodal equation for a node we imagine all currents are leaving the node). So what you wrote in your comment is Vs nodal equation, but remember, we don't write nodal equations for voltage sources.
Hello, i think it would be better to draw the Current flow Into or out of a node. The sum of the node currents shall be Zero. If you have drawn the current arrow ist is more obvious how to write the nodal equations.
man i can not thank you enough i haven't found any video that explains nodal analysis in op amp circuits... and these are the type of videos you need for exams.
Amplifiers can be a bit trick when u dosent have the luck picking class. And this simple videoclass solve a bunch of my doubts. Thank you professor
you make the op-amp topic as easy as A-B-C. Thank you sir!
Muchas gracias, es el mejor vídeo explicativo que he encontrado
Much appreciated Sir 😊
Eample1 :
Use 2 node to find vo(easy)
Eample2:
Just flip up the bottom circuit and it will be clear.
Thank you very much, really, you have explained this topic easily and clearly.
Thank you so much sir, you're a great explainer!
this is really nice, i was stack over Op-Amp problems of this kind....merci beaucoup
This video is great!! Thank you so much!! :D
what a beats , im from 2021 , and man , like , respect
cant wait for season 2
Great analysis. Thank you
this is really great
great job, Ty
Thank you
What are practical applications of these cascaded op amps? Thank you in advance for any replies!
Ηι very nice ! do you have any ppt or pdf file with this ?
Setting the constraints (0v between inverting and non-inverting Input, input current=0) hide the impact of input offset voltage and Input bias current. In a Majority of Applications this can be done. On the other Hand for worst case analysis we should Not simply hide these parasitics. For sure the equation will be more complex but with the help of Math tools you can handle this. E.g. Mathcad has implemented Symbolic solver. You only need to enter the KCL and the nodal equations.
sir why it is not Vs-Va/R1 in second example?
Because we're writing the nodal equation FOR Va (when we write a nodal equation for a node we imagine all currents are leaving the node). So what you wrote in your comment is Vs nodal equation, but remember, we don't write nodal equations for voltage sources.
Hello, i think it would be better to draw the Current flow Into or out of a node. The sum of the node currents shall be Zero. If you have drawn the current arrow ist is more obvious how to write the nodal equations.
design and draw a circuit using an op-amp to get +8v at output for input less than +4v and -8v at output for input greater than +4v.
Plz solve this
Basic comparator, use 8v rails.
Im lost!😅