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Q&A Find feedback of circuit

I have this circuit: I think that R3 acts like a feedback path from the output to the input.However I am not sure what will happen if I change the value from 100Ohms to lets say 1kOhms. I have ...

2 answers  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by LvW‭

#6: Question reopened by user avatar Olin Lathrop‭ · 2021-10-08T12:30:33Z (over 2 years ago)
#5: Post edited by user avatar MissMulan‭ · 2021-10-07T21:17:19Z (over 2 years ago)
  • I have this circuit:
  • ![](https://electrical.codidact.com/uploads/nk1CTmvqhfvpNqhUvgbaea2x)
  • What kind of feedback is there in this circuit?And which is the value of the feedback factor?
  • I didnt understand how to find the closed loop gain in my university classes that is why i am asking.
  • I have this circuit:
  • ![](https://electrical.codidact.com/uploads/nk1CTmvqhfvpNqhUvgbaea2x)
  • I think that R3 acts like a feedback path from the output to the input.However I am not sure what will happen if I change the value from 100Ohms to lets say 1kOhms.
  • I have this image in mind:
  • ![](https://electrical.codidact.com/uploads/sMD8SQcSLes5nVjMZ819En2f)
  • and I know the open loop gain must be close to 1 since we have a common collector(and relatively big value resistors) but I dont have any idea what kind of feedback this circuit has.
  • What kind of feedback is there in this circuit?And which is the value of the feedback factor?
#4: Post edited by user avatar MissMulan‭ · 2021-10-07T12:59:12Z (over 2 years ago)
  • I have this circuit:
  • ![](https://electrical.codidact.com/uploads/ujBtKiMsmrnu8Zod6yDYH2st)
  • What kind of feedback is there in this circuit?And which is the value of the feedback factor?
  • I didnt understand how to find the closed loop gain in my university classes that is why i am asking.
  • The input is the base of the BJT while the output is the emitter of the BJT
  • I have this circuit:
  • ![](https://electrical.codidact.com/uploads/nk1CTmvqhfvpNqhUvgbaea2x)
  • What kind of feedback is there in this circuit?And which is the value of the feedback factor?
  • I didnt understand how to find the closed loop gain in my university classes that is why i am asking.
#3: Post edited by user avatar MissMulan‭ · 2021-10-07T12:56:06Z (over 2 years ago)
  • I have this circuit:
  • ![](https://electrical.codidact.com/uploads/ujBtKiMsmrnu8Zod6yDYH2st)
  • What kind of feedback is there in this circuit?And which is the value of the feedback factor?
  • I didnt understand how to find the closed loop gain in my university classes that is why i am asking.
  • I have this circuit:
  • ![](https://electrical.codidact.com/uploads/ujBtKiMsmrnu8Zod6yDYH2st)
  • What kind of feedback is there in this circuit?And which is the value of the feedback factor?
  • I didnt understand how to find the closed loop gain in my university classes that is why i am asking.
  • The input is the base of the BJT while the output is the emitter of the BJT
#2: Question closed by user avatar Olin Lathrop‭ · 2021-10-07T12:17:52Z (over 2 years ago)
#1: Initial revision by user avatar MissMulan‭ · 2021-10-06T23:58:05Z (over 2 years ago)
Find feedback of circuit
I have this circuit:

![](https://electrical.codidact.com/uploads/ujBtKiMsmrnu8Zod6yDYH2st)

What kind of feedback is there in this circuit?And which is the value of the feedback factor?

I didnt understand how to find the closed loop gain in my university classes that is why i am asking.