Bandgap Voltage with Op Amp & BJT Widlar Current Mirror Circuit

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  • Опубліковано 3 січ 2025

КОМЕНТАРІ • 5

  • @STEMprof
    @STEMprof  Рік тому +3

    This analog circuit's output voltage value computes the nested logarithm of a nested exponentiation of the relative value of resistors. A combination of virtual short, KVL and BJT transistor properties and equation Vbe=Vt*ln(collector current / saturation current) is used to analyze the circuit and to prove the closed form formula for the output voltage. Audio and Video quality are double-checked and are working alright.

  • @PetruMaurovlachu
    @PetruMaurovlachu Рік тому +2

    isnt this circuit a modification of the kujik bandgap reference?

    • @STEMprof
      @STEMprof  Рік тому +3

      Thanks Peter for watching and for the comment. It can be stated as a variant of Kuijk bandgap voltage reference. If you are interested in voltage regulators, then check this example: ua-cam.com/video/rI9f6-DyXxQ/v-deo.html

    • @PetruMaurovlachu
      @PetruMaurovlachu Рік тому +2

      @@STEMprof nice videos 👍

    • @STEMprof
      @STEMprof  11 місяців тому +1

      ​@@PetruMaurovlachu Thanks Peter. Here is another example of Band-Gap Voltage Reference Diode ua-cam.com/video/qYOe7JOidHk/v-deo.html . I hope it is interesting as well.