Series Regulator circuit question

Discussion in 'Homework Help' started by PonkPonk, Oct 19, 2012.

  1. PonkPonk

    Thread Starter New Member

    Sep 11, 2012
    Hey good folks!

    Consider this circuit..

    What I want to ask is what the Rv resistor does - is this the same as with calculating Rs for a regular Zener diode?

    My textbook doesn't explain this, but it should be very simple since they are in parallell.
    Is this correct interpretation?

    Thank you for your help!
  2. WBahn


    Mar 31, 2012
    Since what are in parallel?

    Q1) What purpose does the series resistor serve in a simple zener-based regulator?

    Q2) What is the purpose/meaning of the voltage at the negative input of the op-amp?

    Q3) What would happen if the Rv resistor were removed (open circuit)?

    Q4) What would happen if the Rv resistor were shorted?