Quick question: Obtaining DC model for OP Amp RC Circuit

Discussion in 'Homework Help' started by gcdc14, Mar 8, 2011.

  1. gcdc14

    Thread Starter New Member

    Mar 8, 2011
    A homework question asks to draw the DC model for a given circuit.
    It has various given capacitor and resistor values, and a Vcc given voltage.
    What procedure or theory would I go about in acquiring a DC model?

    Please note that I am not asking for solutions or anything, just a link or anything explaining how to go about solving this.
    I have searched everywhere, but to no avail.
    I think I may just be having a major brain fart.
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    As a starting point notice that R6 & R7 form a DC voltage divider sourced by the DC supply V1. The divider output is buffered by a unity gain amplifier whose output is fed to the junction of R2 & R4. So this junction of R2 & R4 is biased to the same voltage divider value set by R6 & R7.

    Hope this gives you a few clues to go on with.
    gcdc14 likes this.