how do I calculate I(t) for capacitor when R3 is also present

Discussion in 'General Electronics Chat' started by PG1995, Oct 27, 2011.

  1. PG1995

    Thread Starter Active Member

    Apr 15, 2011
    753
    5
    Hi

    Please have a look on the attachment, you can find my question there with other details. Thanks a lot.

    Regards
    PG
     
  2. joeyd999

    AAC Fanatic!

    Jun 6, 2011
    2,692
    2,756
    R1 & R3 form a voltage divider, giving you a new Vth & Rth (the thevinin equivalent of R1, R3 and your 2.0V Vin.

    Redraw your circuit using the thevinen equivalents and your solution will be obvious.

    Do the same for your switch 2 position to discover the discharge timing.
     
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