Recent content by darkbasic

  1. darkbasic

    Why Are My Colpitts Oscillator PSPICE Simulations Inconsistent?

    Finally I found the problem(s), there were many of them! 1) The biggest one were the initial conditions. After selecting "Skip the initial transient bias point calculation" (SKIPBP) in PSpice simulation's options everything got better. 2) Another big problem was in the math: I didn't size...
  2. darkbasic

    Why Are My Colpitts Oscillator PSPICE Simulations Inconsistent?

    [FONT=Georgia] Hi, I'm trying to simulate exercise 13.21(a) from Sedra-Smith, with: Vcc=5V f=100 kHz [FONT=Georgia]and the following BJT model: .model modn NPN(Is=6.734f Xti=3 Eg=1.11 Vaf=74.03 Bf=416.4 Ne=1.259 Ise=6.734f Ikf=66.78m Xtb=1.5 Br=.7371 Nc=2 Isc=0 Ikr=0 Rc=1 Cjc=3.638p Mjc=.3085...
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