* C:\Program Files\LTC\LTspiceIV\homework 9.asc
Vg 1 0 12 AC 1
L 2 4 4µ
R 4 0 1
C 4 0 100µ
XU3 Vc N003 N005 N006 5 CPM Rf=.1 Va=0.3125 L=4u fs=100k
E2 N005 0 1 4 1
E3 N006 0 4 0 1
H1 N003 0 value={i(L)}
XU1 1 2 2 0 5 CCM-DCM1 L=4uH fs=100k
XU2 N001 N004 Vc opamp Aol=100K GBW=10Meg
R1 4 N001 10k
R2 N001 N002 9.1k
C2 Vc N002 11n
C1 Vc N001 700p
Vref N004 0 5
.lib switch.lib
.ac dec 101 10 100k
.lib opamp.sub
.backanno
.end
--------------------------
With a higher value for R (around 10 ohms) spice can resolve to a DC operating point. At R = 1 I get "Failed to find DC finding operating points for AC analysis".
Any suggestions?
I have tried (most) of the suggestions listed.
Perhaps look at recalculating Va = Ma*Ts. My value for Va was over an order of magnitude larger than yours. I dumped your netlist into LTspice and increased the value -- ran for me.
ReplyDeleteRegards,
Dave
I got Va = Ma*Ts*Rf, which is maybe why my Va was smaller.
ReplyDelete