Re: JFET (lower VD as VG)
Sorry, this simple problem is solved, but I have a major problem... I hope, that´s last... At fourier analysis, there is 48 mV voltage with 0 Hz frequency... Why? Thanks.
My .cir file:
*
*
V1zdroj 14 0 15V
V2zdroj 15 0 -15V
Vinzdroj 1 0 AC 10mV sin 1 1mv 100HZ
*Vinzdroj 1 0 PWL (0m,10m)(10m,50m)(20m,10m)(30m,2m)(40m,10m);
*
*
R1 2 0 1MEG;
R2 3 0 1.5k;
R3 14 4 5.6k;
R4 5 6 100k;
R5 13 9 1MEG;
R6 9 0 1MEG;
R7 14 10 2.2MEG;
R8 7 8 10k;
R9 8 12 1MEG;
R10 10 11 10k;
C1 1 2 100n;
C2 4 5 100n;
C3 3 0 47u;
C4 9 0 10u;
C5 6 7 100n;
C6 11 12 100n;
JT1 4 2 3 BF245A;
JT2 6 13 14 BF245A;
QT3 9 10 14 BC557A;
X1 0 8 14 15 12 LM358;
*
.lib jfet.lib
.lib ebipolar.lib
.lib opamp.lib
*
*
.DC LIN V1zdroj 30V -15V 1V
.AC LIN 50 1 500k
.FOUR 100 V(12)
.tran 100u 100m
.OP
.probe
.end