RF MTO

*.AC DEC 2000 10KHZ 10MEG
*VIN 20 0 DC 0 AC 1V

* Grid 2 connected to the source
X1 4 3 1 3 MN201
* Source Circuit
C50 3 0 0.047U
R56 3 0 330OHM
* Gate Circuit
D12 1 0 D1N4448
.MODEL D1N4448  D(Is=0.1p Rs=2 CJO=2p Tt=12n Bv=100 Ibv=0.1p)
.MODEL D1N914 D (IS=3.93E-9 RS=1 BV=100V IBV=5E-6 CJO=1.7PF TT=2NS)
R55 1 0 100KOHM
*          85-??-??   Original library
* Drain Circuit
R52 4 5 22OHM
LDA 5 6 4.36MH
LDB 7 10 10MH
CA 7 0 20P
KXFR LDA LDB 0.9
R51 6 9 220OHM
C45 6 0 0.1U
* PSU
V1 9 0 DC 12V PULSE ( 0 12 0 0.1ms 0)
* Grid Circuit
RFIX 10 0 200KOHM
C47 10 1 100P
C78 10 0 6P
C46 10 0 200P
* Isolating Cap in turret
*VIN 1 0 DC 0 AC  SIN ( 0 10MV 300K 0 1E4)
R100 20 1 75OHM
.OP
*.PLOT TRAN V(1)
.TRAN 5US 10MS

.SUBCKT MN201 1      2     3     4
*Connections  Drain  Gate2 Gate1 Source
*Dual Gate Mosfet
MD1 5 3 4 4 MN201-1
MD2 1 2 5 4 MN201-2 W=35U
.MODEL MN201-1 NMOS (LEVEL=1 VTO=-1.45 KP=11.8M GAMMA=3.26U
+ PHI=.75 LAMBDA=30M RD=1M RS=20.8 IS=25F PB=.8 MJ=.46
+ CBD=6.64P CBS=7.97P CGSO=168P CGDO=140P CGBO=32.6N)
.MODEL MN201-2 NMOS (LEVEL=1 VTO=-1.00 KP=12.5M GAMMA=27.26U
+ PHI=.75 LAMBDA=37M RD=15.3 RS=1M IS=30F PB=.8 MJ=.46
+ CBD=6.64P CBS=7.97P CGSO=168P CGDO=140P CGBO=32.6N)
* Motorola
* N-Channel Depletion DG-MOSFET 
.ENDS