Version 4 SHEET 1 4772 2908 WIRE -32 -1360 -96 -1360 WIRE 384 -1344 256 -1344 WIRE 544 -1344 384 -1344 WIRE 928 -1344 880 -1344 WIRE 1056 -1344 1008 -1344 WIRE 544 -1328 544 -1344 WIRE -96 -1312 -96 -1360 WIRE 256 -1296 256 -1344 WIRE 544 -1200 544 -1248 WIRE 256 -1152 256 -1216 WIRE 416 -1152 256 -1152 WIRE 480 -1152 416 -1152 WIRE 880 -1152 880 -1344 WIRE 192 -1104 160 -1104 WIRE 416 -1072 416 -1088 WIRE 544 -1072 544 -1104 WIRE 544 -1072 416 -1072 WIRE 704 -1072 544 -1072 WIRE 832 -1072 784 -1072 WIRE 112 -992 16 -992 WIRE 208 -992 112 -992 WIRE 112 -944 112 -992 WIRE 256 -912 256 -960 WIRE 368 -912 256 -912 WIRE 416 -912 368 -912 WIRE 736 -912 496 -912 WIRE 880 -912 880 -1056 WIRE 880 -912 736 -912 WIRE 1024 -912 880 -912 WIRE 1120 -912 1024 -912 WIRE 256 -896 256 -912 WIRE 880 -880 880 -912 WIRE -64 -832 -64 -992 WIRE 1120 -832 1120 -912 WIRE 368 -816 368 -912 WIRE 112 -784 112 -864 WIRE 112 -784 64 -784 WIRE 256 -784 256 -816 WIRE 256 -784 224 -784 WIRE 880 -784 880 -800 WIRE 880 -784 832 -784 WIRE 880 -768 880 -784 WIRE 256 -752 256 -784 WIRE 112 -704 112 -784 WIRE 256 -656 256 -672 WIRE 368 -656 368 -736 WIRE 368 -656 256 -656 WIRE 416 -656 368 -656 WIRE 736 -656 496 -656 WIRE 880 -656 880 -688 WIRE 880 -656 736 -656 WIRE 1056 -656 1056 -1344 WIRE 1056 -656 880 -656 WIRE 1120 -656 1120 -752 WIRE 1120 -656 1056 -656 WIRE 256 -624 256 -656 WIRE 256 -608 256 -624 WIRE -64 -592 -64 -752 WIRE 112 -592 112 -624 WIRE 112 -592 16 -592 WIRE 208 -592 112 -592 WIRE 880 -544 880 -656 WIRE 704 -528 544 -528 WIRE 832 -528 784 -528 WIRE 544 -512 544 -528 WIRE 544 -512 464 -512 WIRE 464 -496 464 -512 WIRE 192 -480 160 -480 WIRE 544 -480 544 -512 WIRE 464 -432 256 -432 WIRE 480 -432 464 -432 WIRE 256 -368 256 -432 WIRE 544 -368 544 -384 WIRE -96 -304 -96 -336 WIRE -48 -304 -96 -304 WIRE 0 -304 0 -336 WIRE 0 -304 -48 -304 WIRE -48 -288 -48 -304 WIRE 256 -256 256 -288 WIRE 368 -256 256 -256 WIRE 544 -256 544 -288 WIRE 544 -256 368 -256 WIRE 880 -256 880 -448 WIRE 912 -256 880 -256 WIRE 1024 -256 1024 -912 WIRE 1024 -256 992 -256 FLAG 736 -912 OUT1 FLAG 736 -656 OUT2 FLAG 832 -784 0 FLAG -96 -1232 0 FLAG -32 -1360 out_diff FLAG 64 -784 0 FLAG -48 -288 0 FLAG -96 -416 VP FLAG 0 -416 VN FLAG 384 -1344 VP FLAG 368 -256 VP FLAG 544 -992 VN FLAG 544 -608 VN FLAG 224 -784 VN FLAG 80 -1104 0 FLAG 80 -480 0 SYMBOL voltage -64 -848 R0 WINDOW 123 43 68 Left 2 WINDOW 39 0 0 Left 2 WINDOW 3 16 106 Left 2 WINDOW 0 44 42 Left 2 SYMATTR Value2 AC 1 SYMATTR Value SINE(0 0.21 {Freq}) SYMATTR InstName V5 SYMBOL pnp 480 -1104 M180 SYMATTR InstName Q1 SYMATTR Value BC560C SYMBOL res 528 -1088 R0 SYMATTR InstName R6 SYMATTR Value {RB} SYMBOL voltage 912 -1344 R270 WINDOW 123 0 0 Left 2 WINDOW 39 24 132 Left 2 SYMATTR InstName V2 SYMATTR Value 35 SYMBOL nmos 832 -1152 R0 WINDOW 3 65 4 Left 2 SYMATTR Value 20N20-Tjp SYMATTR InstName M3 SYMBOL res 800 -1088 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 100 SYMBOL res 1104 -848 R0 SYMATTR InstName R10 SYMATTR Value 8 SYMBOL res 864 -896 R0 SYMATTR InstName R7 SYMATTR Value 100 SYMBOL res 864 -784 R0 SYMATTR InstName R9 SYMATTR Value 100 SYMBOL res 96 -960 R0 SYMATTR InstName R8 SYMATTR Value 100k SYMBOL res 32 -1008 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R11 SYMATTR Value 1k SYMBOL pnp 480 -480 R0 SYMATTR InstName Q2 SYMATTR Value BC560C SYMBOL res 528 -512 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R14 SYMATTR Value {RB} SYMBOL voltage 896 -256 M90 WINDOW 123 0 0 Left 2 WINDOW 39 24 132 Left 2 SYMATTR InstName V1 SYMATTR Value 35 SYMBOL nmos 832 -448 M180 WINDOW 3 65 4 Left 2 SYMATTR Value 20N20-Tjp SYMATTR InstName M1 SYMBOL res 800 -512 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R15 SYMATTR Value 100 SYMBOL res 96 -608 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R21 SYMATTR Value 100k SYMBOL res 32 -576 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R22 SYMATTR Value 1k SYMBOL res 528 -1344 R0 SYMATTR InstName R2 SYMATTR Value 47 SYMBOL res 272 -1312 M0 SYMATTR InstName R4 SYMATTR Value {RA} SYMBOL res 528 -384 R0 SYMATTR InstName R5 SYMATTR Value 47 SYMBOL res 272 -384 M0 SYMATTR InstName R12 SYMATTR Value {RA} SYMBOL res 512 -672 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R16 SYMATTR Value 1k SYMBOL bv -96 -1328 R0 SYMATTR InstName B1 SYMATTR Value V=V(OUT2)-V(OUT1) SYMBOL cap 400 -1152 R0 WINDOW 0 -34 13 Left 2 WINDOW 3 -50 49 Left 2 SYMATTR InstName C3 SYMATTR Value 22p SYMBOL cap 448 -496 R0 WINDOW 0 -34 13 Left 2 WINDOW 3 -2 87 Left 2 SYMATTR InstName C4 SYMATTR Value 22p SYMBOL njf 208 -1056 R0 WINDOW 3 56 60 Left 2 SYMATTR Value 2sk170bl_8m SYMATTR InstName J1 SYMBOL njf 208 -528 M180 WINDOW 3 57 38 Left 2 WINDOW 0 56 63 Left 2 SYMATTR Value 2sk170bl_8m SYMATTR InstName J2 SYMBOL res 352 -832 R0 SYMATTR InstName R17 SYMATTR Value 100 SYMBOL voltage -96 -432 M0 WINDOW 123 0 0 Left 2 WINDOW 39 24 132 Left 2 WINDOW 0 33 121 Left 2 WINDOW 3 40 58 Left 2 SYMATTR InstName V4 SYMATTR Value 20 SYMBOL voltage 0 -320 M180 WINDOW 123 0 0 Left 2 WINDOW 39 24 132 Left 2 WINDOW 0 11 6 Left 2 WINDOW 3 39 58 Left 2 SYMATTR InstName V6 SYMATTR Value 20 SYMBOL res 512 -928 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 1k SYMBOL current 256 -896 R0 WINDOW 0 32 40 VTop 2 WINDOW 3 -32 40 VBottom 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName I1 SYMATTR Value 3.8m SYMBOL current 256 -672 R180 WINDOW 0 32 40 VTop 2 WINDOW 3 -32 40 VBottom 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName I2 SYMATTR Value 3.8m SYMBOL npn 192 -1152 R0 WINDOW 0 43 32 Left 2 WINDOW 3 52 57 Left 2 SYMATTR InstName Q3 SYMATTR Value bc550c SYMBOL voltage 176 -1104 M270 WINDOW 123 0 0 Left 2 WINDOW 39 24 132 Left 2 SYMATTR InstName V3 SYMATTR Value 10 SYMBOL npn 192 -432 M180 WINDOW 0 43 32 Left 2 WINDOW 3 52 57 Left 2 SYMATTR InstName Q4 SYMATTR Value bc550c SYMBOL voltage 176 -480 R90 WINDOW 123 0 0 Left 2 WINDOW 39 24 132 Left 2 SYMATTR InstName V7 SYMATTR Value 10 TEXT 1160 -1400 Left 2 !*20N20-Tjp VDMOS with subthreshold (c) Ian Hegglun 21 May 2015\n.model 20N20-Tjp VDMOS (Rg=30 Vto={0.155-1.6m*(Tjp-25)}\n+ Rs={0.12*(1+2.5m*(Tjp-25))} Kp={2.40/(1+7.4m*(Tjp-25))}\n+ Ksubthres={0.09*(1+1m*(Tjp-25))} Mtriode=0.3 Rd=0.16 Lambda=3m\n+ Cgdmax=200p Cgdmin=10p a=0.25 Cgs=1200p Cjo=2200p \n+ m=0.7 VJ=2.5 IS=8.0E-6 N=2.4 mfg=IH150521) TEXT -440 -592 Left 2 !.save Id(J1)\n.save ie(q1)\n.save is(m3)\n.save v(out1)\n.save v(out2)\n.save v(out_diff) TEXT -80 -1456 Left 2 !.MODEL 2sk170bl_8m NJF (AF=500.504m BETA=27.7612M CGD=19.8997p CGS=24p IS=10f\n+ KF=.002229965f LAMBDA=1m RS=8.03465 VTO=-0.60) TEXT 1200 -1168 Left 2 !* BC560C - created March 2, 2011 copyright Cordell Audio\n.MODEL BC560C pnp\n+IS=60e-15 BF=900 VAF=160\n+IKF=0.10 ISE=70e-15 NE=1.42 NF=1\n+RB=170 RC=1.0 RE=0.05\n+CJE=19e-12 MJE=0.3 VJE=0.75\n+CJC=3.9e-12 MJC=0.3 VJC=0.75 FC=0.5\n+TF=600e-12 XTF=7 VTF=4 ITF=0.45\n+TR=10e-9 BR=3 IKR=0\n+EG=1.1 XTB=1.5 XTI=3 NC=2\n+ISC=0 mfg=CA030211 TEXT -528 -824 Left 2 !;.step param RA 200 300 1\n.param RA 210\n.param RB 4703\n;.step param RB 4700 4800 1\n.param RFEED = RJ/10\n;.step param RJ 10 100 1\n.param RJ 47 TEXT -584 -1392 Left 2 !.options plotwinsize=0\n.options numdgt=7\n.param Tjp=Temp\n.temp 40\n.param Freq=10kHz\n.param numcyc=10\n.param dlycyc=0\n.param FFT=32786\n.param simtime=(dlycyc+numcyc)/Freq\n.param dlytime=dlycyc/Freq\n.param numsampl=simtime/Freq/((simtime/numcyc)*FFT)\n.four {Freq} V(out_diff)\n.tran 0 {simtime} {dlytime} {numsampl}\n;ac dec 30 .01 1000meg\n;noise V(Vout) V3 dec 100 .1 1000meg\n;.op TEXT 1192 -712 Left 2 !* BC550C - created March 1, 2011 copyright Cordell Audio\n.MODEL BC550C npn\n+IS=45e-15 BF=689 VAF=162\n+IKF=0.09 ISE=4600e-15 NE=2 NF=0.9965\n+RB=167 RC=1 RE=0.04\n+CJE=18.7e-12 MJE=0.35 VJE=0.75\n+CJC=6.2e-12 MJC=0.25 VJC=0.4 FC=0.5\n+TF=595e-12 XTF=10 VTF=10 ITF=1\n+TR=10e-9 BR=12.2 IKR=0.34\n+EG=1.2 XTB=1.65 XTI=3 NC=0.996\n+NR=1.0 VAR=120 IRB=7e-5 RBM=1.1\n+XCJC=0.6 \n+ISC=5e-15 mfg=CA030111