Version 4 SHEET 1 2956 1208 WIRE -448 -304 -480 -304 WIRE -320 -304 -368 -304 WIRE 160 -304 -320 -304 WIRE 1184 -304 160 -304 WIRE 1360 -304 1184 -304 WIRE 160 -240 160 -304 WIRE -320 -192 -320 -304 WIRE 160 -112 160 -160 WIRE 464 -112 160 -112 WIRE 688 -112 464 -112 WIRE 160 -64 160 -112 WIRE 1360 -48 1360 -304 WIRE 688 -16 688 -112 WIRE 464 0 464 -112 WIRE -592 48 -768 48 WIRE 160 48 160 16 WIRE 400 48 160 48 WIRE -320 64 -320 -112 WIRE -768 80 -768 48 WIRE -592 128 -592 48 WIRE -480 128 -480 -304 WIRE -480 128 -592 128 WIRE 1184 128 1184 -304 WIRE -480 176 -592 176 WIRE 464 208 464 96 WIRE 544 208 464 208 WIRE 976 208 976 128 WIRE 976 208 544 208 WIRE 1136 208 976 208 WIRE 160 224 160 48 WIRE -768 240 -768 160 WIRE -592 240 -592 176 WIRE -592 240 -768 240 WIRE -320 256 -320 144 WIRE 128 256 -320 256 WIRE 544 320 544 208 WIRE -320 384 -320 256 WIRE -480 544 -480 176 WIRE -320 544 -320 464 WIRE -320 544 -480 544 WIRE 160 544 160 288 WIRE 160 544 -320 544 WIRE 384 544 160 544 WIRE 544 544 544 400 WIRE 544 544 384 544 WIRE 688 544 688 48 WIRE 688 544 544 544 WIRE 864 544 864 448 WIRE 864 544 688 544 WIRE 1184 544 1184 224 WIRE 1184 544 864 544 WIRE 1360 544 1360 32 WIRE 1360 544 1184 544 WIRE 384 592 384 544 FLAG 976 128 gateshnt FLAG 384 592 0 SYMBOL res -336 -208 R0 SYMATTR InstName R6 SYMATTR Value 8.2E6 SYMBOL res -336 48 R0 SYMATTR InstName R7 SYMATTR Value 8.2E6 SYMBOL res -336 368 R0 SYMATTR InstName R8 SYMATTR Value 100k SYMBOL nmos 1136 128 R0 WINDOW 3 -108 -23 Left 2 SYMATTR Value STW11NM80 SYMATTR InstName M3 SYMBOL voltage -768 64 R0 WINDOW 123 0 0 Left 2 WINDOW 39 24 124 Left 2 WINDOW 3 -162 -101 Left 2 SYMATTR SpiceLine Rser=0.05 SYMATTR Value PWL(0 300 3m 300 3010u 1000 3060u 300) SYMATTR InstName V1 SYMBOL res 1344 -64 R0 SYMATTR InstName R13 SYMATTR Value 1920 SYMBOL ZR431 144 224 R0 SYMATTR InstName X1 SYMBOL res 144 -80 R0 SYMATTR InstName R10 SYMATTR Value 5k1 SYMBOL pnp 400 96 M180 WINDOW 0 63 38 Left 2 WINDOW 3 59 71 Left 2 SYMATTR InstName Q2 SYMATTR Value 2N3906 SYMBOL res 144 -256 R0 SYMATTR InstName R11 SYMATTR Value 2e6 SYMBOL res 528 304 R0 SYMATTR InstName R12 SYMATTR Value 100k SYMBOL zener 704 48 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value UDZV10B SYMATTR Description Diode SYMATTR Type diode SYMBOL res -352 -320 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 10 TEXT 1480 -568 Left 2 !*ZETEX ZR431 Spice Model v1.0 Last Revised 31/3/2005\n * \n *NOTE: This is a simplified Model. Do not rely on this Model for \n *validation of circuit stability. It does not accurately replicate \n *stability boundary conditions with additional load capacitance. \n *Check stability by normal breadboarding techniques.\n *\n .SUBCKT ZR431 1 2 3\n *Connections Vz Vref Gnd\n *Input current\n L2 2 12 2E-9\n Rin 12 13 Rmod1 20E6\n Cin 12 13 1E-12\n D1 13 12 Dmod\n D2 12 11 Dmod\n *Reference voltage, Voltage dependence\n Iref 13 21 2.4985E-3\n Rref 21 13 Rmod2 1000\n G1 21 13 11 13 1.43E-6\n *Gain, time constant and clamp voltage\n G2 13 31 12 21 0.004\n Rt1 31 13 1E8\n Ct1 31 32 800E-12\n Rt2 32 13 2000\n Ct2 31 33 50E-12\n Rt3 33 13 5\n D3 31 13 Dmod\n D4 13 31 Dmod\n *Buffer,Output\n G3 13 41 13 31 0.22\n L1 1 11 2E-9\n Rz 11 42 10\n D5 42 41 Dmod\n D6 13 41 Dmod\n D7 13 11 Dmod\n Rx 13 23 0.5\n L3 3 23 2E-9\n Rq 11 13 Rmod3 74E3\n *\n .MODEL Rmod1 RES (TC1=2.95E-3 TC2=-5E-7)\n .MODEL Rmod2 RES (TC1=8.5E-6 TC2=-3.3E-7)\n .MODEL Rmod3 RES (TC1=-2.5E-3 TC2=2E-5)\n .MODEL Dmod D IS=1E-14 RS=0.1 BV=22 CJO=0.1E-12\n .ENDS ZR431 TEXT 126 656 Left 2 !.tran 0 10m 0 startup