Version 4 SHEET 1 1880 1188 WIRE 208 64 -112 64 WIRE 384 64 208 64 WIRE 720 64 384 64 WIRE 896 64 720 64 WIRE 208 96 208 64 WIRE 384 96 384 64 WIRE 720 96 720 64 WIRE 896 96 896 64 WIRE 208 192 208 176 WIRE 256 192 208 192 WIRE 384 192 384 176 WIRE 432 192 384 192 WIRE 720 192 720 176 WIRE 768 192 720 192 WIRE 896 192 896 176 WIRE 944 192 896 192 WIRE -112 256 -112 64 WIRE 208 304 208 192 WIRE 384 304 384 192 WIRE 720 304 720 192 WIRE 896 304 896 192 WIRE -112 432 -112 336 WIRE 208 432 208 368 WIRE 384 432 384 368 WIRE 720 432 720 368 WIRE 896 432 896 368 FLAG 208 432 0 FLAG -112 432 0 FLAG 256 192 Unidir FLAG 384 432 0 FLAG 432 192 Bidir FLAG 896 432 0 FLAG 944 192 Bidir2 FLAG 720 432 0 FLAG 768 192 Unidir2 SYMBOL voltage -112 240 R0 WINDOW 123 0 0 Left 0 WINDOW 39 24 132 Left 0 SYMATTR SpiceLine Rser=1m SYMATTR InstName V1 SYMATTR Value 1 SYMBOL res 192 80 R0 SYMATTR InstName R2 SYMATTR Value 10 SYMBOL res 368 80 R0 SYMATTR InstName R3 SYMATTR Value 10 SYMBOL res 880 80 R0 SYMATTR InstName R1 SYMATTR Value 10 SYMBOL res 704 80 R0 SYMATTR InstName R4 SYMATTR Value 10 SYMBOL Xtransil_ST_BI 400 304 M0 SYMATTR InstName U3 SYMBOL Xtransil_ST_BI 736 304 M0 SYMATTR InstName U4 SYMATTR SpiceModel SMBJ33A SYMBOL Xtransil_ST 224 368 R180 SYMATTR InstName U1 SYMBOL Xtransil_ST 912 368 R180 SYMATTR InstName U2 SYMATTR SpiceModel SMBJ33CA TEXT -112 48 Left 0 !.dc V1 -50 50 TEXT 656 -24 Left 0 ;Caution!\nU2 and U4 work but the Symbols \ndonīt match the Device.. TEXT 640 264 Left 0 ;No! TEXT 824 264 Left 0 ;No! TEXT 272 16 Left 0 ;Ok LINE Normal 544 448 544 -32 1