Version 4
SHEET 1 880 680
WIRE 224 -144 192 -144
WIRE 432 -144 272 -144
WIRE 624 -144 528 -144
WIRE 704 -144 624 -144
WIRE 800 -144 752 -144
WIRE 48 -128 48 -176
WIRE 624 -128 624 -144
WIRE 272 -112 272 -144
WIRE 432 -112 384 -112
WIRE 576 -112 528 -112
WIRE 752 -112 752 -144
WIRE 224 -96 224 -144
WIRE 704 -96 704 -144
WIRE 48 -16 48 -48
WIRE 224 -16 224 -48
WIRE 272 -16 272 -32
WIRE 624 -16 624 -48
WIRE 704 -16 704 -48
WIRE 752 -16 752 -32
WIRE 128 64 48 64
WIRE 48 112 48 64
WIRE 48 224 48 192
FLAG 48 224 0
FLAG 48 -16 0
FLAG 224 -16 0
FLAG 272 -16 0
FLAG 704 -16 0
FLAG 576 -112 0
FLAG 384 -112 0
FLAG 624 -16 0
FLAG 752 -16 0
FLAG 192 -144 a
FLAG 48 -176 a
FLAG 800 -144 d1
FLAG 128 64 d2
SYMBOL bv 48 96 R0
SYMATTR InstName B1
SYMATTR Value V=delay(V(a),1m)
SYMBOL voltage 48 -144 R0
WINDOW 123 27 123 Left 2
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 0
SYMATTR Value2 AC 1
SYMBOL tline 480 -128 R0
SYMATTR InstName T1
SYMATTR Value Td=1m Z0=50
SYMBOL e 272 -128 R0
SYMATTR InstName E1
SYMATTR Value 1
SYMBOL e 752 -128 R0
SYMATTR InstName E2
SYMATTR Value 1
SYMBOL res 608 -144 R0
SYMATTR InstName R1
SYMATTR Value 50
TEXT 40 -256 Left 2 !.ac dec 100 1 10k