Version 4
SHEET 1 1372 688
WIRE 1088 208 752 208
WIRE 752 240 752 208
WIRE 704 256 576 256
WIRE 576 288 576 256
WIRE 208 304 192 304
WIRE 272 304 208 304
WIRE 528 304 272 304
WIRE 192 320 192 304
WIRE 704 368 704 304
WIRE 832 384 752 384
WIRE 944 384 832 384
WIRE 1088 384 1088 208
WIRE 1088 384 1040 384
WIRE 832 400 832 384
WIRE 192 416 192 400
WIRE 944 416 928 416
WIRE 1072 416 1040 416
WIRE 272 480 272 304
WIRE 288 480 272 480
WIRE 528 480 528 352
WIRE 528 480 384 480
WIRE 528 496 528 480
WIRE 288 512 272 512
WIRE 416 512 384 512
WIRE 832 512 832 480
WIRE 528 608 528 576
FLAG 528 608 0
FLAG 416 512 0
FLAG 272 512 0
FLAG 192 416 0
FLAG 208 304 Vin
FLAG 576 368 0
FLAG 832 512 0
FLAG 1072 416 0
FLAG 928 416 0
FLAG 1088 208 Vout
FLAG 752 320 0
FLAG 704 448 0
FLAG 752 432 0
SYMBOL tline 336 496 R0
SYMATTR InstName T1
SYMATTR Value Td=80n Z0=50
SYMBOL res 512 480 R0
SYMATTR InstName R1
SYMATTR Value 50
SYMBOL voltage 192 304 R0
WINDOW 0 -73 38 Left 0
WINDOW 123 -82 95 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vin
SYMATTR Value2 AC 1
SYMATTR Value ""
SYMBOL e 576 272 R0
WINDOW 0 42 39 Left 0
WINDOW 3 44 69 Left 0
SYMATTR InstName E1
SYMATTR Value 1
SYMBOL tline 992 400 R0
SYMATTR InstName T2
SYMATTR Value Td=20n Z0=50
SYMBOL res 816 384 R0
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL e 752 224 R0
WINDOW 0 42 39 Left 0
WINDOW 3 44 69 Left 0
SYMATTR InstName E2
SYMATTR Value 1
SYMBOL e 704 352 M0
WINDOW 0 42 39 Left 0
WINDOW 3 44 69 Left 0
SYMATTR InstName E3
SYMATTR Value 1
TEXT 232 576 Left 0 !.ac lin 1000 1k 100MEG
TEXT 328 384 Left 0 ;Comb Filter
TEXT 872 256 Left 0 ;fs/4 resonator
TEXT 744 368 Left 0 ;Adding z^-2