filter rise time calculator

Version 4 SHEET 1 1016 680 WIRE 672 -128 416 -128 WIRE 848 -112 736 -112 WIRE 864 -112 848 -112 WIRE 672 -64 592 -64 WIRE 416 -48 416 -128 WIRE 528 -48 416 -48 WIRE 64 128 -16 128 WIRE 224 128 144 128 WIRE 272 128 224 128 WIRE 416 128 416 -48 WIRE 416 128 352 128 WIRE 480 128 416 128 WIRE 656 128 480 128 WIRE 880 128 752 128 WIRE 928 128 880 128 WIRE 656 160 624 160 WIRE 784 160 752 160 WIRE -16 176 -16 128 WIRE 928 176 928 128 WIRE 224 192 224 128 WIRE 416 192 416 128 WIRE 624 208 624 160 WIRE 784 208 784 160 WIRE -16 304 -16 256 WIRE 224 304 224 256 WIRE 416 304 416 256 WIRE 928 304 928 256 FLAG -16 304 0 FLAG 224 304 0 FLAG 416 304 0 FLAG 624 208 0 FLAG 784 208 0 FLAG 928 304 0 FLAG 480 128 OUT FLAG 880 128 EOL FLAG 848 -112 RISETIME SYMBOL res 48 144 R270 WINDOW 0 83 61 VTop 2 WINDOW 3 73 59 VBottom 2 SYMATTR InstName R1 SYMATTR Value 50 SYMBOL cap 208 192 R0 WINDOW 0 -62 23 Left 2 WINDOW 3 -66 58 Left 2 SYMATTR InstName C1 SYMATTR Value 7p SYMBOL cap 400 192 R0 WINDOW 0 -61 17 Left 2 WINDOW 3 -60 54 Left 2 SYMATTR InstName C2 SYMATTR Value 7p SYMBOL ind 256 144 R270 WINDOW 0 82 52 VTop 2 WINDOW 3 74 54 VBottom 2 SYMATTR InstName L1 SYMATTR Value 22n SYMBOL voltage -16 160 R0 WINDOW 0 35 123 Left 2 WINDOW 3 -19 187 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value PULSE(0 2.1 1n 400p 400p 4n) SYMBOL tline 704 144 R0 WINDOW 0 -2 -72 Bottom 2 WINDOW 3 -3 -62 Top 2 SYMATTR InstName T1 SYMATTR Value Td=5n Z0=50 SYMBOL res 912 160 R0 WINDOW 0 57 40 Left 2 WINDOW 3 56 75 Left 2 SYMATTR InstName R3 SYMATTR Value 200 SYMBOL Digital\\xor 720 -160 R0 WINDOW 0 -103 62 Left 2 SYMATTR InstName A1 SYMATTR SpiceLine vhigh=0.2 SYMBOL Digital\\xor 576 -112 R0 WINDOW 0 -105 35 Left 2 SYMATTR InstName A2 SYMATTR SpiceLine vhigh=1.8 TEXT 160 0 Left 2 !.tran 10n TEXT 152 -88 Left 2 ;Output Filter TEXT 128 -48 Left 2 ;JL April 11 2021 TEXT 544 16 Left 2 ;0.9v TEXT 688 -32 Left 2 ;0.1v