Version 4
SHEET 1 880 680
WIRE 192 -96 192 -128
WIRE 352 -96 352 -128
WIRE -208 -16 -256 -16
WIRE -96 -16 -128 -16
WIRE -64 -16 -96 -16
WIRE 80 -16 16 -16
WIRE -256 16 -256 -16
WIRE 192 16 192 -16
WIRE 352 16 352 -16
WIRE -48 112 -48 96
WIRE -208 128 -256 128
WIRE -96 128 -96 -16
WIRE -80 128 -96 128
WIRE 80 144 80 -16
WIRE 80 144 -16 144
WIRE 128 144 80 144
WIRE 336 144 208 144
WIRE 384 144 336 144
WIRE -736 160 -800 160
WIRE -208 160 -208 128
WIRE -208 160 -656 160
WIRE -80 160 -208 160
WIRE -800 192 -800 160
WIRE -48 192 -48 176
WIRE 336 192 336 144
WIRE -208 208 -208 160
WIRE -800 320 -800 272
WIRE -208 320 -208 288
WIRE 336 320 336 272
FLAG 192 16 0
FLAG 352 16 0
FLAG 192 -128 vcc
FLAG 352 -128 vss
FLAG -48 96 vcc
FLAG -48 192 vss
FLAG -208 320 0
FLAG -256 16 0
FLAG -800 320 0
FLAG 336 320 0
FLAG 384 144 out
IOPIN 384 144 Out
FLAG -256 128 in
IOPIN -256 128 In
SYMBOL voltage 192 -112 R0
SYMATTR InstName V1
SYMATTR Value 7.5V
SYMBOL voltage 352 -112 R0
SYMATTR InstName V2
SYMATTR Value -7.5V
SYMBOL res -80 0 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName RF
SYMATTR Value 768
SYMBOL res -224 0 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName RG
SYMATTR Value 768
SYMBOL res -224 192 R0
SYMATTR InstName RT
SYMATTR Value 50
SYMBOL res -752 176 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R0
SYMATTR Value 50
SYMBOL voltage -800 176 R0
WINDOW 3 25 118 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE ({-ampl*2} {ampl*2} 0 0.5n 0.5n 9.5n 20n)
SYMATTR InstName V3
SYMBOL res 112 160 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName RS
SYMATTR Value 50
SYMBOL res 320 176 R0
SYMATTR InstName RL
SYMATTR Value 50
SYMBOL Robertugo\\OPAMP5 -48 80 R0
SYMATTR InstName U2
SYMATTR SpiceModel ths3201
TEXT -272 -128 Left 0 ;THS3201 Current Feedback Amplifier
TEXT -792 -72 Left 0 !.tran 0 100n 0 20p
TEXT -800 -40 Left 0 !.options plotwinsize=0
TEXT -784 376 Left 0 ;PWL  value_scale_factor=2 (0 0 50n 0 REPEAT FOREVER (0.1n 2 50n 2 50.1n 0 50.2n -2 100n -2 100.1n 0) ENDREPEAT)
TEXT -792 -128 Left 0 !.param ampl=2
TEXT -592 -128 Left 0 ;+/- input voltage
TEXT -792 -376 Left 0 !.meassure TRAN trise TRIG V(out)=-{ampl*0.8} RISE=2 TARG V(out)={ampl*0.8} RISE=2\n.meassure TRAN tfall TRIG V(out)={ampl*0.8} FALL=2 TARG V(out)={-ampl*0.8} FALL=2\n.meassure TRAN twidth TRIG V(out)=0 RISE=2 TARG V(out)=0 FALL=2
TEXT -792 -416 Left 0 ;Measure 20% to 80% rise and fall time on the 2nd edges
TEXT -792 472 Left 0 ;* Alternative method\n.measure TRAN t1 WHEN V(out)=-{ampl*0.8} RISE=2\n.measure TRAN t2 WHEN V(out)={ampl*0.8} RISE=2\n.measure trise1 FIND t2-t1 AT 0