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examples/jigs/2ndOrderLowpass.asc

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+FLAG -864 -128 1
+FLAG 80 48 2
+SYMBOL g -720 -112 R0
+SYMATTR InstName G1
+SYMATTR Value {2/R1}
+SYMBOL res -384 -112 R0
+SYMATTR InstName R2
+SYMATTR Value {R1/2}
+SYMBOL res 32 96 R0
+SYMATTR InstName R4
+SYMATTR Value .1
+SYMBOL ind -464 16 R0
+WINDOW 0 49 27 Left 2
+WINDOW 3 44 58 Left 2
+WINDOW 123 44 86 Left 2
+SYMATTR InstName L1
+SYMATTR Value {L1}
+SYMATTR Value2 Rser={R1/2}
+SYMBOL cap -464 192 R0
+SYMATTR InstName C2
+SYMATTR Value {C1}
+SYMBOL g -128 160 R0
+SYMATTR InstName G4
+SYMATTR Value {10*H}
+SYMBOL Misc\\jumper -928 -192 M0
+SYMATTR InstName X1
+SYMBOL Misc\\jumper 144 -16 R0
+SYMATTR InstName X2
+TEXT 64 -376 Left 2 ;.param f0=1e3 Q=.5
+TEXT -896 -384 Left 2 ;2nd Order Low Pass LTSPICE implementation for f0,  Q,  fn, and Qn set by parameters >>>
+TEXT -800 -328 Left 2 !.param R1=1k
+TEXT -448 -328 Left 2 !.param L1 = R1*Q/(2*pi*f0)
+TEXT -448 -288 Left 2 !.param C1 = 1/(L1*(2*pi*f0)**2)
+TEXT -976 -144 Right 2 ;Vin
+TEXT 192 32 Left 2 ;Vout