Version 4
SHEET 1 880 680
WIRE -64 -208 -96 -208
WIRE -96 -160 -96 -208
WIRE -96 -48 -96 -80
WIRE 128 48 -96 48
WIRE 352 48 272 48
WIRE -96 80 -96 48
WIRE 352 112 272 112
WIRE -96 192 -96 160
FLAG -96 192 0
FLAG 352 48 sin
FLAG 352 112 cos
FLAG -96 48 Vc
FLAG -96 -48 0
FLAG -64 -208 FMmod
SYMBOL SpecialFunctions\\modulate2 128 48 R0
SYMATTR InstName A1
SYMATTR SpiceLine space={fmin} mark={fmax}
SYMBOL voltage -96 64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 1 200µs 50µ 50µ 200µs 400µ)
SYMBOL bv -96 -176 R0
SYMATTR InstName B1
SYMATTR Value V=sin(({fmin}+V(Vc)*{fmax-fmin})*2*pi*time)
TEXT -128 248 Left 2 !.param fmin 10k\n.param fmax 100k
TEXT -128 320 Left 2 !.tran 0 0.4ms 0 100n
TEXT 8 -168 Left 2 ;Vfm = sin( ft*Vc*t*2*pi )
LINE Normal 288 0 272 0 2
LINE Normal 272 0 288 0 2