Version 4
SHEET 1 1340 680
WIRE -368 144 -368 112
WIRE -368 256 -368 224
WIRE -144 144 -144 112
WIRE -144 256 -144 224
WIRE 128 480 128 432
WIRE 128 608 128 560
WIRE 144 128 144 80
WIRE 144 256 144 208
WIRE 208 432 128 432
WIRE 224 80 144 80
WIRE 448 -112 416 -112
WIRE 544 128 544 80
WIRE 544 256 544 208
WIRE 544 480 544 432
WIRE 544 608 544 560
WIRE 624 80 544 80
WIRE 624 432 544 432
WIRE 640 -112 592 -112
WIRE 704 -176 592 -176
FLAG -144 256 0
FLAG -368 256 0
FLAG -368 112 AM
FLAG -144 112 CR
FLAG 144 256 0
FLAG 224 80 out_b
IOPIN 224 80 Out
FLAG 416 -112 AM
FLAG 704 -176 out_m
IOPIN 704 -176 Out
FLAG 640 -112 out_mc
IOPIN 640 -112 Out
FLAG 544 608 0
FLAG 624 432 out_p
IOPIN 624 432 Out
FLAG 544 256 0
FLAG 624 80 out_t
IOPIN 624 80 Out
FLAG 128 608 0
FLAG 208 432 out_py
IOPIN 208 432 Out
SYMBOL voltage -144 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 1 1e6)
SYMBOL voltage -368 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value SINE(0 1 1e4)
SYMBOL bv 144 112 R0
SYMATTR InstName B1
SYMATTR Value V=V(CR)*V(AM)
SYMBOL SpecialFunctions\\modulate2 448 -176 R0
WINDOW 39 29 119 Left 0
SYMATTR SpiceLine mark=1e6 space=0
SYMATTR InstName A1
SYMBOL Misc\\Epoly 544 464 R0
SYMATTR InstName E1
SYMATTR Value VALUE={V(CR)*V(AM)}
SYMBOL bv 544 112 R0
SYMATTR InstName B2
SYMATTR Value V=sin(2*pi*1e6*time)*V(AM)
SYMBOL Misc\\Epoly 128 464 R0
SYMATTR InstName E2
SYMATTR Value POLY(2) (CR,0) (AM,0) 0 0 0 0 1
TEXT -400 -80 Left 0 !.tran 100e-6
TEXT -400 -48 Left 0 !.options plotwinsize=0
TEXT 464 -312 Left 0 ;The great MODULATOR\nwith optional FM input
TEXT -392 -416 Left 0 ;Amplitude Modulation Example \n \nFour methods presented how to modulate the \namplitude of a carrier with 1MHz frequency.\n \nV(out_b), V(out_p), V(out_m), V(out_t) give the same output.\n \nThe MODULATOR A1 can be used to generate an AM signal\nwith any phase offset by combining the SIN and COS output.\nV(out_mc) is 90 degree in advance.
TEXT 544 376 Left 0 ;PSPICE syntax
TEXT 624 504 Left 0 ;Epoly.asy
TEXT 584 264 Left 0 ;Carrier: sin(2*pi*1e6*time)
TEXT 152 384 Left 0 ;SPICE 2G6
TEXT 208 512 Left 0 ;Epoly.asy
TEXT 624 160 Left 0 ;bv.asy
TEXT 208 160 Left 0 ;bv.asy
TEXT 584 -224 Left 0 ;modulate2.asy