A
Andrew Holme
Also posted to LTSpice Yahoo Group:
This oscillator is "inter-modulated" by SINE voltage V2, even though the
latter is not connected! Is this due to rounding errors in the solver? Is
there any way to reduce the effect?
TIA
Version 4
SHEET 1 2732 740
WIRE 528 -320 352 -320
WIRE 608 -320 528 -320
WIRE 800 -320 688 -320
WIRE 992 -320 896 -320
WIRE 1168 -320 1072 -320
WIRE 352 -288 352 -320
WIRE 800 -288 736 -288
WIRE 960 -288 896 -288
WIRE 1168 -272 1168 -320
WIRE 528 -256 528 -320
WIRE 304 -224 240 -224
WIRE 240 -176 240 -224
WIRE 736 -160 736 -288
WIRE 960 -160 960 -288
WIRE 1168 -160 1168 -192
WIRE 352 -144 352 -192
WIRE 528 -144 528 -192
WIRE 528 -144 352 -144
WIRE 528 -96 528 -144
WIRE 528 0 528 -32
WIRE 624 0 528 0
WIRE 752 0 704 0
WIRE 1072 0 816 0
WIRE 352 16 352 -144
WIRE 1072 32 1072 0
WIRE 528 48 528 0
WIRE 752 64 752 0
WIRE 352 160 352 96
WIRE 528 160 528 112
WIRE 1072 160 1072 112
FLAG 1168 -160 0
FLAG 352 160 0
FLAG 240 -176 0
FLAG 736 -160 0
FLAG 960 -160 0
FLAG 528 160 0
FLAG 1072 160 0
FLAG 752 64 0
SYMBOL voltage 1168 -288 M0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL res 720 -16 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL tline 848 -304 M0
SYMATTR InstName T1
SYMATTR Value Td=2n Z0=50
SYMBOL cap 544 -256 M0
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL cap 544 -96 M0
SYMATTR InstName C2
SYMATTR Value 33p
SYMBOL cap 544 48 M0
SYMATTR InstName C3
SYMATTR Value 33p
SYMBOL res 368 0 M0
SYMATTR InstName R4
SYMATTR Value 220
SYMBOL voltage 1072 16 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value SINE(0 1e-6 105e6)
SYMBOL njf 304 -288 R0
SYMATTR InstName J1
SYMATTR Value 2N3819
SYMBOL res 704 -336 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 0.1
SYMBOL res 1088 -336 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 0.1
TEXT 784 -88 Left 0 !.tran 30u
This oscillator is "inter-modulated" by SINE voltage V2, even though the
latter is not connected! Is this due to rounding errors in the solver? Is
there any way to reduce the effect?
TIA
Version 4
SHEET 1 2732 740
WIRE 528 -320 352 -320
WIRE 608 -320 528 -320
WIRE 800 -320 688 -320
WIRE 992 -320 896 -320
WIRE 1168 -320 1072 -320
WIRE 352 -288 352 -320
WIRE 800 -288 736 -288
WIRE 960 -288 896 -288
WIRE 1168 -272 1168 -320
WIRE 528 -256 528 -320
WIRE 304 -224 240 -224
WIRE 240 -176 240 -224
WIRE 736 -160 736 -288
WIRE 960 -160 960 -288
WIRE 1168 -160 1168 -192
WIRE 352 -144 352 -192
WIRE 528 -144 528 -192
WIRE 528 -144 352 -144
WIRE 528 -96 528 -144
WIRE 528 0 528 -32
WIRE 624 0 528 0
WIRE 752 0 704 0
WIRE 1072 0 816 0
WIRE 352 16 352 -144
WIRE 1072 32 1072 0
WIRE 528 48 528 0
WIRE 752 64 752 0
WIRE 352 160 352 96
WIRE 528 160 528 112
WIRE 1072 160 1072 112
FLAG 1168 -160 0
FLAG 352 160 0
FLAG 240 -176 0
FLAG 736 -160 0
FLAG 960 -160 0
FLAG 528 160 0
FLAG 1072 160 0
FLAG 752 64 0
SYMBOL voltage 1168 -288 M0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL res 720 -16 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL tline 848 -304 M0
SYMATTR InstName T1
SYMATTR Value Td=2n Z0=50
SYMBOL cap 544 -256 M0
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL cap 544 -96 M0
SYMATTR InstName C2
SYMATTR Value 33p
SYMBOL cap 544 48 M0
SYMATTR InstName C3
SYMATTR Value 33p
SYMBOL res 368 0 M0
SYMATTR InstName R4
SYMATTR Value 220
SYMBOL voltage 1072 16 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value SINE(0 1e-6 105e6)
SYMBOL njf 304 -288 R0
SYMATTR InstName J1
SYMATTR Value 2N3819
SYMBOL res 704 -336 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 0.1
SYMBOL res 1088 -336 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 0.1
TEXT 784 -88 Left 0 !.tran 30u