Version 4
SHEET 1 880 680
WIRE 336 -48 -176 -48
WIRE 336 0 336 -48
WIRE 336 0 240 0
WIRE 432 0 336 0
WIRE 240 32 240 0
WIRE 432 32 432 0
WIRE -176 112 -176 -48
WIRE 240 128 240 112
WIRE 720 128 240 128
WIRE 432 176 432 112
WIRE 720 176 432 176
WIRE 432 192 432 176
WIRE 240 272 240 128
WIRE 336 336 240 336
WIRE 432 336 432 256
WIRE 432 336 336 336
WIRE -176 384 -176 192
WIRE 96 384 -176 384
WIRE 336 384 336 336
WIRE 336 384 96 384
WIRE 96 416 96 384
FLAG 96 416 0
FLAG 720 128 out1
FLAG 720 176 out2
SYMBOL varactor 96 128 R0
SYMATTR InstName D1
SYMATTR Value KV1471
SYMATTR Type diode
SYMBOL varactor 256 336 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value KV1471
SYMATTR Type diode
SYMBOL res 416 16 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res 224 16 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL cap 416 192 R0
SYMATTR InstName C1
SYMATTR Value {X}
SYMBOL voltage -176 96 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 100m 1k)
TEXT -208 440 Left 2 !.tran 2m
TEXT 448 288 Left 2 !.step param X 0 80p 1p