Version 4
SHEET 1 992 1140
WIRE -416 496 -416 480
WIRE -416 400 -416 384
WIRE -416 272 -416 256
WIRE -416 256 -496 256
WIRE -16 416 -16 400
WIRE -16 320 -16 304
WIRE -16 688 -16 672
WIRE -16 592 -16 576
WIRE 144 304 128 304
WIRE 128 304 128 224
WIRE 128 224 144 224
WIRE 208 224 224 224
WIRE 224 320 208 320
WIRE 144 336 128 336
WIRE 128 336 128 368
WIRE 48 304 0 304
WIRE -512 592 -512 576
WIRE -512 688 -512 672
WIRE 224 320 224 224
WIRE 160 576 144 576
WIRE 144 576 144 496
WIRE 144 496 160 496
WIRE 224 496 240 496
WIRE 240 592 224 592
WIRE 160 608 144 608
WIRE 144 608 144 640
WIRE 64 576 0 576
WIRE 240 592 240 496
WIRE -256 992 -256 976
WIRE -256 896 -256 880
WIRE -256 880 -192 880
WIRE -256 832 -256 816
WIRE -256 736 -256 720
WIRE -256 720 -192 720
WIRE 0 304 -16 304
WIRE 0 576 -16 576
WIRE -512 576 -448 576
WIRE -496 320 -496 256
WIRE -416 384 -416 352
WIRE -496 416 -496 384
FLAG -416 496 0
FLAG -16 416 0
FLAG -16 688 0
FLAG 128 368 0
FLAG -448 576 gt
FLAG -512 688 0
FLAG 0 304 amp
FLAG 224 224 ampb
FLAG 144 640 0
FLAG 0 576 ang
FLAG 240 496 angb
FLAG -256 992 0
FLAG -192 880 cap
FLAG -256 832 0
FLAG -192 720 res
FLAG -416 384 b
FLAG -496 416 0
SYMBOL bv -416 256 R0
SYMATTR InstName B1
SYMATTR Value V={scl}*cos(2*pi*{freq}*time)
SYMBOL voltage -416 384 R0
SYMATTR InstName V1
SYMATTR Value {bias}
SYMBOL bv -16 304 R0
SYMATTR InstName B3
SYMATTR Value V=V(gt)*0.5*pi*sqrt(I(V1)*I(V1))/{scl}
SYMBOL bv -16 576 R0
SYMATTR InstName B4
SYMATTR Value V=V(gt)*atan2(I(V1), -sin(2*pi*{freq}*time))
SYMBOL Opamps\\opamp 176 256 R0
SYMATTR InstName U1
SYMBOL cap 208 208 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL res 144 288 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL bv -512 576 R0
SYMATTR InstName B2
SYMATTR Value V=(2u <= time) & (time < 12u)
SYMBOL Opamps\\opamp 192 528 R0
SYMATTR InstName U2
SYMBOL cap 224 480 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C2
SYMATTR Value 10n
SYMBOL res 160 560 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL bv -256 880 R0
SYMATTR InstName B6
SYMATTR Value V=if(time >= 12u, 1/(0.9997*2*pi*{freq}*sin(V(angb))/V(ampb)), 0)
SYMBOL bv -256 720 R0
SYMATTR InstName B5
SYMATTR Value V=if(time >= 12u, -cos(V(angb))/V(ampb), 0)
SYMBOL varactor -480 384 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName D1
SYMATTR Value D1SV331
SYMATTR Type diode
TEXT -616 840 Left 0 !.include opamp.sub\n.option plotwinsize=0\n* .params bias=0\n.step param bias 0 5 0.5\n.params freq=10e6 scl=0.1\n.tran 0 12.2u 12.1u 2n
TEXT -608 200 Left 0 !.model D1SV331 D(Is=1.5p Cjo=50.72p Vj=0.862 M=1.353 Fc=0.5 Tt=.5u)