Version 4
SHEET 1 1084 1304
WIRE 400 608 400 592
WIRE 400 592 464 592
WIRE -160 608 -160 592
WIRE -96 592 -160 592
WIRE -160 -128 -160 -144
WIRE -160 -144 -144 -144
WIRE 16 -144 32 -144
WIRE 240 -192 240 -240
WIRE 304 -240 240 -240
WIRE 240 -240 240 -256
WIRE 240 -240 192 -240
WIRE 96 -144 112 -144
WIRE 112 -160 112 -144
WIRE 112 -144 176 -144
WIRE 240 -80 240 -96
WIRE -144 -144 -64 -144
WIRE 384 -128 384 -144
WIRE 400 -240 384 -240
WIRE 384 -224 384 -240
WIRE 384 -240 368 -240
WIRE 480 -240 480 -256
WIRE 240 -336 240 -352
WIRE 240 -352 480 -352
WIRE 480 -352 480 -336
WIRE 192 -240 112 -240
WIRE 112 -128 112 -144
WIRE 176 608 176 592
WIRE 176 592 240 592
WIRE 320 1072 320 1056
WIRE 320 1056 384 1056
WIRE 16 864 16 848
WIRE 128 800 160 800
WIRE 160 800 160 816
WIRE 160 800 176 800
WIRE 160 880 160 896
WIRE 32 800 48 800
WIRE -160 816 -160 800
WIRE -160 800 -80 800
WIRE 16 1120 16 1104
WIRE 128 1056 160 1056
WIRE 160 1056 160 1072
WIRE 160 1056 176 1056
WIRE 160 1136 160 1152
WIRE 32 1056 48 1056
WIRE -48 1056 -80 1056
WIRE -80 1056 -80 800
WIRE -80 800 -48 800
WIRE 320 816 320 800
WIRE 320 800 384 800
WIRE 256 288 256 272
WIRE 256 192 256 176
WIRE 256 176 240 176
WIRE 256 176 256 160
WIRE 208 96 176 96
WIRE 176 128 176 208
WIRE 176 208 208 208
WIRE 256 80 256 48
WIRE -160 208 -160 192
WIRE -160 112 112 112
WIRE 544 592 560 592
WIRE 560 592 560 512
WIRE 560 592 576 592
WIRE 560 512 576 512
WIRE 640 512 656 512
WIRE 656 512 656 608
WIRE 656 608 640 608
WIRE 576 624 560 624
WIRE 560 624 560 656
WIRE 576 352 560 352
WIRE 160 208 176 208
WIRE 560 512 560 400
WIRE 640 400 656 400
WIRE 656 400 656 512
WIRE 656 608 672 608
WIRE -16 592 0 592
WIRE 0 592 0 512
WIRE 0 592 16 592
WIRE 0 512 16 512
WIRE 80 512 96 512
WIRE 96 512 96 608
WIRE 96 608 80 608
WIRE 16 624 0 624
WIRE 0 624 0 656
WIRE 16 352 0 352
WIRE 0 512 0 400
WIRE 80 400 96 400
WIRE 96 400 96 512
WIRE 96 608 112 608
FLAG 400 688 0
FLAG -160 688 0
FLAG 240 176 o
FLAG -160 -48 0
FLAG 240 -80 0
FLAG -144 -144 in
FLAG 384 -128 0
FLAG 400 -240 out
FLAG 480 -240 0
FLAG 192 -240 vc
FLAG 112 -48 0
FLAG 176 688 0
FLAG 240 592 rms
FLAG 192 48 out
FLAG 320 1152 0
FLAG 384 1056 U
FLAG 176 800 p1
FLAG 16 944 0
FLAG 160 896 0
FLAG -32 848 0
FLAG -160 896 0
FLAG 176 1056 p2
FLAG 16 1200 0
FLAG 160 1152 0
FLAG -32 1104 0
FLAG 320 896 0
FLAG 384 800 pp
FLAG 208 144 0
FLAG 208 256 0
FLAG 256 288 0
FLAG -160 208 0
FLAG 560 656 0
FLAG 624 352 0
FLAG 560 352 msrb
FLAG 160 208 msrb
FLAG 672 608 avr
FLAG 0 656 0
FLAG 64 352 0
FLAG 0 352 msrb
FLAG 112 608 p0
SYMBOL bv 400 592 R0
WINDOW 0 33 31 Left 0
SYMATTR InstName B1
SYMATTR Value V=-abs(V(o))
SYMBOL bv -160 592 R0
WINDOW 0 30 22 Left 0
SYMATTR InstName B2
SYMATTR Value V=-(V(o)**2)
SYMBOL Misc\\jumper 224 -16 R0
SYMATTR InstName X1
SYMBOL voltage -160 -144 R0
WINDOW 0 33 29 Left 0
WINDOW 3 33 85 Left 0
WINDOW 123 33 57 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 {a} 1e6)
SYMATTR Value2 AC 1m
SYMBOL npn 176 -192 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL res 224 -352 R0
SYMATTR InstName R7
SYMATTR Value 2.2k
SYMBOL res 96 -256 R0
SYMATTR InstName R8
SYMATTR Value 330k
SYMBOL cap 368 -256 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C5
SYMATTR Value 3.3n
SYMBOL cap 96 -160 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C6
SYMATTR Value 2.2n
SYMBOL res 32 -160 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R9
SYMATTR Value 100
SYMBOL res 368 -240 R0
SYMATTR InstName R10
SYMATTR Value 500
SYMBOL voltage 480 -352 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 9
SYMBOL res 96 -144 R0
SYMATTR InstName R11
SYMATTR Value 56k
SYMBOL bv 176 592 R0
WINDOW 0 29 22 Left 0
SYMATTR InstName B6
SYMATTR Value V=sqrt(V(p0))
SYMBOL bv 320 1056 R0
WINDOW 0 29 22 Left 0
SYMATTR InstName B7
SYMATTR Value V={a}
SYMBOL res 144 784 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 100
SYMBOL bv 16 848 R0
WINDOW 0 33 31 Left 0
SYMATTR InstName B3
SYMATTR Value V=V(o) > V(p1)
SYMBOL cap 144 816 R0
SYMATTR InstName C3
SYMATTR Value 100p
SYMBOL sw -64 800 R270
WINDOW 0 46 7 VRight 0
WINDOW 3 45 68 VRight 0
SYMATTR InstName S1
SYMATTR Value bSW
SYMBOL bv -160 800 R0
WINDOW 3 -27 137 Left 0
SYMATTR Value V=V(o)
SYMATTR InstName B4
SYMBOL res 144 1040 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 100
SYMBOL bv 16 1104 R0
WINDOW 0 33 31 Left 0
SYMATTR InstName B5
SYMATTR Value V=V(o) < V(p2)
SYMBOL cap 144 1072 R0
SYMATTR InstName C4
SYMATTR Value 100p
SYMBOL sw -64 1056 R270
WINDOW 0 46 7 VRight 0
WINDOW 3 45 68 VRight 0
SYMATTR InstName S2
SYMATTR Value bSW
SYMBOL bv 320 800 R0
SYMATTR InstName B8
SYMATTR Value V=V(p1)-V(p2)
SYMBOL sw 256 176 M180
SYMATTR InstName S3
SYMATTR Value bSW
SYMBOL sw 256 288 M180
SYMATTR InstName S4
SYMATTR Value bSW
SYMBOL Digital\\buf 112 48 R0
WINDOW 0 -9 16 Left 0
SYMATTR InstName A1
SYMBOL voltage -160 96 R0
WINDOW 0 33 37 Left 0
WINDOW 3 -34 159 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value PULSE(0 1 {t1} 2n 2n 1)
SYMBOL Opamps\\opamp 608 544 R0
SYMATTR InstName U1
SYMBOL res 560 576 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL cap 640 496 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C7
SYMATTR Value 10n
SYMBOL sw 656 400 R90
WINDOW 0 -64 53 VRight 0
WINDOW 3 46 28 VRight 0
SYMATTR InstName S5
SYMATTR Value bSW
SYMBOL Opamps\\opamp 48 544 R0
SYMATTR InstName U2
SYMBOL res 0 576 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL cap 80 496 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL sw 96 400 R90
WINDOW 0 -64 53 VRight 0
WINDOW 3 46 28 VRight 0
SYMATTR InstName S6
SYMATTR Value bSW
TEXT 304 -88 Left 0 !* .ac oct 50 1k 100e6\n* .tran 300u
TEXT -184 -416 Left 0 !.include opamp.sub\n.model bSW SW(Ron=1 Roff=1e16 Vt=0.5 Vh=-0.4)\n.param t1=50u t2=60u\n* .param a=10m\n.step param a 5m 40m 5m\n.tran 0 {t2} {t2-100n} 1n