The new and improved version with fewer components is 127dB down at 2kHz and lower than that elsewhere.
Bill is invited to improve it by changing the FET to a current mirror circuit.
Version 4.1 SHEET 1 3828 932 WIRE 976 -816 816 -816 WIRE 1056 -816 1056 -848 WIRE 880 -752 880 -768 WIRE 976 -736 976 -816 WIRE 976 -736 912 -736 WIRE 816 -720 816 -816 WIRE 816 -720 720 -720 WIRE 848 -720 816 -720 WIRE 1056 -704 1056 -736 WIRE 1056 -704 912 -704 WIRE 336 -672 256 -672 WIRE 480 -672 400 -672 WIRE 720 -672 720 -720 WIRE 1056 -672 1056 -704 WIRE 1168 -672 1056 -672 WIRE 880 -656 880 -688 WIRE 1056 -656 1056 -672 WIRE 1168 -640 1168 -672 WIRE 256 -576 256 -672 WIRE 336 -576 256 -576 WIRE 480 -576 480 -672 WIRE 480 -576 416 -576 WIRE 1056 -544 1056 -576 WIRE 1168 -544 1168 -576 WIRE -192 -480 -192 -512 WIRE 384 -464 384 -480 WIRE 480 -448 480 -576 WIRE 480 -448 416 -448 WIRE 576 -448 480 -448 WIRE 720 -448 720 -592 WIRE 720 -448 576 -448 WIRE 1168 -448 720 -448 WIRE 1664 -448 1168 -448 WIRE 2256 -448 1664 -448 WIRE 256 -432 256 -576 WIRE 352 -432 256 -432 WIRE 448 -416 416 -416 WIRE 464 -416 448 -416 WIRE 576 -400 576 -448 WIRE 1168 -400 1168 -448 WIRE -416 -384 -416 -480 WIRE 1664 -384 1664 -448 WIRE 2256 -384 2256 -448 WIRE -336 -368 -336 -400 WIRE 384 -368 384 -400 WIRE 1376 -368 1328 -368 WIRE 1520 -368 1456 -368 WIRE 1968 -368 1920 -368 WIRE 2112 -368 2048 -368 WIRE 16 -352 -144 -352 WIRE 576 -288 576 -320 WIRE 1168 -288 1168 -320 WIRE -336 -272 -336 -304 WIRE -80 -272 -80 -304 WIRE 1328 -272 1328 -368 WIRE 1376 -272 1328 -272 WIRE 1520 -272 1520 -368 WIRE 1520 -272 1440 -272 WIRE 1664 -272 1664 -304 WIRE 1920 -272 1920 -368 WIRE 1968 -272 1920 -272 WIRE 2112 -272 2112 -368 WIRE 2112 -272 2032 -272 WIRE 2256 -272 2256 -304 WIRE -144 -256 -144 -352 WIRE -112 -256 -144 -256 WIRE 16 -240 16 -352 WIRE 16 -240 -48 -240 WIRE 48 -240 16 -240 WIRE 64 -240 48 -240 WIRE 256 -240 256 -432 WIRE -192 -224 -192 -400 WIRE -112 -224 -192 -224 WIRE -416 -208 -416 -304 WIRE 976 -192 880 -192 WIRE 1168 -192 1168 -224 WIRE 1168 -192 1040 -192 WIRE -192 -176 -192 -224 WIRE -192 -176 -256 -176 WIRE -80 -176 -80 -208 WIRE 1408 -160 1408 -176 WIRE 2000 -160 2000 -176 WIRE -192 -144 -192 -176 WIRE 1328 -144 1328 -272 WIRE 1328 -144 1264 -144 WIRE 1376 -144 1328 -144 WIRE 1920 -144 1920 -272 WIRE 1920 -144 1856 -144 WIRE 1968 -144 1920 -144 WIRE -256 -128 -256 -176 WIRE 1520 -128 1520 -272 WIRE 1520 -128 1440 -128 WIRE 1664 -128 1664 -208 WIRE 1664 -128 1520 -128 WIRE 2112 -128 2112 -272 WIRE 2112 -128 2032 -128 WIRE 2256 -128 2256 -208 WIRE 2256 -128 2112 -128 WIRE 1264 -112 1264 -144 WIRE 1376 -112 1328 -112 WIRE 1856 -112 1856 -144 WIRE 1968 -112 1920 -112 WIRE 448 -96 384 -96 WIRE 576 -96 576 -224 WIRE 576 -96 512 -96 WIRE 880 -96 880 -192 WIRE 976 -96 880 -96 WIRE 1168 -96 1168 -192 WIRE 1168 -96 1056 -96 WIRE 208 -80 160 -80 WIRE 256 -80 256 -160 WIRE 256 -80 208 -80 WIRE 1408 -64 1408 -96 WIRE 2000 -64 2000 -96 WIRE -256 -32 -256 -64 WIRE -192 -32 -192 -64 WIRE 160 -32 160 -80 WIRE 384 0 384 -96 WIRE 448 0 384 0 WIRE 576 0 576 -96 WIRE 576 0 528 0 WIRE 880 0 880 -96 WIRE 928 0 880 0 WIRE 1040 0 1008 0 WIRE 1168 0 1168 -96 WIRE 1168 0 1120 0 WIRE 256 64 256 -80 WIRE 464 96 464 80 WIRE 128 112 112 112 WIRE 160 112 160 48 WIRE 160 112 128 112 WIRE 192 112 160 112 WIRE 304 112 288 112 WIRE 336 112 304 112 WIRE 384 112 384 0 WIRE 384 112 336 112 WIRE 432 112 384 112 WIRE 960 112 960 96 WIRE 576 128 576 0 WIRE 576 128 496 128 WIRE 640 128 576 128 WIRE 672 128 640 128 WIRE 752 128 736 128 WIRE 880 128 880 0 WIRE 880 128 832 128 WIRE 928 128 880 128 WIRE 400 144 384 144 WIRE 432 144 400 144 WIRE 1168 144 1168 0 WIRE 1168 144 992 144 WIRE 1328 144 1328 -112 WIRE 1760 144 1328 144 WIRE 1920 144 1920 -112 WIRE 2352 144 1920 144 WIRE 928 160 880 160 WIRE 112 192 112 112 WIRE 192 192 112 192 WIRE 336 192 336 112 WIRE 336 192 272 192 WIRE 464 192 464 160 WIRE 960 208 960 176 WIRE 640 256 640 128 WIRE 1264 256 1264 -32 WIRE 1264 256 640 256 WIRE 112 288 112 192 WIRE 192 288 112 288 WIRE 336 288 272 288 WIRE 464 288 416 288 WIRE 1168 288 1168 144 WIRE 1168 288 464 288 WIRE 1856 288 1856 -32 WIRE 1856 288 1168 288 WIRE 2432 288 1856 288 WIRE 2560 288 2512 288 WIRE 2720 288 2624 288 WIRE 2784 288 2720 288 WIRE 880 352 880 160 WIRE 1168 352 880 352 WIRE 1664 352 1664 -128 WIRE 1664 352 1344 352 WIRE 2256 352 2256 -128 WIRE 2256 352 1936 352 WIRE 2784 352 2784 288 WIRE 640 368 640 256 WIRE 720 368 640 368 WIRE 464 400 464 288 WIRE 640 400 640 368 WIRE 720 400 720 368 WIRE 1344 400 1344 352 WIRE 1936 400 1936 352 WIRE 2784 448 2784 432 WIRE 1024 480 1008 480 WIRE 1056 480 1024 480 WIRE 1168 480 1168 352 WIRE 1168 480 1136 480 WIRE 1600 480 1568 480 WIRE 1648 480 1600 480 WIRE 1760 480 1760 144 WIRE 1760 480 1728 480 WIRE 2192 480 2160 480 WIRE 2240 480 2192 480 WIRE 2352 480 2352 144 WIRE 2352 480 2320 480 WIRE 640 512 640 480 WIRE 720 512 720 480 WIRE 720 512 640 512 WIRE 464 528 464 480 WIRE 640 528 640 512 WIRE 1344 528 1344 480 WIRE 1936 528 1936 480 WIRE 848 544 832 544 WIRE 1024 544 912 544 WIRE 1440 544 1424 544 WIRE 1616 544 1504 544 WIRE 2032 544 2016 544 WIRE 2208 544 2096 544 WIRE 944 624 944 592 WIRE 1536 624 1536 592 WIRE 2128 624 2128 592 WIRE 464 640 464 592 WIRE 832 640 832 544 WIRE 832 640 464 640 WIRE 912 640 832 640 WIRE 1344 640 1344 592 WIRE 1424 640 1424 544 WIRE 1424 640 1344 640 WIRE 1504 640 1424 640 WIRE 1936 640 1936 592 WIRE 2016 640 2016 544 WIRE 2016 640 1936 640 WIRE 2096 640 2016 640 WIRE 464 656 464 640 WIRE 464 656 320 656 WIRE 1024 656 1024 544 WIRE 1024 656 976 656 WIRE 1056 656 1024 656 WIRE 1168 656 1168 480 WIRE 1168 656 1136 656 WIRE 1616 656 1616 544 WIRE 1616 656 1568 656 WIRE 1648 656 1616 656 WIRE 1760 656 1760 480 WIRE 1760 656 1728 656 WIRE 2208 656 2208 544 WIRE 2208 656 2160 656 WIRE 2240 656 2208 656 WIRE 2352 656 2352 480 WIRE 2352 656 2320 656 WIRE 640 672 640 592 WIRE 912 672 640 672 WIRE 1504 672 1456 672 WIRE 2096 672 2048 672 WIRE 464 704 464 656 WIRE 464 704 416 704 WIRE 640 704 640 672 WIRE 640 704 592 704 WIRE 1168 704 1168 656 WIRE 1344 704 1344 640 WIRE 1344 704 1296 704 WIRE 1760 704 1760 656 WIRE 1936 704 1936 640 WIRE 1936 704 1888 704 WIRE 2352 704 2352 656 WIRE 464 720 464 704 WIRE 640 720 640 704 WIRE 944 720 944 688 WIRE 1344 720 1344 704 WIRE 1536 720 1536 688 WIRE 1936 720 1936 704 WIRE 2128 720 2128 688 WIRE 416 736 416 704 WIRE 592 736 592 704 WIRE 1296 736 1296 704 WIRE 1888 736 1888 704 WIRE 1168 784 1168 768 WIRE 1760 784 1760 768 WIRE 2352 784 2352 768 WIRE 416 832 416 800 WIRE 464 832 464 800 WIRE 464 832 416 832 WIRE 592 832 592 800 WIRE 640 832 640 800 WIRE 640 832 592 832 WIRE 1296 832 1296 800 WIRE 1344 832 1344 800 WIRE 1344 832 1296 832 WIRE 1888 832 1888 800 WIRE 1936 832 1936 800 WIRE 1936 832 1888 832 WIRE 464 864 464 832 WIRE 640 864 640 832 WIRE 1344 864 1344 832 WIRE 1936 864 1936 832 WIRE 320 912 320 656 WIRE 1456 912 1456 672 WIRE 1456 912 320 912 WIRE 2048 912 2048 672 WIRE 2048 912 1456 912 FLAG 384 -480 V+ FLAG 464 80 V+ FLAG 960 96 V+ FLAG 208 -80 gate FLAG 128 112 drn FLAG 2784 448 0 FLAG 2720 288 output FLAG -416 -208 0 FLAG 384 -368 0 FLAG 464 192 0 FLAG 960 208 0 FLAG -416 -480 V+ FLAG 448 -416 half FLAG 400 144 half FLAG 1024 480 half FLAG -80 -176 0 FLAG -80 -304 V+ FLAG 48 -240 half FLAG -192 -32 0 FLAG -192 -512 V+ FLAG -256 -32 0 FLAG 304 112 src FLAG 880 -768 V+ FLAG 880 -656 0 FLAG 1056 -544 0 FLAG 1056 -848 V+ FLAG 1168 -544 0 FLAG 1168 784 0 FLAG 464 864 0 FLAG 944 592 V+ FLAG 944 720 0 FLAG 1408 -176 V+ FLAG 1408 -64 0 FLAG 1600 480 half FLAG 1760 784 0 FLAG 1344 864 0 FLAG 1536 592 V+ FLAG 1536 720 0 FLAG 2000 -176 V+ FLAG 2000 -64 0 FLAG 2192 480 half FLAG 2352 784 0 FLAG 1936 864 0 FLAG 2128 592 V+ FLAG 2128 720 0 FLAG 640 864 0 FLAG -336 -272 0 FLAG -336 -400 V+ SYMBOL njf 192 64 M90 WINDOW 0 -37 23 VRight 2 WINDOW 3 -9 -3 VRight 2 SYMATTR InstName J1 SYMATTR Value J113 SYMBOL voltage -416 -400 R0 WINDOW 123 0 0 Left 0 WINDOW 39 10 135 Left 2 WINDOW 0 10 0 Left 2 WINDOW 3 15 104 Left 2 SYMATTR InstName V2 SYMATTR Value 36 SYMBOL schottky 1184 -224 R180 WINDOW 3 24 0 Left 2 WINDOW 0 24 64 Left 2 SYMATTR Value BAS40HY SYMATTR InstName D2 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 176 176 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 22 SYMBOL res 176 -48 M0 WINDOW 0 38 42 Left 2 WINDOW 3 36 66 Left 2 SYMATTR InstName R2 SYMATTR Value 100k SYMBOL res 272 -144 R180 WINDOW 0 40 70 Left 2 WINDOW 3 45 42 Left 2 SYMATTR InstName R1 SYMATTR Value 100k SYMBOL res 320 -560 R270 WINDOW 0 33 55 VTop 2 WINDOW 3 -3 55 VBottom 2 SYMATTR InstName R4 SYMATTR Value 100k SYMBOL res 1184 -304 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R6 SYMATTR Value 100k SYMBOL cap 400 -688 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value 10000n SYMATTR SpiceLine V=6.3 Irms=0 Rser=0 Lser=0 mfg="Murata" pn="GRM185R60J106ME15" type="X5R" SYMBOL res 1072 -112 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R9 SYMATTR Value 15k SYMBOL res 848 112 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R12 SYMATTR Value 8.2K SYMBOL cap 1040 -208 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value 10n SYMATTR SpiceLine V=16 Irms=647m Rser=0.0322889 Lser=0 mfg="KEMET" pn="C0201C103K4PAC" type="X5R" SYMBOL cap 736 112 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value 22n SYMATTR SpiceLine V=4 Irms=356m Rser=0.150334 Lser=0 mfg="KEMET" pn="C0402C223K7PAC" type="X5R" SYMBOL res 544 -16 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R13 SYMATTR Value 10k SYMBOL cap 512 -112 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 22p SYMATTR SpiceLine V=16 Irms=0 Rser=0.3482 Lser=551p mfg="Würth Elektronik" pn="885012006019 WCAP-CSGP 0603" type="NP0" SYMBOL res 432 272 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R14 SYMATTR Value 1371 SYMBOL res 704 -688 R0 SYMATTR InstName R17 SYMATTR Value 100k SYMBOL res 2528 272 R90 WINDOW 0 -4 57 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R7 SYMATTR Value 600 SYMBOL res 2800 448 R180 WINDOW 0 47 75 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R8 SYMATTR Value 600 SYMBOL res -208 -384 M180 WINDOW 0 40 70 Left 2 WINDOW 3 37 41 Left 2 SYMATTR InstName R5 SYMATTR Value 100k SYMBOL res -208 -48 M180 WINDOW 0 40 70 Left 2 WINDOW 3 38 43 Left 2 SYMATTR InstName R10 SYMATTR Value 100k SYMBOL cap -240 -64 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C1 SYMATTR Value 10n SYMATTR SpiceLine V=50 Irms=291m Rser=0.34258 Lser=0 mfg="KEMET" pn="C0805F103K5RAC" type="X7R" SYMBOL cap 2624 272 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value 10000n SYMATTR SpiceLine V=25 Irms=0 Rser=0 Lser=0 mfg="Murata" pn="GRM188R61E106MA73" type="X5R" SYMBOL res 1024 -16 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R11 SYMATTR Value 150k SYMBOL res 288 272 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R15 SYMATTR Value 8.2k SYMBOL res 1136 -16 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R16 SYMATTR Value 47k SYMBOL OpAmps\\LT1058 -80 -304 R0 SYMATTR InstName U5 SYMBOL OpAmps\\LT1058 384 -496 M0 SYMATTR InstName U6 SYMBOL OpAmps\\LT1058 880 -784 M0 WINDOW 0 -79 26 Left 2 WINDOW 3 -120 114 Left 2 SYMATTR InstName U1 SYMBOL res 1040 -832 R0 SYMATTR InstName R19 SYMATTR Value 120k SYMBOL res 1040 -672 R0 SYMATTR InstName R20 SYMATTR Value 100k SYMBOL cap 1152 -576 M180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C7 SYMATTR Value 10n SYMATTR SpiceLine V=50 Irms=291m Rser=0.34258 Lser=0 mfg="KEMET" pn="C0805F103K5RAC" type="X7R" SYMBOL OpAmps\\LT1115 464 64 R0 SYMATTR InstName U4 SYMBOL OpAmps\\LT1115 960 80 R0 SYMATTR InstName U3 SYMBOL schottky 592 -224 R180 WINDOW 3 24 0 Left 2 WINDOW 0 24 64 Left 2 SYMATTR Value BAS40HY SYMATTR InstName D1 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 592 -304 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R18 SYMATTR Value 100k SYMBOL schottky 656 528 M0 SYMATTR Value BAS40HY SYMATTR InstName D5 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 624 704 R0 SYMATTR InstName R21 SYMATTR Value 820k SYMBOL schottky 480 528 M0 SYMATTR Value BAS40HY SYMATTR InstName D6 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 448 704 R0 WINDOW 0 39 28 Left 2 WINDOW 3 41 58 Left 2 SYMATTR InstName R22 SYMATTR Value 820k SYMBOL res 1152 464 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R23 SYMATTR Value 100k SYMBOL OpAmps\\LT1058 944 592 R0 SYMATTR InstName U2 SYMBOL res 1040 640 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R24 SYMATTR Value 820k SYMBOL cap 608 736 M0 WINDOW 0 27 51 Left 2 WINDOW 3 21 77 Left 2 SYMATTR InstName C9 SYMATTR Value 1000n SYMBOL cap 432 736 M0 SYMATTR InstName C10 SYMATTR Value 1000n SYMBOL cap 1184 768 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C8 SYMATTR Value 1000n SYMBOL res 656 496 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R25 SYMATTR Value 10k SYMBOL res 480 496 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R26 SYMATTR Value 10k SYMBOL res 1280 -128 M0 SYMATTR InstName R27 SYMATTR Value 1.5k SYMBOL cap 1440 -288 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C12 SYMATTR Value 100n SYMBOL schottky 1680 -208 R180 WINDOW 3 24 0 Left 2 WINDOW 0 24 64 Left 2 SYMATTR Value BAS40HY SYMATTR InstName D3 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 1680 -288 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R36 SYMATTR Value 100k SYMBOL res 1472 -384 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R29 SYMATTR Value 100k SYMBOL schottky 1360 528 M0 SYMATTR Value BAS40HY SYMATTR InstName D8 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 1328 704 R0 SYMATTR InstName R31 SYMATTR Value 820k SYMBOL res 1744 464 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R32 SYMATTR Value 100k SYMBOL OpAmps\\LT1058 1536 592 R0 SYMATTR InstName U8 SYMBOL res 1632 640 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R33 SYMATTR Value 820k SYMBOL cap 1312 736 M0 SYMATTR InstName C15 SYMATTR Value 1000n SYMBOL cap 1776 768 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C17 SYMATTR Value 1000n SYMBOL res 1360 496 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R35 SYMATTR Value 10k SYMBOL cap 2032 -288 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C18 SYMATTR Value 100n SYMBOL schottky 2272 -208 R180 WINDOW 3 24 0 Left 2 WINDOW 0 24 64 Left 2 SYMATTR Value BAS40HY SYMATTR InstName D4 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 2272 -288 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R38 SYMATTR Value 100k SYMBOL res 2064 -384 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R39 SYMATTR Value 100k SYMBOL schottky 1952 528 M0 SYMATTR Value BAS40HY SYMATTR InstName D10 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 1920 704 R0 SYMATTR InstName R41 SYMATTR Value 820k SYMBOL res 2336 464 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R42 SYMATTR Value 100k SYMBOL OpAmps\\LT1058 2128 592 R0 SYMATTR InstName U10 SYMBOL res 2224 640 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R43 SYMATTR Value 820k SYMBOL cap 1904 736 M0 SYMATTR InstName C21 SYMATTR Value 1000n SYMBOL cap 2368 768 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C23 SYMATTR Value 1000n SYMBOL res 1952 496 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R45 SYMATTR Value 10k SYMBOL res 1872 -128 M0 SYMATTR InstName R46 SYMATTR Value 1.5k SYMBOL OpAmps\\LT1058 1408 -192 R0 SYMATTR InstName U7 SYMBOL OpAmps\\LT1058 2000 -192 R0 SYMATTR InstName U9 SYMBOL cap 912 528 R90 WINDOW 0 8 66 VBottom 2 WINDOW 3 -18 -26 VTop 2 SYMATTR InstName C11 SYMATTR Value 10000n SYMATTR SpiceLine V=25 Irms=0 Rser=0 Lser=0 mfg="Murata" pn="GRM188R61E106MA73" type="X5R" SYMBOL cap 1504 528 R90 WINDOW 0 6 70 VBottom 2 WINDOW 3 -22 -25 VTop 2 SYMATTR InstName C13 SYMATTR Value 10000n SYMATTR SpiceLine V=25 Irms=0 Rser=0 Lser=0 mfg="Murata" pn="GRM188R61E106MA73" type="X5R" SYMBOL cap 2096 528 R90 WINDOW 0 8 70 VBottom 2 WINDOW 3 -19 -25 VTop 2 SYMATTR InstName C14 SYMATTR Value 10000n SYMATTR SpiceLine V=25 Irms=0 Rser=0 Lser=0 mfg="Murata" pn="GRM188R61E106MA73" type="X5R" SYMBOL cap -352 -304 M180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C16 SYMATTR Value 10000n SYMATTR SpiceLine V=25 Irms=0 Rser=0 Lser=0 mfg="Murata" pn="GRM188R61E106MA73" type="X5R" SYMBOL res 704 384 R0 SYMATTR InstName R28 SYMATTR Value 560k TEXT -496 136 Left 2 !.tran 0 20 0 1u uic TEXT -496 88 Left 2 !.options plotwinsize=0 numdgt=7 method=trap TEXT -424 -648 Left 2 ;1kHz low distortion sinewave oscillator. TEXT -424 -616 Left 2 ;Approaching 130dB. Edward Rawde 30 Jan 2025.