Version 4 SHEET 1 1072 912 WIRE -1808 -1632 -1856 -1632 WIRE -1728 -1632 -1744 -1632 WIRE -1616 -1632 -1648 -1632 WIRE -1600 -1632 -1616 -1632 WIRE -1504 -1632 -1520 -1632 WIRE -1312 -1632 -1376 -1632 WIRE -1168 -1632 -1232 -1632 WIRE -2304 -1536 -2368 -1536 WIRE -2160 -1536 -2304 -1536 WIRE -1376 -1536 -1376 -1632 WIRE -1248 -1536 -1376 -1536 WIRE -1168 -1536 -1168 -1632 WIRE -1168 -1536 -1184 -1536 WIRE -864 -1536 -912 -1536 WIRE -672 -1536 -784 -1536 WIRE -544 -1536 -672 -1536 WIRE -448 -1536 -544 -1536 WIRE -320 -1536 -448 -1536 WIRE -2304 -1504 -2304 -1536 WIRE -672 -1488 -672 -1536 WIRE -2032 -1456 -2064 -1456 WIRE -2368 -1440 -2368 -1536 WIRE -544 -1440 -544 -1536 WIRE -1616 -1408 -1616 -1632 WIRE -1584 -1408 -1616 -1408 WIRE -2304 -1392 -2304 -1424 WIRE -2224 -1392 -2304 -1392 WIRE -2160 -1392 -2224 -1392 WIRE -1504 -1392 -1504 -1632 WIRE -1504 -1392 -1520 -1392 WIRE -1488 -1392 -1504 -1392 WIRE -1376 -1392 -1376 -1536 WIRE -1376 -1392 -1408 -1392 WIRE -1280 -1392 -1376 -1392 WIRE -912 -1392 -912 -1536 WIRE -2032 -1376 -2032 -1456 WIRE -1808 -1376 -2032 -1376 WIRE -1712 -1376 -1744 -1376 WIRE -1680 -1376 -1712 -1376 WIRE -1584 -1376 -1600 -1376 WIRE -1168 -1376 -1168 -1536 WIRE -1168 -1376 -1216 -1376 WIRE -1136 -1376 -1168 -1376 WIRE -1024 -1376 -1072 -1376 WIRE -960 -1376 -1024 -1376 WIRE -672 -1376 -672 -1424 WIRE -672 -1376 -784 -1376 WIRE -448 -1376 -448 -1536 WIRE -2304 -1360 -2304 -1392 WIRE -1024 -1360 -1024 -1376 WIRE -2224 -1344 -2224 -1392 WIRE -2032 -1344 -2032 -1376 WIRE -1712 -1344 -1712 -1376 WIRE -672 -1344 -672 -1376 WIRE -1376 -1312 -1376 -1392 WIRE -784 -1312 -784 -1376 WIRE -2368 -1264 -2368 -1360 WIRE -2304 -1264 -2304 -1280 WIRE -2224 -1264 -2224 -1280 WIRE -1552 -1264 -1552 -1360 WIRE -1248 -1248 -1248 -1344 WIRE -1024 -1248 -1024 -1280 WIRE -960 -1248 -960 -1328 WIRE -912 -1248 -912 -1312 WIRE -544 -1248 -544 -1376 WIRE -2032 -1232 -2032 -1264 WIRE -672 -1216 -672 -1264 WIRE -1376 -1184 -1376 -1248 WIRE -784 -1184 -784 -1248 WIRE -784 -1184 -1376 -1184 WIRE -448 -1184 -448 -1296 WIRE -448 -1184 -784 -1184 FLAG -320 -1536 ac_out IOPIN -320 -1536 Out FLAG -1248 -1248 0 FLAG -2368 -1264 0 FLAG -912 -1248 0 FLAG -960 -1248 0 FLAG -672 -1216 0 FLAG -2160 -1536 VCC IOPIN -2160 -1536 BiDir FLAG -1248 -1408 VCC IOPIN -1248 -1408 BiDir FLAG -544 -1248 0 FLAG -1552 -1264 0 FLAG -1552 -1424 VCC IOPIN -1552 -1424 BiDir FLAG -2160 -1392 ref IOPIN -2160 -1392 BiDir FLAG -1280 -1360 ref IOPIN -1280 -1360 BiDir FLAG -1712 -1264 ref IOPIN -1712 -1264 BiDir FLAG -1856 -1632 0 FLAG -2064 -1456 audio_in IOPIN -2064 -1456 In FLAG -1024 -1248 0 FLAG -2032 -1232 0 FLAG -2304 -1264 0 FLAG -2224 -1264 0 SYMBOL voltage -2032 -1360 R0 WINDOW 0 64 24 Right 2 WINDOW 3 171 106 Right 2 WINDOW 123 92 69 Right 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value SINE(0 .6 1k) SYMATTR Value2 AC 1 SYMBOL res -1504 -1408 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 4k7 SYMBOL cap -1248 -1552 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 10n SYMBOL UniversalOpamp2 -1248 -1376 R0 SYMATTR InstName U1 SYMATTR Value2 Avol=1Meg GBW={GBW} Slew=1000Meg SYMBOL voltage -2368 -1456 R0 WINDOW 0 -43 59 Right 2 WINDOW 3 37 93 Right 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value 12 SYMBOL e -912 -1408 R0 WINDOW 0 12 4 Left 2 WINDOW 3 -43 141 Left 2 SYMATTR InstName E1 SYMATTR Value {PlantGain} SYMBOL ind -880 -1520 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 10µ SYMATTR SpiceLine Rser=20m SYMBOL cap -688 -1488 R0 SYMATTR InstName C4 SYMATTR Value 680n SYMBOL res -464 -1392 R0 SYMATTR InstName R1 SYMATTR Value 10k SYMBOL res -688 -1360 R0 SYMATTR InstName R2 SYMATTR Value 2R2 SYMBOL cap -560 -1440 R0 SYMATTR InstName C2 SYMATTR Value 680n SYMBOL UniversalOpamp2 -1552 -1392 R0 SYMATTR InstName U2 SYMATTR Value2 Avol=1Meg GBW={GBW} Slew=1000Meg SYMBOL res -1616 -1648 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 10k SYMBOL res -1744 -1648 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 2k2 SYMBOL cap -1808 -1648 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value 10µ SYMBOL res -1696 -1248 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R5 SYMATTR Value 100k SYMBOL res -1584 -1392 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R7 SYMATTR Value 1k0 SYMBOL cap -1744 -1392 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 220n SYMBOL res -1040 -1376 R0 SYMATTR InstName R8 SYMATTR Value 50k SYMBOL cap -1072 -1392 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value 470n SYMBOL cap -1360 -1248 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C7 SYMATTR Value 2µ2 SYMBOL res -2320 -1520 R0 SYMATTR InstName R9 SYMATTR Value 10k SYMBOL res -2320 -1376 R0 SYMATTR InstName R10 SYMATTR Value 10k SYMBOL cap -2240 -1344 R0 SYMATTR InstName C8 SYMATTR Value 1µ0 SYMBOL res -1328 -1616 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R11 SYMATTR Value 100k SYMBOL cap -800 -1312 R0 SYMATTR InstName C9 SYMATTR Value 3n3 TEXT -408 -1224 Left 2 !.ac dec 100 10 100k TEXT -928 -1600 Left 2 ;Class-D Amplifier TEXT -408 -1248 Left 2 !.param PlantGain 10 TEXT -1928 -1120 Left 3 ;Class-D Amp with SE-Postfilter-Feedback Compensator Type I: Gain Bode Plot TEXT -408 -1272 Left 2 !.param GBW 10Meg TEXT -408 -1192 Left 2 !;tran 20m