Version 4 SHEET 1 880 680 WIRE -320 -112 -1024 -112 WIRE 208 -112 -320 -112 WIRE -512 64 -640 64 WIRE -384 64 -448 64 WIRE 320 64 -384 64 WIRE 208 96 208 -112 WIRE -320 144 -320 -112 WIRE -384 160 -384 64 WIRE -352 160 -384 160 WIRE -128 176 -288 176 WIRE -16 176 -128 176 WIRE 160 176 -16 176 WIRE -816 192 -896 192 WIRE -752 192 -816 192 WIRE -640 192 -640 64 WIRE -640 192 -672 192 WIRE -608 192 -640 192 WIRE -464 192 -528 192 WIRE -352 192 -464 192 WIRE 320 192 320 64 WIRE 320 192 208 192 WIRE -1024 224 -1024 -112 WIRE -896 224 -896 192 WIRE -16 224 -16 176 WIRE -464 240 -464 192 WIRE 320 288 320 192 WIRE -1024 544 -1024 304 WIRE -896 544 -896 304 WIRE -464 544 -464 304 WIRE -320 544 -320 208 WIRE -16 544 -16 304 WIRE 320 544 320 368 FLAG -1024 544 0 FLAG 320 544 0 FLAG -320 544 0 FLAG -16 544 0 FLAG 320 192 LS FLAG -128 176 Gate FLAG -464 544 0 FLAG -896 544 0 FLAG -816 192 PWM SYMBOL res 304 272 R0 SYMATTR InstName Lautsprecher SYMATTR Value 8 SYMBOL voltage -1024 208 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 9 SYMBOL nmos 160 96 R0 SYMATTR InstName M1 SYMATTR Value IRF1405 SYMBOL Opamps\\LT1006A -320 112 R0 SYMATTR InstName U1 SYMBOL res -32 208 R0 SYMATTR InstName R4 SYMATTR Value 10k SYMBOL res -512 176 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 3,4k SYMBOL res -656 176 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 1,69k SYMBOL cap -480 240 R0 SYMATTR InstName C1 SYMATTR Value 22n SYMBOL cap -448 48 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value 22n SYMBOL voltage -896 208 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value PULSE(0 5 1m 1n 1n 1u 5u) TEXT -1056 568 Left 2 !.tran 20m