Version 4
SHEET 1 1068 680
WIRE -128 -304 -720 -304
WIRE 144 -304 -128 -304
WIRE 304 -304 144 -304
WIRE 624 -304 304 -304
WIRE 752 -304 624 -304
WIRE 624 -272 624 -304
WIRE 144 -256 144 -304
WIRE -720 -240 -720 -304
WIRE -688 -240 -720 -240
WIRE -576 -240 -608 -240
WIRE -272 -240 -576 -240
WIRE 16 -240 -272 -240
WIRE -128 -176 -128 -304
WIRE 624 -112 624 -192
WIRE -128 -64 -128 -96
WIRE 144 -64 144 -176
WIRE 560 -64 144 -64
WIRE -272 0 -272 -240
WIRE 16 0 16 -240
WIRE 752 48 752 -304
WIRE 624 96 624 -16
WIRE 688 96 624 96
WIRE 144 112 144 -64
WIRE 304 112 304 -304
WIRE -272 160 -272 80
WIRE -208 160 -272 160
WIRE -96 160 -144 160
WIRE 16 160 16 80
WIRE 16 160 -96 160
WIRE 80 160 16 160
WIRE 400 160 368 160
WIRE 432 160 400 160
WIRE 592 160 512 160
WIRE 752 160 752 144
WIRE 752 160 592 160
WIRE 832 160 752 160
WIRE 944 160 896 160
WIRE -720 176 -720 -240
WIRE -272 176 -272 160
WIRE -96 192 -96 160
WIRE 400 192 400 160
WIRE 16 208 16 160
WIRE 224 208 144 208
WIRE 304 208 224 208
WIRE 944 224 944 160
WIRE -416 240 -464 240
WIRE -336 240 -352 240
WIRE -320 240 -336 240
WIRE -336 272 -336 240
WIRE -128 272 -128 -64
WIRE -96 272 -96 256
WIRE -96 272 -128 272
WIRE -464 288 -464 240
WIRE 400 288 400 272
WIRE 432 288 400 288
WIRE 512 288 496 288
WIRE 592 288 592 160
WIRE 592 288 576 288
WIRE -576 304 -576 -240
WIRE 400 304 400 288
WIRE 624 320 624 96
WIRE 752 320 752 160
WIRE 944 320 944 304
WIRE -96 336 -96 272
WIRE 224 336 224 208
WIRE 400 336 400 304
WIRE 944 336 944 320
WIRE -720 464 -720 256
WIRE -576 464 -576 368
WIRE -576 464 -720 464
WIRE -464 464 -464 368
WIRE -464 464 -576 464
WIRE -336 464 -336 352
WIRE -336 464 -464 464
WIRE -272 464 -272 272
WIRE -272 464 -336 464
WIRE -96 464 -96 400
WIRE -96 464 -272 464
WIRE 16 464 16 288
WIRE 16 464 -96 464
WIRE 224 464 224 416
WIRE 224 464 16 464
WIRE 400 464 400 400
WIRE 400 464 224 464
WIRE 624 464 624 400
WIRE 624 464 400 464
WIRE 752 464 752 400
WIRE 752 464 624 464
WIRE 944 464 944 416
WIRE 944 464 752 464
WIRE -720 480 -720 464
FLAG -720 480 0
FLAG -272 160 Vmicout
FLAG -464 240 Vmic
FLAG 944 160 Vout
FLAG 144 -64 Vc1
FLAG -128 -64 Vmute
FLAG 400 304 Vfboff
FLAG 752 160 Voutdc
FLAG 944 320 Vout2
SYMBOL npn 80 112 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL polcap -208 176 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C1
SYMATTR Value 4.7u
SYMBOL res 208 320 R0
SYMATTR InstName R2
SYMATTR Value 68
SYMBOL npn 368 112 M0
SYMATTR InstName Q2
SYMATTR Value 2N3904
SYMBOL res 0 192 R0
SYMATTR InstName R3
SYMATTR Value 22k
SYMBOL res 0 -16 R0
SYMATTR InstName R4
SYMATTR Value 39k
SYMBOL njf -320 176 R0
SYMATTR InstName J1
SYMATTR Value 2N4338
SYMBOL cap -352 224 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 20p
SYMBOL Misc\\signal -464 272 R0
WINDOW 123 24 132 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 24 44 Left 2
SYMATTR Value2 AC 2mv 0
SYMATTR InstName V2
SYMATTR Value SINE(0 2m 1k)
SYMBOL res -288 -16 R0
SYMATTR InstName R5
SYMATTR Value 2.2k
SYMBOL Misc\\battery -720 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 2.2
SYMBOL res 128 -272 R0
SYMATTR InstName R1
SYMATTR Value 680
SYMBOL res 608 304 R0
SYMATTR InstName R6
SYMATTR Value 22k
SYMBOL res 384 176 R0
SYMATTR InstName R8
SYMATTR Value 47
SYMBOL polcap 384 336 R0
SYMATTR InstName C3
SYMATTR Value 100u
SYMBOL res 528 144 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 4.7k
SYMBOL npn 688 48 R0
SYMATTR InstName Q4
SYMATTR Value 2N3904
SYMBOL res 736 304 R0
SYMATTR InstName R10
SYMATTR Value 680
SYMBOL pnp 560 -16 M180
SYMATTR InstName Q3
SYMATTR Value 2N3906
SYMBOL res 608 -288 R0
SYMATTR InstName R7
SYMATTR Value 22
SYMBOL polcap 832 176 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C4
SYMATTR Value 10u
SYMBOL res 928 208 R0
SYMATTR InstName R11
SYMATTR Value 5k
SYMBOL res -352 256 R0
SYMATTR InstName R12
SYMATTR Value 500meg
SYMBOL polcap -112 336 R0
SYMATTR InstName C5
SYMATTR Value 33u
SYMBOL schottky -112 192 R0
SYMATTR InstName D1
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res -144 -192 R0
SYMATTR InstName R13
SYMATTR Value 220k
SYMBOL diode 496 272 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL schottky 576 272 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D3
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res -592 -256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R15
SYMATTR Value 100
SYMBOL polcap -592 304 R0
SYMATTR InstName C7
SYMATTR Value 100u
SYMBOL res 928 320 R0
SYMATTR InstName R14
SYMATTR Value 5k
TEXT -552 488 Left 2 !.tran 1.5 startup
TEXT 152 -88 Left 2 ;1.6V
TEXT -64 144 Left 2 ;0.8V
TEXT 680 144 Left 2 ;0.8V
TEXT 632 112 Left 2 ;1.47V
TEXT 160 224 Left 2 ;0.1V
TEXT -504 104 Left 2 ;ECM
TEXT 464 344 Left 2 ;Feed Back\nStartup
TEXT -712 136 Left 2 ;Low Battery
TEXT 568 488 Left 2 !.wave micamp3.wav 16 48k V(Vout2)
LINE Normal -512 448 -512 128 2
LINE Normal -240 448 -512 448 2
LINE Normal -240 128 -240 448 2
LINE Normal -512 128 -240 128 2