Version 4
SHEET 1 2552 804
WIRE -496 -320 -496 -416
WIRE -352 -304 -352 -416
WIRE -272 -304 -352 -304
WIRE 112 -304 112 -416
WIRE 112 -304 16 -304
WIRE -352 -240 -352 -304
WIRE -272 -240 -352 -240
WIRE 112 -240 112 -304
WIRE 112 -240 16 -240
WIRE -352 -224 -352 -240
WIRE 112 -224 112 -240
WIRE -496 -144 -496 -240
WIRE -352 -144 -352 -160
WIRE -128 -144 -128 -208
WIRE 112 -144 112 -160
FLAG -496 -144 0
FLAG -496 -416 +V
FLAG -352 -416 +V
FLAG -128 -144 0
FLAG 112 -416 Vref
FLAG -352 -144 0
FLAG 112 -144 0
SYMBOL voltage -496 -336 R0
SYMATTR Value2 AC 1
SYMATTR SpiceLine Rser=0
SYMATTR InstName V2
SYMATTR Value SINE(3.3 1m 1000k)
SYMBOL References\\LTC6655-1.25 -128 -272 R0
SYMATTR InstName U1
SYMBOL cap -368 -224 R0
SYMATTR InstName C5
SYMATTR Value 1µ
SYMBOL cap 96 -224 R0
SYMATTR InstName C6
SYMATTR Value {CX}
SYMATTR SpiceLine V=20 Irms=600m Rser=40m
TEXT -608 -144 VLeft 3 ;Microphone\n(Knowles FG-23629)
TEXT -496 -88 Left 2 !.noise V(Vref) V2 oct 20 1k 16000k
TEXT -496 -56 Left 2 !;tran 0 10m 0m 20n startup uic
TEXT -56 -88 Left 2 !.option plotwinsize=0
TEXT -56 -56 Left 2 !.step param CX 2.7u 47.7u 15u