Version 4
SHEET 1 880 680
WIRE 208 112 0 112
WIRE 352 112 288 112
WIRE 400 112 352 112
WIRE 544 112 480 112
WIRE 720 112 544 112
WIRE 0 128 0 112
WIRE 352 128 352 112
WIRE 544 128 544 112
WIRE 720 128 720 112
WIRE 0 224 0 208
WIRE 352 224 352 192
WIRE 352 224 0 224
WIRE 544 224 544 192
WIRE 544 224 352 224
WIRE 720 224 720 208
WIRE 720 224 544 224
WIRE 352 272 352 224
FLAG 352 272 0
SYMBOL res 304 96 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL res 496 96 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 736 224 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R4
SYMATTR Value 1015k
SYMBOL cap 336 128 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap 528 128 R0
SYMATTR InstName C2
SYMATTR Value 100n
SYMBOL voltage 0 112 R0
WINDOW 123 24 132 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value2 AC 1V
SYMATTR InstName V2
SYMATTR Value 0
TEXT -34 296 Left 0 !.ac dec 10 1 100