Version 4 SHEET 1 880 1076 WIRE -128 -32 -208 -32 WIRE 128 -32 0 -32 WIRE 224 -32 128 -32 WIRE 320 -32 224 -32 WIRE 592 -32 320 -32 WIRE -208 16 -208 -32 WIRE 592 16 592 -32 WIRE 0 48 0 -32 WIRE 128 48 128 -32 WIRE 320 48 320 -32 WIRE -128 144 -128 -32 WIRE -112 144 -128 144 WIRE 0 144 0 112 WIRE 0 144 -112 144 WIRE -208 176 -208 96 WIRE 320 176 320 112 WIRE 320 176 -208 176 WIRE 464 176 320 176 WIRE 592 176 592 96 WIRE 592 176 464 176 WIRE -32 208 -128 208 WIRE 128 208 128 112 WIRE 128 208 -32 208 WIRE 464 224 464 176 WIRE 592 240 592 176 WIRE -208 256 -208 176 WIRE 0 256 0 144 WIRE 128 256 128 208 WIRE 320 256 320 176 WIRE -208 384 -208 336 WIRE -128 384 -128 208 WIRE -128 384 -208 384 WIRE 0 384 0 320 WIRE 128 384 128 320 WIRE 128 384 0 384 WIRE 320 384 320 320 WIRE 320 384 128 384 WIRE 592 384 592 320 WIRE 592 384 320 384 WIRE -112 464 -112 144 WIRE -32 464 -32 208 WIRE 224 544 224 -32 WIRE -112 656 -112 528 WIRE -32 656 -32 528 WIRE -32 656 -112 656 WIRE -32 704 -32 656 WIRE -112 720 -112 656 WIRE 224 752 224 624 WIRE -112 832 -112 784 WIRE -32 832 -32 784 WIRE -32 832 -112 832 WIRE 176 832 -32 832 WIRE -112 912 -112 832 WIRE -32 912 -32 832 WIRE -112 1040 -112 976 WIRE -80 1040 -112 1040 WIRE -32 1040 -32 976 WIRE -32 1040 -80 1040 WIRE 224 1040 224 848 WIRE 224 1040 -32 1040 WIRE -80 1056 -80 1040 FLAG 464 224 0 FLAG -80 1056 0 SYMBOL schottky 16 112 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value 1N5819 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 144 112 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value 1N5819 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 16 320 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D3 SYMATTR Value 1N5819 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 144 320 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D4 SYMATTR Value 1N5819 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 304 48 R0 SYMATTR InstName C1 SYMATTR Value 820µ SYMBOL cap 304 256 R0 SYMATTR InstName C2 SYMATTR Value 820µ SYMBOL voltage -208 240 R0 WINDOW 3 -250 53 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value SINE(0 25V 50Hz) SYMBOL voltage -208 0 R0 WINDOW 3 -246 52 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value SINE(0 25V 50Hz) SYMBOL schottky -96 528 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D5 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky -16 528 R180 WINDOW 0 24 64 Left 2 WINDOW 3 -84 -1 Left 2 SYMATTR InstName D6 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap -128 720 R0 SYMATTR InstName C3 SYMATTR Value 1µ SYMBOL res -48 688 R0 SYMATTR InstName R1 SYMATTR Value 4.7Mega SYMBOL res 576 0 R0 SYMATTR InstName R2 SYMATTR Value 50 SYMBOL res 576 224 R0 SYMATTR InstName R3 SYMATTR Value 50 SYMBOL zener -96 976 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D7 SYMATTR Value BZX84C12L SYMATTR Description Diode SYMATTR Type diode SYMBOL cap -48 912 R0 SYMATTR InstName C4 SYMATTR Value 4.7n SYMBOL nmos 176 752 R0 SYMATTR InstName M1 SYMATTR Value Si7336ADP SYMBOL res 208 528 R0 SYMATTR InstName R4 SYMATTR Value 25 TEXT -408 464 Left 2 !.tran 0.1