* SPICE netlist
D1 0 N002 1N4148
C1 N001 N002 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
V1 N001 0 SINE(0 6 5000) AC 0 Rser=50
D2 N002 N003 1N4148
D3 N003 N004 1N4148
D4 N004 N005 1N4148
D6 N006 N007 1N4148
D5 N005 N006 1N4148
D7 N008 N009 1N4148
D8 N007 N008 1N4148
D9 N010 N011 1N4148
D10 N009 N010 1N4148
D11 N012 N013 1N4148
D12 N011 N012 1N4148
C2 N001 N004 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
C3 N001 N006 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
C4 N001 N008 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
C5 N001 N010 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
C6 N001 N012 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
C7 N013 0 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
C8 N011 0 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
C9 N009 0 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
C10 N007 0 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
C11 N003 0 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
C12 N005 0 {CC} V=X Rser=1m Lser=0 mfg=" ---" pn=" ---" type=" ---"
.tran 0 2 0 1m
.param CC=1u

* LTspice schematic (.asc)
Version 4
SHEET 1 1440 320
WIRE -448 -160 -640 -160
WIRE -240 -160 -448 -160
WIRE -240 -96 -240 -160
WIRE -32 -96 -240 -96
WIRE 176 -96 -32 -96
WIRE 384 -96 176 -96
WIRE 592 -96 384 -96
WIRE -448 -80 -448 -160
WIRE -528 16 -592 16
WIRE -448 16 -448 -16
WIRE -448 16 -464 16
WIRE -416 16 -448 16
WIRE -336 16 -352 16
WIRE -320 16 -336 16
WIRE -240 16 -240 -32
WIRE -240 16 -256 16
WIRE -224 16 -240 16
WIRE -144 16 -160 16
WIRE -112 16 -144 16
WIRE -32 16 -32 -32
WIRE -32 16 -48 16
WIRE -16 16 -32 16
WIRE 96 16 48 16
WIRE 176 16 176 -32
WIRE 176 16 160 16
WIRE 192 16 176 16
WIRE 304 16 256 16
WIRE 384 16 384 -32
WIRE 384 16 368 16
WIRE 400 16 384 16
WIRE 512 16 464 16
WIRE 592 16 592 -32
WIRE 592 16 576 16
WIRE 608 16 592 16
WIRE 720 16 672 16
WIRE -336 32 -336 16
WIRE -144 48 -144 16
WIRE 96 48 96 16
WIRE 96 48 64 48
WIRE 304 48 304 16
WIRE 304 48 272 48
WIRE 512 48 512 16
WIRE 512 48 480 48
WIRE 720 48 720 16
WIRE 720 48 688 48
WIRE -720 112 -720 -160
WIRE -592 112 -592 16
WIRE -592 112 -720 112
WIRE -336 112 -336 96
WIRE -336 112 -592 112
WIRE -144 112 -336 112
WIRE 64 112 -144 112
WIRE 272 112 64 112
WIRE 480 112 272 112
WIRE 688 112 480 112
WIRE -592 160 -592 112
FLAG -592 160 0
SYMBOL diode -528 32 R270
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL cap -464 -80 R0
SYMATTR InstName C1
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"
SYMBOL Voltage -624 -160 R90
SYMATTR InstName V1
SYMATTR Value SINE(0 6 5000)
SYMATTR Value2 AC 0
SYMATTR SpiceLine Rser=50
SYMBOL diode -416 32 R270
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL diode -320 32 R270
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL diode -224 32 R270
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL diode -16 32 R270
SYMATTR InstName D6
SYMATTR Value 1N4148
SYMBOL diode -112 32 R270
SYMATTR InstName D5
SYMATTR Value 1N4148
SYMBOL diode 192 32 R270
SYMATTR InstName D7
SYMATTR Value 1N4148
SYMBOL diode 96 32 R270
SYMATTR InstName D8
SYMATTR Value 1N4148
SYMBOL diode 400 32 R270
SYMATTR InstName D9
SYMATTR Value 1N4148
SYMBOL diode 304 32 R270
SYMATTR InstName D10
SYMATTR Value 1N4148
SYMBOL diode 608 32 R270
SYMATTR InstName D11
SYMATTR Value 1N4148
SYMBOL diode 512 32 R270
SYMATTR InstName D12
SYMATTR Value 1N4148
SYMBOL cap -256 -96 R0
SYMATTR InstName C2
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"
SYMBOL cap -48 -96 R0
SYMATTR InstName C3
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"
SYMBOL cap 160 -96 R0
SYMATTR InstName C4
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"
SYMBOL cap 368 -96 R0
SYMATTR InstName C5
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"
SYMBOL cap 576 -96 R0
SYMATTR InstName C6
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"
SYMBOL cap 672 48 R0
SYMATTR InstName C7
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"
SYMBOL cap 464 48 R0
SYMATTR InstName C8
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"
SYMBOL cap 256 48 R0
SYMATTR InstName C9
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"
SYMBOL cap 48 48 R0
SYMATTR InstName C10
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"
SYMBOL cap -352 32 R0
SYMATTR InstName C11
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"
SYMBOL cap -160 48 R0
SYMATTR InstName C12
SYMATTR Value {CC}
SYMATTR SpiceLine V=X Rser=1m Lser=0 mfg="   ---" pn="   ---" type="   ---"