Progetto di un capacimetro a microcontrollore per fotodiodi SPAD
Progetto di un capacimetro a microcontrollore per fotodiodi SPAD
Progetto di un capacimetro a microcontrollore per fotodiodi SPAD
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1<br />
2<br />
3<br />
4<br />
5<br />
+5V +5V<br />
R100<br />
+5V<br />
+5V<br />
0<br />
C15<br />
C16<br />
D2<br />
D ON LED<br />
R99<br />
R16<br />
D<br />
100n<br />
100n<br />
100<br />
R19<br />
0<br />
R17<br />
R18 D4<br />
8 4<br />
5k6 D3<br />
1k<br />
2k2<br />
R20 U3<br />
D1N4148<br />
R14<br />
D1N4148<br />
5k VCC RESET<br />
1k<br />
7<br />
C17<br />
R21<br />
DISCHARGE<br />
U4<br />
3<br />
3 V+ B<br />
OUTPUT<br />
B/S 6<br />
6<br />
-<br />
1n<br />
C21<br />
THRESHOLD<br />
100<br />
7<br />
2<br />
R22<br />
OUT<br />
TRIGGER<br />
1n<br />
5<br />
2<br />
1<br />
GND CONTROL<br />
+<br />
V- G<br />
100<br />
555C<br />
LM311 C24<br />
C22 1<br />
C23<br />
1n<br />
10n<br />
100n<br />
-5V<br />
L1<br />
C 1 2<br />
C<br />
R23<br />
+5V<br />
10uH<br />
560k<br />
V+1417<br />
C25 C26<br />
C27<br />
100n 10u<br />
100n<br />
8<br />
5<br />
4<br />
C28<br />
1<br />
Ain+<br />
nBUSY<br />
100n<br />
nREAD<br />
RD<br />
9<br />
sDATA<br />
R25<br />
Dout<br />
2<br />
sSCK<br />
33k<br />
C31<br />
Ain-<br />
2.2u<br />
B B<br />
12<br />
13<br />
CONVST<br />
BUSY 14<br />
SCLK 7<br />
J4<br />
U5<br />
R24<br />
1<br />
1k8<br />
SIGNAL IN<br />
3<br />
Vref<br />
4<br />
REFCOMP<br />
D7<br />
C30<br />
C29 C32<br />
8<br />
CLKOUT<br />
3.9V<br />
1n<br />
10u 100n<br />
LTC1417A<br />
R26<br />
1k<br />
EXTCLKIN 6<br />
16<br />
Vdd<br />
SHDN 11<br />
CAPITOLO 3. <strong>SPAD</strong>CAPMETER<br />
DGND<br />
Vss<br />
AGND<br />
10<br />
ANODE CATHODE<br />
Figura 3.27: Schema Orcad catena <strong>di</strong> acquisizione<br />
57<br />
2<br />
15<br />
5<br />
00<br />
A A<br />
Designed by Alessandro Ruggeri, Davide Tamborini<br />
Title<br />
<strong>SPAD</strong>CapMeter<br />
Size Document Number Rev<br />
A4<br />
03<br />
Date: Monday, July 13, 2009<br />
Sheet 2 of 2<br />
5<br />
4<br />
3<br />
2<br />
1
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