1. ASIC PMm2
08/02/2008

2. BLOC DIAGRAM OF PMm2 ASIC
08/02/2008
Selma CONFORTI.

3. Selma CONFORTI. conforti@lal.in2p3.fr
PREAMPLIFIER Vi
Input signal
Variable Cin
2.5p;5p;10p
ADJUSTABLE
VALUES
FOR ALL INPUTS
10ns
Number of pe:1/3pe to 300 pe
1 pe = 160 fC
1/3 pe = 53 fC
300 pe = 48pC
Q= i dt, if dt=10ns then i:5uA to 5mA
If Ri=50 ohm then Vi= 250uV to 250mV
Variable Cf
1pF;0.5p;
0.25p;0.125p;…. 7fF
ADJUSTABLE
VALUES
FOR EVERY INPUTS
08/02/2008
Selma CONFORTI.

4. Preamplifier output waveforms
Cf. from 1p to 2p
Gain from 1 to 2.5
Vin=20mV
Cin set (2.5p)
08/02/2008
Selma CONFORTI.

5. Selma CONFORTI. conforti@lal.in2p3.fr
Creal
Cobt 1
1,023
1,5
1,53
1,75
1,78
1,875
1,9
1,937
1,973
1,968 2
1,9836
2,019
1,9914
2,031
08/02/2008
Selma CONFORTI.

6. Selma CONFORTI. conforti@lal.in2p3.fr
Vout
1/Vout CF
244,4 0, 1
163,5 0,
1,5
140,3 0,
1,75
131 0,
1,875
126,7 0,
1,937
124,7 0,
1,968
123,8 0,
1,9836
123,1 0,
1,9914
08/02/2008
Selma CONFORTI.

7. Selma CONFORTI. conforti@lal.in2p3.fr
Preamplifier output waveforms
Variable Cf
By steps of
7fF;15fF; 32fF;…
Vin=20mV
Cin set (2.5p)
Delta (Vout)/Vout
minimum
About 0.008
08/02/2008
Selma CONFORTI.

8. Preamplifier output waveforms
Variable Cin
2.5p;5p;10p
Vin=20mV
Cf set (1p)
08/02/2008
Selma CONFORTI.

9. Selma CONFORTI. conforti@lal.in2p3.fr
Output Linearity
Output waveforms
For differents
Vin
From 1mV to 250mV
INPUT RANGE
1/3pe-300pe
50fC-50pC
250uV-250mV
Good Output Linearity
G=5
Until 250mV (50pC)
300pe
08/02/2008
Selma CONFORTI.

10. Selma CONFORTI. conforti@lal.in2p3.fr
Output waveforms
For differents
Vin from 1mV to 250mV
2.5
Vout(V)
Output Linearity
G maximum=10
Until 160mV (32pC)
200pe
20pe
300pe
200pe
08/02/2008
Selma CONFORTI.

11. Selma CONFORTI. conforti@lal.in2p3.fr
Variable Cin
1.25p;2.5p;5p
08/02/2008
Selma CONFORTI.

12. Selma CONFORTI. conforti@lal.in2p3.fr
Cin=2.5p;Cf=1p
ADJUSTABLE W/L
08/02/2008
Selma CONFORTI.