Next version of new shaper‐Next version of new shaper‐digitizer module g
Vladimir Zhulanov, Yury UsovVladimir Zhulanov, Yury Usov
BINP, Russia
2009.03.19
1
Update of barrel electronicsUpdate of barrel electronicsCurrent electronicsCurrent electronics
BelleQ – T – D
Sh ADCShaper-ADC
SuperBelleFADC pipelineFADC, pipeline
Shaper-DSP
SuperBelle
2
SuperBelleFADC, pipeline, DSP on shaper board
Shaper DSPShaper‐DSP
Dec.2008 – manufacturedJan 2009 – shipped to KEKJan.2009 shipped to KEKJan.2009…now – firmwaredevelopment, tests
Few modifications have been made
3
NoiseNoise
Some ADC or PCB layout problem
4
Dynamic rangeDynamic range
5
Good linearity It’s needed to use custom Voltages in VME bus:5 7.5, 12 15
Status (1)Status (1)
Things to be done with this board:
1. ADC replacement.1. ADC replacement.
2. coherent noise
3. Small firmware update: S/N, temperatures read out and a few other thingsg
6
Status (2)Status (2)
W d th d t t ith ti l li kWe need the new readout system with optical links to make the design ECL data collector and test waveform analysis on the Shaper‐DSP module!waveform analysis on the Shaper DSP module!
The new version of the Shaper DSP module will beThe new version of the Shaper‐DSP module will be designed by April 2009:
1 ADC redesign1. ADC redesign2. The capacitors issue: Tantalum ceramic (???)3 Supply3. Supply4. Tail compensation for FAM
7
Thank you
8
BackupBackup
9
Waveform fittingWaveform fitting
( ) ( ) ( )signal the of time and pedestal Amplitude,:parameters fitting−
→−−−−−−=∑ −
0
,0
100
2
,,
min)()(,,ji
jjijii
tpA
pttAfySpttAfytpAχ
values. sampled response, counter
matrix, covariance
−−
−−−=
)(
))((
i
jiij
ytf
yyyyS
,iteration) first at time (trigger time initial whereΔ−=Δ+=
−−′+−=−′Δ−−=Δ−−
1
1
11111
.,
)()()()()(
o
iiiii
tABtttt
ttfBttAfttftAttAftttAf
=
−==
=
⇒
=++
=++
=++
⇒
=−′−−
=−′−−′
=−′−−
∑∑
∑
∑∑∑
∑∑∑
−
−
−
1
1
1111
1111
111
111
10,
,
3333231
2232221
1131211
1,
,,1
,
,,,
1,
/;
0)(
0)(
0)(
iti
iiti
iiti
itttt
iitttt
iitttt
tjtjjij
jitjtjjijti
jitjtjjijti
yp
ABttyB
yA
ybpaBaAa
ybpaBaAa
ybpaBaAa
pfBAfyS
pfBAfySf
pfBAfySf
γ
β
α
tscoefficien dprecompute and , where −−′=′−=
∑∑∑
11111
1111111
,,,1,1,
,,
,,
,,)(),(
0)(
tititiitiiti
iiti
iitttt
jitjtjjij
αttffttff
ypyppfBAfyS
γβ
γ
10
ECL FINESSEECL FINESSE
11
Shaper ADC and ECL FINESSEShaper‐ADC and ECL FINESSE
12