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Velo Workshop on Hybrids and Chips
Niels van Bakel, Martin van Beuzekom, Jo van den Brand, Eddy Jans, Sander Klous, Hans Verkooijen(NIKHEF Amsterdam)
Daniel Baumeister, Werner Hofmann, Karl-Tasso Knöpfle, Sven Löchner, Michael Schmelling, Edgar Sexauer,Ulrich Trunk
(Max-Planck-Institute for Nuclear Physics Heidelberg)
Martin Feuerstack-Raible(University of Heidelberg)
Results from Beetle 1.1 Ulrich TrunkASIC-Labor Heidelberg, Max-Planck-Institut für Kernphysik, Heidelberg
1
News from
29 August 2001, CERN, Geneva
Velo Workshop on Hybrids and Chips
Results from Beetle 1.1
2
Beetle 1.1: Test Results�
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Chip is programmable via I CAll on-chip registers can be read back via I CAll readout modes (32 4, 64 2 and 128 1) workPipeline address (column number) shows correct values and levelsControl logic circuits work correct:
2
2
→ → →
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WriteMon and TrigMon circulate with the programmed distanceA trigger reduces this distance by one clock cycleFifoFull becomes active after 16 consecutive triggersInternal test pulse generator works
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Pulse ShapesBaseline and control VoltagesComparatorsBinary Readout
Not yet tested:NoiseComparator threshold
Ulrich TrunkASIC-Labor Heidelberg, Max-Planck-Institut für Kernphysik, Heidelberg
29 August 2001, CERN, Geneva
Velo Workshop on Hybrids and Chips
Results from Beetle 1.1
3
Striping of MPW4The minimum Leff has been varied across the wafer:There are strips with -3 , -1.5 , 0 ,+1.5 and +3Chips cannot be assigned to those L groups
σ σ σ σeff
Ulrich TrunkASIC-Labor Heidelberg, Max-Planck-Institut für Kernphysik, Heidelberg
29 August 2001, CERN, Geneva
Mapping des stripes en PC sur le produit MPW4 (63F5354) :
Expo en DUV sur Micrascan : Notch right
Field size : 20.038*26.756mmChips per field : 2*1chip size : 19.90*13.00mmChips per wafer : 92
Field 1-6 : 85% of nominal doseField 7-13 : 92%Field 16-21 : 115%Field 22-26 : 125%
Velo Workshop on Hybrids and Chips
Results from Beetle 1.1
4
Beetle1.1: Pulse Shapes I
Ulrich TrunkASIC-Labor Heidelberg, Max-Planck-Institut für Kernphysik, Heidelberg
29 August 2001, CERN, Geneva
Beetle 1.1Pulse shapes of the test channel:
3pf (highest amplitude)12.5pf24.6pf32.3pf (lowest amplitude)
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Velo Workshop on Hybrids and Chips
Results from Beetle 1.1
5
Beetle1.1: Pulse Shapes II
Ulrich TrunkASIC-Labor Heidelberg, Max-Planck-Institut für Kernphysik, Heidelberg
29 August 2001, CERN, Geneva
Comparison of NIKHEF and Heidelberg measurements
Velo Workshop on Hybrids and Chips
Results from Beetle 1.1
6
Beetle1.1: Pulse Shapes III
Ulrich TrunkASIC-Labor Heidelberg, Max-Planck-Institut für Kernphysik, Heidelberg
29 August 2001, CERN, Geneva
t [ns]
0,6
0,65
0,7
0,75
0,8
0,85
0,9
0,95
1
0 20 40 60 80 100 120 140 160 180 200
Vfs=0.5 Vfp=0 Ipre=600 Isha=80Ibuf=80
Vfs=0.5 Vfp=0 Ipre=600 Isha=120Ibuf=80
Vfs=0 Vfp=0 Ipre=600 Isha=80 Ibuf=80
Vfs=0 Vfp=0 Ipre=600 Isha=120 Ibuf=80
Velo Workshop on Hybrids and Chips
Results from Beetle 1.1
7
Beetle1.1: Optimized Settings
Ulrich TrunkASIC-Labor Heidelberg, Max-Planck-Institut für Kernphysik, Heidelberg
29 August 2001, CERN, Geneva
Optimized settings for V and V result in a flat baselined dcl
ColumnsR1
R33
R65
R97
Channels
0,5
0,55
0,6
0,65
0,7
0,75
0,8
Velo Workshop on Hybrids and Chips
Results from Beetle 1.1
8
Beetle1.1: Pipeline Scan
Ulrich TrunkASIC-Labor Heidelberg, Max-Planck-Institut für Kernphysik, Heidelberg
29 August 2001, CERN, Geneva
Velo Workshop on Hybrids and Chips
Results from Beetle 1.1
9
Beetle1.1: Binary Readout
Ulrich TrunkASIC-Labor Heidelberg, Max-Planck-Institut für Kernphysik, Heidelberg
29 August 2001, CERN, Geneva
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Binary readout mode worksLevels are 0 and +10 MIP(as designed)Phase of CompClk and Clk
has to match(latched comparator output
is sampled)but...
Velo Workshop on Hybrids and Chips
Results from Beetle 1.110
Beetle1.1: Comparators
Ulrich TrunkASIC-Labor Heidelberg, Max-Planck-Institut für Kernphysik, Heidelberg
29 August 2001, CERN, Geneva
Comparators intrack mode (top)pulse mode (bottom)
Comparator outputs(left)Binary readout (right)
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� Level shifter is too slowcauses spill-overto the second BX
Velo Workshop on Hybrids and Chips
Results from Beetle 1.111
Beetle1.1: Outlook
Ulrich TrunkASIC-Labor Heidelberg, Max-Planck-Institut für Kernphysik, Heidelberg
29 August 2001, CERN, Geneva
Bugs found:Frontend too slow and too low rate capability (known)Voltage divider for binary readout too slow
Still to be measured:Noise (PCB for that purpose is ready)Comparator threshold and crosstalkNew BeetleFE and BeetleSR chips(which arrived last week)
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m
m
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