[PPT] - Updates on the PASTA Chip Front-End Valen&no Di Pietro II. PowerPoint Presentation

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Updates on the PASTA Chip Front-End

Valen&no ¡Di ¡Pietro ¡

II. ¡Physikalisches ¡Ins&tut, ¡JLU ¡Gießen ¡

¡ ¡

PANDA ¡XLVII. ¡Collabora&on ¡Mee&ng ¡ GSI, ¡December ¡10th, ¡2013 ¡

¡

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PASTA Chip

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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PASTA Chip

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Based on TOFPET

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PASTA Chip

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Based on TOFPET New design

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TOFPET Front-End: Schematic

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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TOFPET Front-End: Schematic

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Common Gate Stage

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TOFPET Front-End: Performance

Linearity Noise

Panda XLVII. Collaboration Meeting, GSI

December 10th, 2013 Valentino Di Pietro

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Simulations by Manuel D. Rolo

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TOFPET Front-End: Performance

Linearity Noise

Panda XLVII. Collaboration Meeting, GSI

December 10th, 2013 Valentino Di Pietro

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Simulations by Manuel D. Rolo PASTA working range

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Back to September

FRONT-END CHAIN

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Back to September

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Capable to process ONLY negative polarity signals

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Back to September

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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OK

Capable to process ONLY negative polarity signals

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Back to September

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Main cause of the non-linearity of the system

OK

Capable to process ONLY negative polarity signals

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Back to September

Not yet designed

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Main cause of the non-linearity of the system

OK

Capable to process ONLY negative polarity signals

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Old Chain Performance

Linearity Noise

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Updates

Ø Introduction of a dual-polarity capable architecture in the first stage (based on the

design made by the BNL group for ATLAS Muon Spectrometer Upgrade)

Ø First attempts to optimize the ToT Stage in order to reduce the non-linearity

bserved for low charges

Ø Design of an hysteresis comparator in

rder to be less sensitive to the noise

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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BNL Architecture

Panda XLVII. Collaboration Meeting, GSI

December 10th, 2013 Valentino Di Pietro

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Slide from “VMM – a self-triggered front-end ASIC for ATLAS upgrades” by G. De Geronimo

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PASTA Preamplifier Stage

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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PASTA Preamplifier Stage

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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New Output Stage

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PASTA Preamplifier Stage

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Closed

Negative Plarity Configuration

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PASTA Preamplifier Stage

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Closed

Positive Plarity Configuration

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Negative Polarity Input: Linearity

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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MIP

nonLinearity = Mean ToT Qin

( )− f Qin ( )

ToT Qin

( )

" # $ $ % & ' ' = 0.21%

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Positive Polarity Input: Linearity

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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MIP

nonLinearity = Mean ToT Qin

( )− f Qin ( )

ToT Qin

( )

" # $ $ % & ' ' = 3.27%

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“Dynamic” ToT Stage

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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“Dynamic” ToT Stage

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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IDEAL

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Negative Polarity Input

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Negative Polarity Input

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Minimum detected charge >1fC

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Positive Polarity Input

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Details about the Threshold

Ø Considering a minimum event rate per channel equal to 1kHz, the threshold to have a noise frequency of 1% is:

VTH = −2ln(4 3 ⋅tpeak ⋅ fn) ⋅Vn,rms

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Rice, S.O. (1944). “Mathematical Analysis of Random Noise”

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Details about the Threshold

Ø Considering a minimum event rate per channel equal to 1kHz, the threshold to have a noise frequency of 1% is:

VTH = −2ln(4 3 ⋅tpeak ⋅ fn) ⋅Vn,rms

Peaking Time Noise Frequency Rms Noise

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Rice, S.O. (1944). “Mathematical Analysis of Random Noise”

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Negative Polarity Input: Noise

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Negative Polarity Input: Noise

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Working Range

Longer Strips Capacitance

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Positive Polarity Input: Noise

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Positive Polarity Input: Noise

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Working Range

Longer Strips Capacitance

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Some important parameters

Parameters Parameters (Qin

in=1fC)

=1fC) Negative Negative Polarity Polarity Input Input Positive Positive Polarity Polarity input input ENC ENC 1.1ke- 800e- SNR ( SNR (Qin

in=4fC)

=4fC) ~ 52 ~ 61 tpeak

peak

21.6ns 23.9ns Output Output rms rms Noise Noise 1.6mV 3.8mV Signal Signal length length (Qin

in=40fC)

=40fC) ~430ns ~400ns

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Old VS New chain

ü Dual-polarity capability ü ENCMAX[Cdet=20pF]: ~1.4ke- à ~1.1ke- (ATLAS noise ~1.5ke-) ✗ Maximum signal length: x2 before

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Conclusions and Perspectives

Ø First two stages: ready for layout Ø Last stage: under study Ø Comparator: layout done Ø Understand key parameters Ø Layout all the stages Ø Submit

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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Conclusions and Perspectives

Ø First two stages: ready for layout Ø Last stage: under study Ø Comparator: layout done Ø Understand key parameters Ø Layout all the stages Ø Submit

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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SLIDE 39

Thank you for your kind attention

SLIDE 40

Backup Slides

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NIP Configuration

Linearity Residual Plot

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

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PIP Configuration

Linearity Residual Plot

Panda XLVII. Collaboration Meeting, GSI December 10th, 2013 Valentino Di Pietro

Updates on the PASTA Chip Front-End

¡ ¡

¡

Contents

① TOFPET front-end

② Looking back to September

③ Updates

④ Conclusions and perspectives

PASTA Chip

PASTA Chip

Based on TOFPET

PASTA Chip

Based on TOFPET New design

TOFPET Front-End: Schematic

TOFPET Front-End: Schematic

Common Gate Stage

TOFPET Front-End: Performance

TOFPET Front-End: Performance

Back to September

FRONT-END CHAIN

Back to September

Back to September

OK

Back to September

OK

Back to September

OK

Old Chain Performance

Updates

BNL Architecture

PASTA Preamplifier Stage

PASTA Preamplifier Stage

New Output Stage

PASTA Preamplifier Stage

Negative Plarity Configuration

PASTA Preamplifier Stage

Positive Plarity Configuration

Negative Polarity Input: Linearity

Positive Polarity Input: Linearity

“Dynamic” ToT Stage

“Dynamic” ToT Stage

IDEAL

Negative Polarity Input

Negative Polarity Input

Positive Polarity Input

Details about the Threshold

Ø Considering a minimum event rate per channel equal to 1kHz, the threshold to have a noise frequency of 1% is:

VTH = −2ln(4 3 ⋅tpeak ⋅ fn) ⋅Vn,rms

Details about the Threshold

Ø Considering a minimum event rate per channel equal to 1kHz, the threshold to have a noise frequency of 1% is:

VTH = −2ln(4 3 ⋅tpeak ⋅ fn) ⋅Vn,rms

Negative Polarity Input: Noise

Negative Polarity Input: Noise

Working Range

Positive Polarity Input: Noise

Positive Polarity Input: Noise

Working Range

Some important parameters

Old VS New chain

ü Dual-polarity capability ü ENCMAX[Cdet=20pF]: ~1.4ke- à ~1.1ke- (ATLAS noise ~1.5ke-) ✗ Maximum signal length: x2 before

Conclusions and Perspectives

Ø First two stages: ready for layout Ø Last stage: under study Ø Comparator: layout done Ø Understand key parameters Ø Layout all the stages Ø Submit

Conclusions and Perspectives

Ø First two stages: ready for layout Ø Last stage: under study Ø Comparator: layout done Ø Understand key parameters Ø Layout all the stages Ø Submit

Thank you for your kind attention

Backup Slides

NIP Configuration

PIP Configuration