A Simple Technique for Signal Compression in High Dynamic Range, High Speed X-ray Pixel Detectors

Fiorini, C.; Nasri, B.; Facchinetti, Stefano; Bombelli, L.; Fischer, P.; Porro, M.

doi:10.1109/tns.2014.2340899

Cited by 17 publications

(8 citation statements)

References 7 publications

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“…The noise is 23 e-rms. The slight improvement with respect to the previous measurement can be justified by the better performance of the filter with the shorter flat-top with respect to the 1/f noise contribution [5].…”

Section: Evaluation Of the Noise Performance Of The Improved Day-0 Fr...mentioning

confidence: 69%

“…This voltage across the resistor reduces the absolute value of the drain-source voltage of the PMOSFET and pushes it to operate deeper in the triode regime. Therefore, a nonlinear behaviour of the PMOSFET can be obtained [5].…”

Section: Day-0 Solutionmentioning

confidence: 99%

“…Measurements based on this prototype have confirmed the working principle of the Day-0 solution. The maximum transconductance about 1.0mS was measured [5]. Moreover, a preliminary noise evaluation of the front-end was performed by connecting the ASIC to a test SDD detector.…”

Section: Day-0 Solutionmentioning

confidence: 99%

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A front-end stage with signal compression capability for XFEL detectors

et al. 2015

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In this work, we present a front-end stage with signal compression capability to be used in detectors for the new European XFEL in Hamburg. This front-end is an alternative solution under study for the DEPFET Sensor with Signal Compression (DSSC) detection system for the European XFEL. The DEPFET sensor of the DSSC project has a high dynamic range and very good noise performance. The high gain for small collected charge and the compression for large signals will provide both desired features of single photon detection capability and wide dynamic range. However, manufacturing of the DEPFET sensor requires a sophisticated processing technology with a relatively long time fabrication process. Accordingly, an alternative solution, namely Day-0 solution, was introduced as an approach characterized not by the best performance of the DEPFET, but available in a shorter time to allow first beam tests and experiments. The alternative sensor is made of mini Silicon Drift Detector (mini-SDD) and the compression behavior is obtained from the front-end on the readout ASIC and not by the transistor integrated in the silicon sensor, as in the DEPFET. The first version of corresponding front-end of the Day-0 solution has been realized based on an input PMOSFET transistor placed on the readout chip. This simple front-end proved the working principle of the proposed compression technique and the desired noise performance. In this paper, an improved version of the Day-0 front-end is presented. In the new prototype, the current gain of the front-end stage has been increased by factor of 1.8, the total input capacitance

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Section: Evaluation Of the Noise Performance Of The Improved Day-0 Fr...mentioning

confidence: 69%

Section: Day-0 Solutionmentioning

confidence: 99%

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A front-end stage with signal compression capability for XFEL detectors

et al. 2015

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“…In the DEPFET Sensor with Signal Compression (DSSC) [3] the non-linear characteristic is achieved at sensor level by exploiting the feature of the DSSC device. In the frame of the DSSC collaboration, other solutions, in which the signal compression is obtained at front-end level, have been recently proposed in [4], [5]. In the LPD (Large Pixel Detector), project three channels with different gains are read out in parallel.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Compression of the Signal in a Charge Sensitive Amplifier: From Concept to Design

Manghisoni

Comotti

Gaioni

et al. 2015

IEEE Trans. Nucl. Sci.

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This work is concerned with the design of a lownoise Charge Sensitive Amplifier featuring a dynamic signal compression based on the non-linear features of an inversionmode MOS capacitor. These features make the device suitable for applications where a non-linear characteristic of the frontend is required, such as in imaging instrumentation for free electron laser experiments. The aim of the paper is to discuss a methodology for the proper design of the feedback network enabling the dynamic signal compression. Starting from this compression solution, the design of a low-noise Charge Sensitive Amplifier is also discussed. The study has been carried out by referring to a 65 nm CMOS technology.

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“…In the DEPFET Sensor with Signal Compression (DSSC) [1] the non-linear characteristic is achieved at sensor level by exploiting the feature of the DSSC device. In the frame of the DSSC collaboration, other solutions, in which the signal compression is obtained at front-end level, have been recently proposed in [2,3]. In the LPD project, each cell features three channels, each with a different gain, which are all read out in parallel.…”

Section: Introductionmentioning

confidence: 99%

Novel active signal compression in low-noise analog readout at future X-ray FEL facilities

et al. 2015

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This work presents the design of a low-noise front-end implementing a novel active signal compression technique. This feature can be exploited in the design of analog readout channels for application to the next generation free electron laser (FEL) experiments. The readout architecture includes the low-noise charge sensitive amplifier (CSA) with dynamic signal compression, a time variant shaper used to process the signal at the preamplifier output and a 10-bit successive approximation register (SAR) analog-to-digital converter (ADC). The channel will be operated in such a way to cope with the high frame rate (exceeding 1 MHz) foreseen for future XFEL machines. The choice of a 65 nm CMOS technology has been made in order to include all the building blocks in the target pixel pitch of 100 µm. This work has been carried out in the frame of the PixFEL Project funded by the Istituto Nazionale di Fisica Nucleare (INFN), Italy.

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A Simple Technique for Signal Compression in High Dynamic Range, High Speed X-ray Pixel Detectors

Cited by 17 publications

References 7 publications

A front-end stage with signal compression capability for XFEL detectors

A front-end stage with signal compression capability for XFEL detectors

Dynamic Compression of the Signal in a Charge Sensitive Amplifier: From Concept to Design

Novel active signal compression in low-noise analog readout at future X-ray FEL facilities

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