Development of a fast 12-bit ADC for a nuclear spectroscopy system

Hiền, Đinh Sỹ; Senzaki, Toshihiko

doi:10.1016/s0168-9002(00)00752-x

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…In this particular case (4) indeed becomes much simpler, or (7) which is a single-pole transfer function, where the pole is (8) and it is apparently within the unit circle. The inverse transform of (7), or the -toimpulse response, is the discrete time derivative of an exponential decay with time constant (9) as can be obtained by virtue of the sampling transformation (10) where and are the corresponding representations of the same pole in the continuous and the discrete time domains. Therefore, assuming the preamplifier signal to be a step, it is clear that the ADC signal is a clean exponential decay with time constant (9).…”

Section: Analysis Of the Control Loopmentioning

confidence: 99%

“…In this paper we show that a "sliding-scale correction" device [5]- [10] inserted into a negative-feedback control loop helps prevent ADC saturation. The proposed circuit structure uses a digital-to-analog converter (DAC) to add a proper countervoltage to the preamplifier signal and controls it through a proportional-integral (P-I) controller placed along the feedback loop.…”

Section: Introductionmentioning

confidence: 95%

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Digitized preamplifiers: a circuit structure for sliding-scale optimization of the ADC range

Pullia

Riboldi

Franchi

et al. 2006

IEEE Trans. Nucl. Sci.

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This work deals with the digitization of chargepreamplifier waveforms obtained from X-ray and -ray sensors. We suggest that the well-known "sliding-scale correction" structure can be inserted into a negative-feedback control loop to cancel the signal walks brought about by event pileup, low-frequency disturbances, microphonism, and hum. Cancellation of the walks permits to use the full analog-to-digital converter (ADC) range for the signals, even in high event rate conditions. The signal distortion caused by such cancellation is then eliminated numerically by the sliding-scale mechanism. As a result an extended dynamic range is obtained. Using a 12-bit ADC we got two extra bits to accomodate the baseline walks and 1.14 to 1.43 extra bits on individual signals with 0.1 to 1 s rise time.

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Section: Analysis Of the Control Loopmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Digitized preamplifiers: a circuit structure for sliding-scale optimization of the ADC range

Pullia

Riboldi

Franchi

et al. 2006

IEEE Trans. Nucl. Sci.

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“…Recently, great progress has been made in the digital processing technique. Faster digital signal processors, microprocessors and ADCs are developed and also applied in nuclear instruments [2,3]. Sampling and recording the pulse waveform is becoming much easier and affordable.…”

Section: Introductionmentioning

confidence: 99%

“…where V om is the amplitude of the pulse, and t m represents the time reaching the highest point. Taking into account the noise, the real P H is given by (3).…”

Section: Introductionmentioning

confidence: 99%

A novel acquisition method for nuclear spectra based on pulse area analysis

et al. 2015

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“…These instruments are designed for high precision γ-ray spectroscopy with HPGe detectors and directly compatible with scintillator/PMT combinations: NaI, CsI, BGO, etc. As known, The DGF Pixie-4 is a multichannel data acquisition system for nuclear physics and other applications requiring coincident radiation detection (XIA LLC 2009 ), or the work for development of a fast flash ADC for nuclear spectroscopy system (Hien and Toshihiko 2001 ), or the issue for development of an FPGA based coincident system (Khang et al 2013 ). Owing to a flexible inner structure in defining and changing the functions of electronics circuits by programming, FPGA expresses its capability for applying in gamma ray spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

In-house development of an FPGA-based MCA8K for gamma-ray spectrometer

Lanh

Sơn

2014

SpringerPlus

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The objective of this work is domestic development of electronics instruments. It used for measuring ionization radiation and practical training at Nuclear Research Institute (NRI), Dalat, Vietnam. The aim of this work is to study and develop a novel MCA8k for Gamma-ray spectrometer concerning experimental nuclear physics. An approach for design and construction of the aforementioned instrument is to apply logic integrating techniques via Field Programmable Gate Arrays (FPGA) under Max + PlusII, Altera. The instrument allows interfacing to PC with self-developed application software. Scientific significance of this work is partly to contribute to opening a research direction in the field of nuclear electronics science for design and construction of radiation measurement instruments with the advanced IC technology in Vietnam. Practical significance of this work is partly to contribute to enhancement of capabilities in developing radiation measurement instruments for experimental research as well as practical training in nuclear physics. The advantages of FPGA: overcoming ballistic deficit, decrement of serial and parallel noise, flexible in programming, control of the system by software without an interfere of hardware. The disadvantages of FPGA: requirement of good knowledge of VHDL and professional tools for development of a expected project. A new electronics module of MCA8k has been achieved. Some main results obtained from the experimental testing are as follows: differential nonlinearity (DNL) of FPGA-MCA8k approximately 1.27%, integral nonlinearity (INL) = 0.607%, time conversion ≈ 2.2 μs, deadtime (DT) is 0.75%. Data Acquisition Program MCANRI written in VC + +6.0, self-executed under Windows XP environment.

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Development of a fast 12-bit ADC for a nuclear spectroscopy system

Cited by 8 publications

References 7 publications

Digitized preamplifiers: a circuit structure for sliding-scale optimization of the ADC range

Digitized preamplifiers: a circuit structure for sliding-scale optimization of the ADC range

A novel acquisition method for nuclear spectra based on pulse area analysis

In-house development of an FPGA-based MCA8K for gamma-ray spectrometer

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