An 8-Gs/s 12-Bit TIADC System With Real-Time Broadband Mismatch Error Correction

Liu, Zhao; Jiang, Zaihong; Dong, Ruoshi; Cao, Zhe; Gao, Xin; Cheng, Bing; Hu, Jiadong; Liu, Shubin; An, Qi

doi:10.1109/tns.2018.2878875

Cited by 13 publications

(3 citation statements)

References 31 publications

(20 reference statements)

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“…Foreground calibration involves offline mismatch estimation method to obtain mismatch parameters, and then designs the correction process based on these parameters. For instance, the perfect reconstruction (PR) [8,9] method utilizes the sine fitting method for calibration and then designs an FIR filter to filter the data. Background calibration, on the other hand, involves performing parameter calibration and system correction simultaneously during the sampling process.…”

Section: Jinst 18 P05024mentioning

confidence: 99%

Design of an X-ray diagnosis system with TIADC

Jin

Chen

et al. 2023

J. Inst.

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X-ray diagnosis is a crucial aspect of nuclear experiments, as many fields in physical research require X-ray analysis. The X-ray diode (XRD) detector is commonly used in X-ray detection due to its short response time, necessitating a high-speed readout circuit. In this paper, we present the design of an X-ray diagnosis system with readout electronics utilizing time-interleaved analog-to-digital converters (TIADC). One of the challenging problems in TIADC is the mismatch problem between channels, which severely reduces the system's performance. We propose a fast calibration method for adjusting the mismatch, significantly improving the acquisition system's performance. We have implemented an adapted module to perform the calibration in real-time. In performance tests, the proposed method is shown to be as effective as other methods, and the electronic performance of the system meets the diagnosis requirements. The X-ray signals acquired by this system exhibit high quality in the inertial confinement fusion (ICF) of the SG-III laser facility.

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Section: Jinst 18 P05024mentioning

confidence: 99%

Design of an X-ray diagnosis system with TIADC

Jin

Chen

et al. 2023

J. Inst.

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“…In the high-speed analog to digital conversion circuit, usually the phase-locked loop (PLL) is used to obtain a low phase noise so that the system can achieve a high signal-to-noise ratio (SNR) [17]. However, the disadvantage of the PLL is the large power dissipation.…”

Section: Data Acquisition Modulementioning

confidence: 99%

Design of a Prototype in-situ Gamma-ray Spectrometer for Deep Sea

et al. 2020

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Research on the in-situ environment in deep sea is a new focus in marine science. In this work, a prototype in-situ gamma-ray spectrometer was designed in order to measure the gamma-ray spectrum of the environment at about 5000 meters underwater in the South China Sea. The new spectrometer consists of an NaI(Tl) crystal, a photomultiplier tube (PMT), and its electronics. The full digital processing method is implemented in the electronics system, including waveform digitization and digital filtering, to build a general readout platform for various scintillator material based gamma-ray detection. The prototype electronics system is comprised of three modules, which are responsible for analog signal conditioning and high-speed high-resolution waveform digitization, as well as digital filtering, data buffering and transferring based on the field programmable gate array (FPGA). Tests were also conducted to evaluate the system performance. The results indicate that this gamma-ray spectrometer prototype achieves energy range from 60 keV to 3 MeV and full width at half maxima (FWHM) resolutions of 7.5% at 662 keV and 8.8% at 511 keV, which are above the application requirement.

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“…In TIADC systems, channel mismatches seriously degrade the signalto-noise and distortion ratio (SNDR) and spurious-free dynamic range (SFDR) [18,19,20,21,22,23,24,25,26,27,28,29]. In published literature, studies of TIADC are based on the effects of channel mismatches on the spectrum or dynamic performance such as SNDR and SFDR [14,16,17,18,19,20,21,22,23,24,25,26,27,29,30,31,32]. Under the condition of large bandwidth, it is impossible to eliminate channel mismatches completely.…”

Section: Introductionmentioning

confidence: 99%

Analysis of TIADC channel mismatch effects on high-resolution range profile

Xiao

Zhang

2020

IEICE Electron. Express

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The wideband echo signals of the imaging radar can be processed by pulse compression to obtain high-resolution range profile (HRRP). The resolution of HRRP is proportional to the signal bandwidth. The pursuit of high resolution makes the bandwidth of radar transmitting signal larger and larger. And the corresponding sampling rate of receiver becomes so high that analog-to-digital conversion cannot be realized by a single chip correctly. Time-interleaved analog-to-digital converter (TIADC) technique increases sampling rate of radar receiver, but channel mismatches are brought in. Channel mismatches significantly deteriorate the dynamic performance of radar receiver. Effects of channel mismatch on SNR, SNDR and SFDR are studied in previous literatures. Derivation and simulation of TIADC channel mismatch effecting on HRRP are performed in this letter. Simulation results show that without considering the amplitude-frequency distortion and phase-frequency distortions of the radar system, when the gain mismatch is less than 0.7 times and the clock mismatch is less than 0.25 rad, the influence of the channel mismatch on the HRRP can be neglected. The results provide a reference for system design and compensation method, which are useful for the designer to determine whether complex channel mismatch calibration is necessary under specific application background.

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An 8-Gs/s 12-Bit TIADC System With Real-Time Broadband Mismatch Error Correction

Cited by 13 publications

References 31 publications

Design of an X-ray diagnosis system with TIADC

Design of an X-ray diagnosis system with TIADC

Design of a Prototype in-situ Gamma-ray Spectrometer for Deep Sea

Analysis of TIADC channel mismatch effects on high-resolution range profile

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