A Background Timing Skew Calibration Technique in Time-Interleaved ADCs With Second Order Compensation

2018 ◽  
Author(s):  
Dengquan Li ◽  
Ruixue Ding ◽  
Zhangming Zhu ◽  
Yintang Yang
Keyword(s):  
Second Order ◽  
Calibration Technique ◽  
Time Interleaved ◽  
Timing Skew

scholarly journals Time-Interleaved SAR ADC with Background Timing-Skew Calibration for UWB Wireless Communication in IoT Systems

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2430 ◽  
Author(s):  
Kiho Seong ◽  
Dong-Kyu Jung ◽  
Dong-Hyun Yoon ◽  
Jae-Soub Han ◽  
Ju-Eon Kim ◽  
...  
Keyword(s):  
Wireless Communication ◽  
High Speed ◽  
Dynamic Range ◽  
Sar Adc ◽  
Ultra Wideband ◽  
Total Power ◽  
Calibration Technique ◽  
Comparator Offset ◽  
Time Interleaved ◽  
Timing Skew

Ultra-wideband (UWB) wireless communication is prospering as a powerful partner of the Internet-of-things (IoT). Due to the ongoing development of UWB wireless communications, the demand for high-speed and medium resolution analog-to-digital converters (ADCs) continues to grow. The successive approximation register (SAR) ADCs are the most powerful candidate to meet these demands, attracting both industries and academia. In particular, recent time-interleaved SAR ADCs show that multi-giga sample per second (GS/s) can be achieved by overcoming the challenges of high-speed implementation of existing SAR ADCs. However, there are still critical issues that need to be addressed before the time-interleaved SAR ADCs can be applied in real commercial applications. The most well-known problem is that the time-interleaved SAR ADC architecture requires multiple sub-ADCs, and the mismatches between these sub-ADCs can significantly degrade overall ADC performance. And one of the most difficult mismatches to solve is the sampling timing skew. Recently, research to solve this timing-skew problem has been intensively studied. In this paper, we focus on the cutting-edge timing-skew calibration technique using a window detector. Based on the pros and cons analysis of the existing techniques, we come up with an idea that increases the benefits of the window detector-based timing-skew calibration techniques and minimizes the power and area overheads. Finally, through the continuous development of this idea, we propose a timing-skew calibration technique using a comparator offset-based window detector. To demonstrate the effectiveness of the proposed technique, intensive works were performed, including the design of a 7-bit, 2.5 GS/s 5-channel time-interleaved SAR ADC and various simulations, and the results prove excellent efficacy of signal-to-noise and distortion ratio (SNDR) and spurious-free dynamic range (SFDR) of 40.79 dB and 48.97 dB at Nyquist frequency, respectively, while the proposed window detector occupies only 6.5% of the total active area, and consumes 11% of the total power.

An adaptive calibration technique of timing skew mismatch in time-interleaved analog-to-digital converters

2019 ◽  
Vol 90 (2) ◽  
pp. 025102 ◽  
Author(s):  
Jian Gao ◽  
Peng Ye ◽  
Hao Zeng ◽  
Jinpeng Song ◽  
Wentao Wei ◽  
...  
Keyword(s):  
Analog To Digital Converters ◽  
Calibration Technique ◽  
Analog To Digital ◽  
Adaptive Calibration ◽  
Time Interleaved ◽  
Timing Skew

A 7-bit 2 GS/s Time-Interleaved SAR ADC With Timing Skew Calibration Based on Current Integrating Sampler

2020 ◽  
pp. 1-12
Author(s):  
Wenning Jiang ◽  
Yan Zhu ◽  
Chi-Hang Chan ◽  
Boris Murmann ◽  
Rui Paulo Martins
Keyword(s):  
Sar Adc ◽  
Time Interleaved ◽  
Timing Skew

scholarly journals A novel two-channel time-interleaved second-order ΣΔ modulator

2008 ◽  
Vol 5 (11) ◽  
pp. 424-430 ◽  
Author(s):  
Xiao Yang ◽  
Guican Chen
Keyword(s):  
Second Order ◽  
Σδ Modulator ◽  
Time Interleaved
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