A 0.4-to-1 V Voltage Scalable $\Delta \Sigma $ ADC With Two-Step Hybrid Integrator for IoT Sensor Applications in 65-nm LP CMOS

Park, Jun-Eun; Hwang, Young‐Ha; Jeong, Deog‐Kyoon

doi:10.1109/tcsii.2017.2753841

Cited by 21 publications

(6 citation statements)

References 10 publications

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“…As shown in Table 4 , the listed devices [ 19 , 23 , 24 ] are the closest designs in terms of FoM to the proposed ADC. The main distinguishing factor of this work is the high dynamic range, since it uses the noise cancellation logic to suppress in-band noise.…”

Section: Resultsmentioning

confidence: 99%

A High-Dynamic-Range Switched-Capacitor Sigma-Delta ADC for Digital Micromechanical Vibration Gyroscopes

Chen

Liu

2018

Micromachines

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This paper presents a multi-stage noise shaping (MASH) switched-capacitor (SC) sigma-delta (ΣΔ) analog-to-digital converter (ADC) composed of an analog modulator with an on-chip noise cancellation logic and a reconfigurable digital decimator for MEMS digital gyroscope applications. A MASH 2-1-1 structure is employed to guarantee an absolutely stable modulation system. Based on the over-sampling and noise-shaping techniques, the core modulator architecture is a cascade of three single-loop stages containing feedback paths for systematic optimization to avoid deterioration in conversion accuracy caused by capacitor mismatch. A digital noise cancellation logic is also included to eliminate residual quantization errors in the former two stages, and those in the last stage are shaped by a fourth-order modulation. A multi-rate decimator follows the analog modulator to suit variable gyroscope bandwidth. Manufactured in a standard 0.35 μm CMOS technology, the whole chip occupies an area of 3.8 mm2. Experimental results show a maximum signal-to-noise ratio (SNR) of 100.2 dB and an overall dynamic range (DR) of 107.6 dB, with a power consumption of 3.2 mW from a 5 V supply. This corresponds to a state-of-the-art figure-of-merit (FoM) of 165.6 dB.

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Section: Resultsmentioning

confidence: 99%

A High-Dynamic-Range Switched-Capacitor Sigma-Delta ADC for Digital Micromechanical Vibration Gyroscopes

Chen

Liu

2018

Micromachines

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“…Literature offers several solutions, in [65] A 0.4-to-1 V Voltage Scalable ADC with Two-Step Hybrid Integrator in 65 nm CMOS is presented. Such devices present a scalable power consumption and bandwidth with maintaining an SNDR higher than 60dB.…”

Section: F Analog To Digital Conversionmentioning

confidence: 99%

E-health-IoT Universe: A Review

Scarpato¹,

Pieroni²,

Nunzio³

et al. 2017

International Journal on Advanced Science, Engineering and Information Technology

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The Internet of Things (IoT) devices are able to collect and share data directly with other devices through the cloud environment, providing a huge amount of information to be gathered, stored and analyzed for data-analytics processes. The scenarios in which the IoT devices may be useful are amazing varying, from automotive, to industrial automation or remote monitoring of domestic environment. Furthermore, has been proved that healthcare applications represent an important field of interest for IoT devices, due to the capability of improving the access to care, reducing the cost of healthcare and most importantly increasing the quality of life of the patients. In this paper, we analyze the state-of-art of IoT in medical environment, illustrating an extended range of IoT-driven healthcare applications that, however, still need innovative and high technology-based solutions to be considered ready to market. In particular, problems regarding characteristics of response-time and precision will be examined. Furthermore, wearable and energy saving properties will be investigated in this paper and also the IT architectures able to ensure security and privacy during the all data-transmission process. Finally, considerations about data mining applications, such as risks prediction, classification and clustering will be provided, that are considered fundamental issues to ensure the accuracy of the care processes.

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“…Complex timing control logic must also be employed to properly share the op-amps among different stages. Alternative techniques attempt to replace the op-amps with other blocks, such as zero-crossing detectors [3], [4], dynamic-comparators [5], and inverters [6]. modulators with zero-crossing detectors can hardly achieve high resolution due to the voltage overshoots caused by delays from the zero-crossing event to the stable detection result generated, while the accuracy of modulators employing comparator-based and inverter-based integrators is mainly impaired by their limited dc gain and input-referred offset.…”

Section: Introductionmentioning

confidence: 99%

Passive SC $\Delta\Sigma$ Modulator Based on Pipelined Charge-Sharing Rotation in 28-nm CMOS

Wang

Schembari

Staszewski

2020

IEEE Trans. Circuits Syst. I

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In this paper, we introduce a new switchedcapacitor (SC) passive delta-sigma () modulator architecture. It is based on a charge-sharing rotation technique, which eliminates any inter-stage loading effects that plague the conventional SC passive modulators. To improve the proposed modulator's noise suppression and stability, an independent extra feedback path and a zeroing stage are added to the 2 nd -stage integrator. Moreover, a pipelining (i.e. interleaving) technique is employed in the passive low-pass filter to relax settling requirements and improve power efficiency. Compared to the modulators with active integrators, the proposed modulator contains only switches, capacitors and one comparator, thus being greatly amenable to nanoscale CMOS process nodes. Implemented in 28-nm CMOS, the proposed ADC occupies a core area of 0.059 mm 2 . It achieves measured SNDR of 81.1 dB and a measured dynamic range (DR) of 83.6 dB with a signal bandwidth of 80 kHz at 40.96 MS/s, while consuming 101.5 μW. SNDR is maintained above 70 dB across a ±20% supply variation.

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A 0.4-to-1 V Voltage Scalable $\Delta \Sigma $ ADC With Two-Step Hybrid Integrator for IoT Sensor Applications in 65-nm LP CMOS

Cited by 21 publications

References 10 publications

A High-Dynamic-Range Switched-Capacitor Sigma-Delta ADC for Digital Micromechanical Vibration Gyroscopes

A High-Dynamic-Range Switched-Capacitor Sigma-Delta ADC for Digital Micromechanical Vibration Gyroscopes

E-health-IoT Universe: A Review

Passive SC $\Delta\Sigma$ Modulator Based on Pipelined Charge-Sharing Rotation in 28-nm CMOS

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