28.4 A 400mV<sub>pp</sub> 92.3 dB-SNDR 1kHz-BW 2<sup>nd</sup>-Order VCO-Based ExG-to-Digital Front-End Using a Multiphase Gated-Inverted Ring-Oscillator Quantizer

Pochet, Corentin; Huang, Jiannan; Mercier, Patrick P.; Hall, Drew A.

doi:10.1109/isscc42613.2021.9365985

Cited by 16 publications

(5 citation statements)

References 3 publications

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“…For a dual-edge-triggered configuration (λ = 2), the fine phase quantization has a quantization step of μ/N φ , while the multi-bit QSD provides the coarse phase quantization with quantization step μ. The coarse-fine structure has most of the advantages of the single-bit QSD structures, but without the limiting condition of (12). It should also be noted that when N φ = 1, the fine phase quantization is obsolete, and the coarse-fine structure coincides with the multi-bit QSD structure with N φ = 1.…”

Section: B Readout Power Analysismentioning

confidence: 99%

“…Thus, by combining (4) and (12), it is demonstrated that the number of readout phases with a single-bit QSD readout N φ,sQSD is limited by the following condition:…”

Section: A Effects Of Increasing N φ For a Given Sqnr And F Bmentioning

confidence: 99%

“…1) Optimal Readout Structure Without Decimation: The single-bit QSD (solid blue curves in Fig. 3) can only be used when f s ≥ 2 f VCO max , due to (12). Hence, the corresponding curves are confined to the right part of each plot.…”

Section: B Readout Power Analysismentioning

confidence: 99%

“…One of the most successful time-encoding analog-to-digital conversion techniques to date is based on voltage-controlled oscillators (VCOs) [8]- [11]. Thanks to their simplicity, their highly-digital nature and their intrinsic integrating property, VCO-based ADCs are now used in a vast variety of frequency ranges and application domains, such as biomedical [12]- [14], sensor readout [15]- [18], Internet of Things [19]- [21], wideband wireless [22]- [24] and telecom [25]- [28].…”

Section: Introductionmentioning

confidence: 99%

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Methodology for Readout and Ring Oscillator Optimization Toward Energy-Efficient VCO-Based ADCs

Borgmans

Sacco

Rombouts

et al. 2022

IEEE Trans. Circuits Syst. I

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For the design of ring oscillator-based ADCs, little has been reported on how to optimally co-design the readout scheme and the ring oscillator core towards optimal energy efficiency. This paper describes a methodology to find this optimum for a target SQNR and signal bandwidth, for the case of 1 st -order quantization noise shaping. In short, starting from initial assumptions on the VCO, the readout optimization boils down to finding the best VCO frequency. From this, the number of readout phases, the sampling frequency of the readout and the number of bits in the quantizers are derived. Then, it is explained how to adjust the VCO core toward the corresponding optimal VCO configuration. This is discussed for the case of a current-controlled ring oscillator, indicating the main constraints that define the design space for such a VCO optimization. If the actual VCO configuration is bounded by practical constraints, this approach can be re-iterated where a new readout optimization is performed taking these constraints into account.

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Section: B Readout Power Analysismentioning

confidence: 99%

“…Thus, by combining (4) and (12), it is demonstrated that the number of readout phases with a single-bit QSD readout N φ,sQSD is limited by the following condition:…”

Section: A Effects Of Increasing N φ For a Given Sqnr And F Bmentioning

confidence: 99%

Section: B Readout Power Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Methodology for Readout and Ring Oscillator Optimization Toward Energy-Efficient VCO-Based ADCs

Borgmans

Sacco

Rombouts

et al. 2022

IEEE Trans. Circuits Syst. I

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“…Also, these techniques are typically applied to unary cells, causing an exponential increase of the DAC elements with resolution, which makes them unpractical for DACs beyond 5 bit. One method to solve this problem is to use segmentation [12], [13]. By applying DWA to segmented parts, the total number of used elements is reduced and the logic is simplified.…”

mentioning

confidence: 99%

A 103-dB SFDR Calibration-Free Oversampled SAR ADC With Mismatch Error Shaping and Pre-Comparison Techniques

Shen

Xin

et al. 2022

IEEE J. Solid-State Circuits

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published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User

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A 124 dB dynamic range sigma-delta modulator applied to non-invasive EEG acquisition using chopper-modulated input-scaling-down technique

Chen

Cheng³

et al. 2022

Sci. China Inf. Sci.

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28.4 A 400mV_pp 92.3 dB-SNDR 1kHz-BW 2^nd-Order VCO-Based ExG-to-Digital Front-End Using a Multiphase Gated-Inverted Ring-Oscillator Quantizer

Cited by 16 publications

References 3 publications

Methodology for Readout and Ring Oscillator Optimization Toward Energy-Efficient VCO-Based ADCs

Methodology for Readout and Ring Oscillator Optimization Toward Energy-Efficient VCO-Based ADCs

A 103-dB SFDR Calibration-Free Oversampled SAR ADC With Mismatch Error Shaping and Pre-Comparison Techniques

A 124 dB dynamic range sigma-delta modulator applied to non-invasive EEG acquisition using chopper-modulated input-scaling-down technique

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28.4 A 400mVpp 92.3 dB-SNDR 1kHz-BW 2nd-Order VCO-Based ExG-to-Digital Front-End Using a Multiphase Gated-Inverted Ring-Oscillator Quantizer

Cited by 16 publications

References 3 publications

Methodology for Readout and Ring Oscillator Optimization Toward Energy-Efficient VCO-Based ADCs

Methodology for Readout and Ring Oscillator Optimization Toward Energy-Efficient VCO-Based ADCs

A 103-dB SFDR Calibration-Free Oversampled SAR ADC With Mismatch Error Shaping and Pre-Comparison Techniques

A 124 dB dynamic range sigma-delta modulator applied to non-invasive EEG acquisition using chopper-modulated input-scaling-down technique

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Product

Resources

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28.4 A 400mV_pp 92.3 dB-SNDR 1kHz-BW 2^nd-Order VCO-Based ExG-to-Digital Front-End Using a Multiphase Gated-Inverted Ring-Oscillator Quantizer