A low-power, high-resolution, 1 GHz differential comparator with low-offset and low-kickback

Aldacher, Muhammad; Nasrollahpour, Mehdi; Hamedi-Hagh, Sotoudeh

doi:10.1109/icecs.2017.8292027

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…36,37 Therefore, it is very important to design an extremely low offset comparator for the SoC sensor array. In order to reduce input referred voltage (noise) in comparator circuits, it often to design digitally time-sequence switch and very complex techniques to overcome the kickback noise and input offset voltage [38][39][40][41][42] in comparator, and assisted with calibration scheme. [43][44][45] The input referred offset variation due to the capacitive path from ion sensing to the input stage circuit in SoC can degrade the overall performance of the system, for example, the input referred offset voltage shifts the background reference voltage levels in ADC, and result in the erroneous conversion process.…”

Section: Ph Sensing Principle and The Proposed Dual Offset Cancelation In Double Tail Comparatormentioning

confidence: 99%

Design of 150‐μV input‐referred voltage 1‐GHz comparison frequency dual offset cancelation comparator for pH biomarker system‐on‐chip

Lin

Chang

Liao

2021

Circuit Theory & Apps

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The highlight of in vivo or ex vivo measurement to monitor the pH value from blood or saliva is emerging in these years since changes in pH suggest that hidden diseases are about to occur. In this paper, we design and implement a SoC for pH measurement, and a dual offset cancelation technique in comparator featured with 150-uV input referred voltage and 1-GHz comparison bandwidth is verified. The SoC by utilizing proposed dual offset cancelation technique can sense 8 femto farad capacitance change in the deionized water, 12 femto farad change in the glucose liquid, and 14 femto farad in the 0.5% hydrochloric acid.The SoC for pH measurement is not only used to detect pH change in blood or saliva, but can also extend to wearable device to monitor human's biomarkers such as pH and Na+ in sweat to prevent the disease in advance.

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Section: Ph Sensing Principle and The Proposed Dual Offset Cancelation In Double Tail Comparatormentioning

confidence: 99%

Design of 150‐μV input‐referred voltage 1‐GHz comparison frequency dual offset cancelation comparator for pH biomarker system‐on‐chip

Lin

Chang

Liao

2021

Circuit Theory & Apps

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“…The resistor R3 (only loaded by parasitic of the slicer) is used to pass AC signal to slicer while reducing the kick-back noise of slicer to the previous stages. To further suppress kickback noise, a two-stage dynamic comparator with pre-amp stage similar to [6] is used to further reduce the kickback.…”

Section: Low-kickback Self-comparing Slicermentioning

confidence: 99%

A compact and low-power wireless receiver for implanted medical backscatter

Huo

Mao

Xie

et al. 2019

IEICE Electron. Express

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A compact and low-power wireless receiver supporting 2.4 GHz industrial, scientific and medical (ISM) band is implemented in a 130 nm Complementary Metal-Oxide-Semiconductor (CMOS) process. The GHz operating frequency renders the chip to be matched with a mm-sized antenna to reduce implants' size and improve patients' experience. To simplify the implanted chip, the downlink is through On-Off Keying (OOK) so non-coherent detection and simplified receiver chain can be deployed. Boosted Rectifier and open-loop amplifier-based receiver chain lowers the chip's power consumption to nW level. The measured sensitivity reaches −50 dBm at a Bit Error Rate (BER) of 1e-3.

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Highly-matched sub-ADC cells for pipeline analogue-to-digital converters

Kazeminia

Mahdavi²

2019

International Journal of Electronics

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A low-power, high-resolution, 1 GHz differential comparator with low-offset and low-kickback

Cited by 6 publications

References 13 publications

Design of 150‐μV input‐referred voltage 1‐GHz comparison frequency dual offset cancelation comparator for pH biomarker system‐on‐chip

Design of 150‐μV input‐referred voltage 1‐GHz comparison frequency dual offset cancelation comparator for pH biomarker system‐on‐chip

A compact and low-power wireless receiver for implanted medical backscatter

Highly-matched sub-ADC cells for pipeline analogue-to-digital converters

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