A 15nW per Button Noise-Immune Readout IC for Capacitive Touch Sensor

Said Hussaini; Hui Jiang; Paul Walsh; Dermot MacSweeney; Kofi A.A. Makinwa

doi:10.1109/ESSCIRC.2018.8494283

A 15nW per Button Noise-Immune Readout IC for Capacitive Touch Sensor

Said Hussaini, Hui Jiang, Paul Walsh, Dermot MacSweeney, Kofi A.A. Makinwa

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

1 Citation (Scopus)

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Abstract

This paper presents a readout IC that uses an asynchronous charge-redistribution-based capacitance-to-digital-converter (CDC) to digitize the capacitance of a touch sensor. Thanks to the power efficient tracking algorithm, the CDC consumes negligible power consumption in the absence of touch events. To facilitate stand-alone or wake-on-touch applications, the CDC can be periodically triggered by a co-integrated ultra-low power relaxation oscillator. At a 38 Hz scan-rate, the readout IC consumes 15 nW per touch sensor, which is the lowest reported to date.

Original language	English
Title of host publication	ESSCIRC 2018 - IEEE 44th European Solid State Circuits Conference
Place of Publication	Piscataway, NJ
Publisher	IEEE
Pages	78-81
Number of pages	4
ISBN (Electronic)	978-153865404-0
DOIs	https://doi.org/10.1109/ESSCIRC.2018.8494283
Publication status	Published - 2018
Event	ESSCIRC 2018: 44th IEEE European Solid State Circuits Conference - Dresden, Germany Duration: 3 Sept 2018 → 6 Sept 2018 Conference number: 44

Conference

Conference	ESSCIRC 2018
Country/Territory	Germany
City	Dresden
Period	3/09/18 → 6/09/18

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

Asynchronous tracking logic
CDC
Stand-alone touch sensor
Ultra-low power oscillator

Access to Document

10.1109/ESSCIRC.2018.8494283

08494283Final published version, 1.37 MB

Cite this

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title = "A 15nW per Button Noise-Immune Readout IC for Capacitive Touch Sensor",

abstract = "This paper presents a readout IC that uses an asynchronous charge-redistribution-based capacitance-to-digital-converter (CDC) to digitize the capacitance of a touch sensor. Thanks to the power efficient tracking algorithm, the CDC consumes negligible power consumption in the absence of touch events. To facilitate stand-alone or wake-on-touch applications, the CDC can be periodically triggered by a co-integrated ultra-low power relaxation oscillator. At a 38 Hz scan-rate, the readout IC consumes 15 nW per touch sensor, which is the lowest reported to date.",

keywords = "Asynchronous tracking logic, CDC, Stand-alone touch sensor, Ultra-low power oscillator",

author = "Said Hussaini and Hui Jiang and Paul Walsh and Dermot MacSweeney and Makinwa, {Kofi A.A.}",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. ; ESSCIRC 2018 : 44th IEEE European Solid State Circuits Conference ; Conference date: 03-09-2018 Through 06-09-2018",

year = "2018",

doi = "10.1109/ESSCIRC.2018.8494283",

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pages = "78--81",

booktitle = "ESSCIRC 2018 - IEEE 44th European Solid State Circuits Conference",

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AU - Jiang, Hui

AU - Walsh, Paul

AU - MacSweeney, Dermot

AU - Makinwa, Kofi A.A.

N1 - Conference code: 44

PY - 2018

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N2 - This paper presents a readout IC that uses an asynchronous charge-redistribution-based capacitance-to-digital-converter (CDC) to digitize the capacitance of a touch sensor. Thanks to the power efficient tracking algorithm, the CDC consumes negligible power consumption in the absence of touch events. To facilitate stand-alone or wake-on-touch applications, the CDC can be periodically triggered by a co-integrated ultra-low power relaxation oscillator. At a 38 Hz scan-rate, the readout IC consumes 15 nW per touch sensor, which is the lowest reported to date.

AB - This paper presents a readout IC that uses an asynchronous charge-redistribution-based capacitance-to-digital-converter (CDC) to digitize the capacitance of a touch sensor. Thanks to the power efficient tracking algorithm, the CDC consumes negligible power consumption in the absence of touch events. To facilitate stand-alone or wake-on-touch applications, the CDC can be periodically triggered by a co-integrated ultra-low power relaxation oscillator. At a 38 Hz scan-rate, the readout IC consumes 15 nW per touch sensor, which is the lowest reported to date.

KW - Asynchronous tracking logic

KW - CDC

KW - Stand-alone touch sensor

KW - Ultra-low power oscillator

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DO - 10.1109/ESSCIRC.2018.8494283

M3 - Conference contribution

AN - SCOPUS:85056751579

SP - 78

EP - 81

BT - ESSCIRC 2018 - IEEE 44th European Solid State Circuits Conference

PB - IEEE

CY - Piscataway, NJ

T2 - ESSCIRC 2018

Y2 - 3 September 2018 through 6 September 2018

ER -

A 15nW per Button Noise-Immune Readout IC for Capacitive Touch Sensor

Abstract

Conference

Bibliographical note

Keywords

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