A 95µW 24MHz digitally controlled crystal oscillator for IoT applications with 36nJ start-up energy and >13× start-up time reduction using a fully-autonomous dynamically-adjusted load

Ming Ding; Yao Hong Liu; Yan Zhang; Chuang Lu; Peng Zhang; Benjamin Busze; Christian Bachmann; Kathleen Philips

doi:10.1109/ISSCC.2017.7870275

A 95µW 24MHz digitally controlled crystal oscillator for IoT applications with 36nJ start-up energy and >13× start-up time reduction using a fully-autonomous dynamically-adjusted load

Ming Ding, Yao Hong Liu, Yan Zhang, Chuang Lu, Peng Zhang, Benjamin Busze, Christian Bachmann, Kathleen Philips

Signal Processing Systems

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

20 Citations (Scopus)

Abstract

Wireless sensor nodes (WSN) in IoT applications (e.g., Bluetooth Low Energy, BLE) rely on heavily duty-cycling the wireless transceivers to reduce the overall system power consumption [1]. This requires swift start-up behavior of the transceiver. The crystal oscillator (XO) generates a stable reference clock for the PLL to synthesize a carrier and to derive clocks for all other parts of the transceiver SoC, e.g., ADC and the digital baseband. The typical start-up time (T_s) of an XO is relatively long (∼ms) due to a high quality factor of the crystal quartz. This leads to a significant (up to 30%) power overhead for a highly duty-cycled transceiver with a short packet format, e.g., the packet length is as short as 128μs in BLE (Fig. 5.3.1). A reduction of T_s of the XO is necessary, at the same time, the power overhead to enable a fast start-up should be minimized in order to reduce the overall energy consumption (Fig. 5.3.1).

Original language	English
Title of host publication	2017 IEEE International Solid-State Circuits Conference, ISSCC 2017
Editors	Laura C. Fujino
Place of Publication	Piscataway
Publisher	Institute of Electrical and Electronics Engineers
Pages	90-91
Number of pages	3
ISBN (Electronic)	9781509037575
DOIs	https://doi.org/10.1109/ISSCC.2017.7870275
Publication status	Published - 2 Mar 2017
Event	64th IEEE International Solid-State Circuits Conference, ISSCC 2017 - San Francisco, United States Duration: 5 Feb 2017 → 9 Feb 2017 Conference number: 64

Conference

Conference	64th IEEE International Solid-State Circuits Conference, ISSCC 2017
Abbreviated title	ISSCC 2017
Country/Territory	United States
City	San Francisco
Period	5/02/17 → 9/02/17

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1109/ISSCC.2017.7870275

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Ding, M., Liu, Y. H., Zhang, Y., Lu, C., Zhang, P., Busze, B., Bachmann, C., & Philips, K. (2017). A 95µW 24MHz digitally controlled crystal oscillator for IoT applications with 36nJ start-up energy and >13× start-up time reduction using a fully-autonomous dynamically-adjusted load. In L. C. Fujino (Ed.), 2017 IEEE International Solid-State Circuits Conference, ISSCC 2017 (pp. 90-91). [7870275] Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/ISSCC.2017.7870275

Ding, Ming ; Liu, Yao Hong ; Zhang, Yan et al. / A 95µW 24MHz digitally controlled crystal oscillator for IoT applications with 36nJ start-up energy and >13× start-up time reduction using a fully-autonomous dynamically-adjusted load. 2017 IEEE International Solid-State Circuits Conference, ISSCC 2017. editor / Laura C. Fujino. Piscataway : Institute of Electrical and Electronics Engineers, 2017. pp. 90-91

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title = "A 95µW 24MHz digitally controlled crystal oscillator for IoT applications with 36nJ start-up energy and >13× start-up time reduction using a fully-autonomous dynamically-adjusted load",

abstract = "Wireless sensor nodes (WSN) in IoT applications (e.g., Bluetooth Low Energy, BLE) rely on heavily duty-cycling the wireless transceivers to reduce the overall system power consumption [1]. This requires swift start-up behavior of the transceiver. The crystal oscillator (XO) generates a stable reference clock for the PLL to synthesize a carrier and to derive clocks for all other parts of the transceiver SoC, e.g., ADC and the digital baseband. The typical start-up time (Ts) of an XO is relatively long (∼ms) due to a high quality factor of the crystal quartz. This leads to a significant (up to 30%) power overhead for a highly duty-cycled transceiver with a short packet format, e.g., the packet length is as short as 128μs in BLE (Fig. 5.3.1). A reduction of Ts of the XO is necessary, at the same time, the power overhead to enable a fast start-up should be minimized in order to reduce the overall energy consumption (Fig. 5.3.1).",

author = "Ming Ding and Liu, {Yao Hong} and Yan Zhang and Chuang Lu and Peng Zhang and Benjamin Busze and Christian Bachmann and Kathleen Philips",

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Ding, M, Liu, YH, Zhang, Y, Lu, C, Zhang, P, Busze, B, Bachmann, C & Philips, K 2017, A 95µW 24MHz digitally controlled crystal oscillator for IoT applications with 36nJ start-up energy and >13× start-up time reduction using a fully-autonomous dynamically-adjusted load. in LC Fujino (ed.), 2017 IEEE International Solid-State Circuits Conference, ISSCC 2017., 7870275, Institute of Electrical and Electronics Engineers, Piscataway, pp. 90-91, 64th IEEE International Solid-State Circuits Conference, ISSCC 2017, San Francisco, California, United States, 5/02/17. https://doi.org/10.1109/ISSCC.2017.7870275

A 95µW 24MHz digitally controlled crystal oscillator for IoT applications with 36nJ start-up energy and >13× start-up time reduction using a fully-autonomous dynamically-adjusted load. / Ding, Ming; Liu, Yao Hong; Zhang, Yan et al.

2017 IEEE International Solid-State Circuits Conference, ISSCC 2017. ed. / Laura C. Fujino. Piscataway : Institute of Electrical and Electronics Engineers, 2017. p. 90-91 7870275.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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AU - Ding, Ming

AU - Liu, Yao Hong

AU - Zhang, Yan

AU - Lu, Chuang

AU - Zhang, Peng

AU - Busze, Benjamin

AU - Bachmann, Christian

AU - Philips, Kathleen

N1 - Conference code: 64

PY - 2017/3/2

Y1 - 2017/3/2

N2 - Wireless sensor nodes (WSN) in IoT applications (e.g., Bluetooth Low Energy, BLE) rely on heavily duty-cycling the wireless transceivers to reduce the overall system power consumption [1]. This requires swift start-up behavior of the transceiver. The crystal oscillator (XO) generates a stable reference clock for the PLL to synthesize a carrier and to derive clocks for all other parts of the transceiver SoC, e.g., ADC and the digital baseband. The typical start-up time (Ts) of an XO is relatively long (∼ms) due to a high quality factor of the crystal quartz. This leads to a significant (up to 30%) power overhead for a highly duty-cycled transceiver with a short packet format, e.g., the packet length is as short as 128μs in BLE (Fig. 5.3.1). A reduction of Ts of the XO is necessary, at the same time, the power overhead to enable a fast start-up should be minimized in order to reduce the overall energy consumption (Fig. 5.3.1).

AB - Wireless sensor nodes (WSN) in IoT applications (e.g., Bluetooth Low Energy, BLE) rely on heavily duty-cycling the wireless transceivers to reduce the overall system power consumption [1]. This requires swift start-up behavior of the transceiver. The crystal oscillator (XO) generates a stable reference clock for the PLL to synthesize a carrier and to derive clocks for all other parts of the transceiver SoC, e.g., ADC and the digital baseband. The typical start-up time (Ts) of an XO is relatively long (∼ms) due to a high quality factor of the crystal quartz. This leads to a significant (up to 30%) power overhead for a highly duty-cycled transceiver with a short packet format, e.g., the packet length is as short as 128μs in BLE (Fig. 5.3.1). A reduction of Ts of the XO is necessary, at the same time, the power overhead to enable a fast start-up should be minimized in order to reduce the overall energy consumption (Fig. 5.3.1).

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M3 - Conference contribution

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BT - 2017 IEEE International Solid-State Circuits Conference, ISSCC 2017

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T2 - 64th IEEE International Solid-State Circuits Conference, ISSCC 2017

Y2 - 5 February 2017 through 9 February 2017

ER -

Ding M, Liu YH, Zhang Y, Lu C, Zhang P, Busze B et al. A 95µW 24MHz digitally controlled crystal oscillator for IoT applications with 36nJ start-up energy and >13× start-up time reduction using a fully-autonomous dynamically-adjusted load. In Fujino LC, editor, 2017 IEEE International Solid-State Circuits Conference, ISSCC 2017. Piscataway: Institute of Electrical and Electronics Engineers. 2017. p. 90-91. 7870275 doi: 10.1109/ISSCC.2017.7870275

A 95µW 24MHz digitally controlled crystal oscillator for IoT applications with 36nJ start-up energy and >13× start-up time reduction using a fully-autonomous dynamically-adjusted load

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