24.5 A 4.5nW wake-up radio with −69dBm sensitivity

Jiang, Haowei; Wang, Po-Han Peter; Gao, Li; Sen, Pinar; Kim, Young-Han; Rebeiz, Gabriel M.; Hall, Drew A.; Mercier, Patrick P.

doi:10.1109/isscc.2017.7870438

Cited by 40 publications

(19 citation statements)

References 1 publication

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“…In addition, this figure also shows the best reported fullyintegrated RF wake-on-radio circuits (triangles): Jiang'17 [6], Robert'16 [7], Zgaren'15 [8], Oh'13 [9], and Cho'08 [10]. The highest wake-up sensitivity is achieved in [6], with a combination of an integrated transformer and a powered voltage amplifier, with a quiescent power of 4.5 nW.…”

Section: Comparison With State Of the Art And Conclusionmentioning

confidence: 96%

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A 10 nW, 10 mV signal detector using a 2 pA standby voltage reference, for always-on sensors and receivers

Adami

Yang

Zhang

et al. 2018

2018 IEEE Applied Power Electronics Conference and Exposition (APEC)

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An RF energy harvesting circuit is usually designed to maximise efficiency and therefore output power, while a passive wake-up radio is usually optimised for a high open-circuit output voltage resulting in high sensitivity. These two functions have conflicting design requirements, but are generally both needed in Internet-of-Things devices. This paper presents a new approach to holding almost the entire system fully powered down whilst listening, whilst also obtaining an effective wake-up and energy harvesting circuit using the same rectenna (rectifying antenna). The topology uses a rectenna that is optimised for efficiency, and two signal detector circuits that draw up to 3.5 nA from the battery. One detector is configured to trigger at 85 mV, to start up the boost converter when enough power is available to obtain netpositive energy harvesting. The other detector is set to be more sensitive, to wake up subsystems when the rectenna output reaches 10 mV. The detector architecture and transistor-level design are presented, and the detection threshold and power levels experimentally verified. The circuit draws 10 nW at a sensitivity of 10 mV, and 3.9 nW at 85 mV. This detection system is the first reported circuit with a configurable detection threshold that draws only nW from the battery, and that, in addition to RF signals, can be used with any transient signals, such as outputs from piezoelectric sensors, microphones, or energy harvesters that produce in excess of around 10 mV. The low power consumption of this circuit is largely due to use of the UB20M voltage detector, whose internal on-demand voltage reference generator is also reported here. It has the lowest reported standby current of 2 pA, and a sub-microsecond-scale turn-on response time.

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Section: Comparison With State Of the Art And Conclusionmentioning

confidence: 96%

“…14 (dots). [6], Robert'16 [7], Zgaren'15 [8], Oh'13 [9], Oh'12 [3], Cho'08 [10]) and a commercial low-power comparator (LTC1540).…”

Section: Comparison With State Of the Art And Conclusionmentioning

confidence: 99%

A 10 nW, 10 mV signal detector using a 2 pA standby voltage reference, for always-on sensors and receivers

Adami

Yang

Zhang

et al. 2018

2018 IEEE Applied Power Electronics Conference and Exposition (APEC)

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show abstract

“…It consumes 164µW with a 2-dimensional wake-up scheme. Several other designs achieve sub-µW consumption but inconveniently dictate the use of custom On-Off keying (OOK) transmitters in order to wake up the sleeping nodes [3][4].…”

Section: Introductionmentioning

confidence: 99%

A −80dBm BLE-compliant, FSK wake-up receiver with system and within-bit dutycycling for scalable power and latency

Abdelhamid

Paidimarri

Chandrakasan

2018

2018 IEEE Custom Integrated Circuits Conference (CICC)

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“…Some active WuRx are existing, but requiring to demodulate some information in order to identify the ap-propriate radio interface to wake up, therefore inducing a higher energy consumption [4], [5], [6]. Another particular technique was proposed and experimentally validated by the authors in [7], [8].…”

Section: Introductionmentioning

confidence: 99%

On the use of the FBMC modulation to increase the performance of a wake-up radio

Huţu

Villemaud

2018

2018 IEEE Radio and Wireless Symposium (RWS)

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In this paper, Filter Bank Multi Carrier (FBMC) signals are employed in order to improve the performance of a quasi-passive wake-up radio receiver (WuRx) for which the addressing is performed by the means of a frequency fingerprint. The feasibility of such kind of WuRx was already demonstrated by using orthogonal frequencydivision multiplexing (OFDM) signals to form the identifiers. Together with the main advantage of this approach (i.e. no base band processing needed and consequently a reduced energy consumption), one of the drawbacks is their low sensitivity. Through a set of circuit-system co-simulations, it is shown that by their characteristics, especially high Peak to Average Power Ratio (PAPR) and high out of band attenuation, FBMC signals manage to boost the sensitivity and moreover to enhance the robustness of this kind of WuRx.

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24.5 A 4.5nW wake-up radio with −69dBm sensitivity

Cited by 40 publications

References 1 publication

A 10 nW, 10 mV signal detector using a 2 pA standby voltage reference, for always-on sensors and receivers

A 10 nW, 10 mV signal detector using a 2 pA standby voltage reference, for always-on sensors and receivers

A −80dBm BLE-compliant, FSK wake-up receiver with system and within-bit dutycycling for scalable power and latency

On the use of the FBMC modulation to increase the performance of a wake-up radio

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