A 400μW-RX, 1.6mW-TX superregenerative transceiver for wireless sensor networks

Otis, Brian; Chee, Y.H.; Rabaey, Jan M.

doi:10.1109/isscc.2005.1494036

Cited by 141 publications

(130 citation statements)

References 4 publications

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“…The sensor node consists of an analog-to-digital converter (ADC) that samples sensor data, a DSP core, and an RF transceiver. For low duty cycles, average power for this system (estimated from the literature [2,3,4]) can be under 5 μW.…”

Section: * N Guilar Is Supported By a Gaann Fellowshipmentioning

confidence: 99%

Integrated Solar Energy Harvesting and Storage

Guilar

Kleeburg

Chen

et al. 2009

IEEE Trans. VLSI Syst.

117

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To explore integrated solar energy harvesting as a power source for low power systems such as wireless sensor nodes, an array of energy scavenging photodiodes based on a passive-pixel architecture for imagers and have been fabricated together with storage capacitors implemented using on-chip interconnect in a 0.35 μm CMOS logic process. Integrated vertical plate capacitors enable dense energy storage without limiting optical efficiency. Measurements show 225 μW/mm 2 output power generated by a light intensity of 20k LUX.

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Section: * N Guilar Is Supported By a Gaann Fellowshipmentioning

confidence: 99%

Integrated Solar Energy Harvesting and Storage

Guilar

Kleeburg

Chen

et al. 2009

IEEE Trans. VLSI Syst.

117

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“…The WUR solutions are based on variety of different receiver architectures [7]: matched filter [11], radio frequency envelope detection (RFED) [12][13][14][15][16][17][18][19][20][21], uncertain intermediate frequency (U-IF) [22,23], sub-sampling [24,25], superregenerative oscillator (SRO) [8,9,26], and injection locking [27−29]. The design involves many tradeoffs; therefore, it is not straightforward to define, which architecture is best suited for a WUR.…”

Section: Related Work Of Wake-up Receiversmentioning

confidence: 99%

“…For example, the architecture based on the superregenerative principle is known to provide good sensitivity at a cost of energy consumption. For instance, in [8], sensitivity of −100.5 dBm is achieved at the bit error rate (BER) of 10…”

Section: Introductionmentioning

confidence: 99%

On the human body communications: wake-up receiver design and channel characterization

Petäjäjärvi

Mikhaylov

Vuohtoniemi

et al. 2016

J Wireless Com Network

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By modulating the electric field induced to a human body, it is possible to transfer data wirelessly using the body as a transmission medium. This method is referred to as human body communication (HBC), which has multiple advantages in comparison with the traditional radio frequency (RF) communication. First, it alleviates the traffic load from the radio channels, which are becoming more and more congested, as the number of connected wireless devices increases rapidly. Second, HBC can potentially provide higher security than traditional RF communication since the electric field stays in the vicinity of a human body, which makes eavesdropping more challenging. Third, the attenuation in the HBC frequency band is lower than in bands used by the other radio technologies for wireless body area networks. To improve energy efficiency in HBC, one approach is to utilize a wake-up receiver (WUR). The WUR is continuously listening for a pre-defined wake-up signal, which activates the other electric circuitry (e.g., sensing, processing, and communication). The use of WURs can significantly reduce the energy consumption and increase the lifetime of the sensing applications. In this work, we propose a superregenerative WUR solution which employs self-quenching and loose synchronization method and operating at sufficiently low (1.25 kbps) data rate in order to obtain high sensitivity while keeping the energy consumption low. This enables to achieve sensitivity of −97 dBm for 10 −3 bit error rate while consuming only 40 μW. The details of the design and the performance evaluation results of the proposed solution are in the paper. Also, the paper reports the results of the practical measurements characterizing the impact of the electrode location on the path loss in an HBC channel. The presented results show that the proposed system can potentially enable communication between two any points on the body with low transmit power.

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“…they operate with low duty cycles). Additionally, they tolerate low supply voltages (Chen et al, 2007;Otis et al, 2005), and therefore are excellent candidates for battery-operated systems.…”

Section: The Principle Of Superregenerationmentioning

confidence: 99%

“…Thus, SR receivers are a promising alternative to other architectures in emerging applications such as wireless sensor networks and medical devices (Ayers et al, 2010, Bohorquez et al, 2009Otis et al, 2005). Recent proposals for their use include: reception of spread spectrum, phase and frequency modulations (Ayers et al 2010, Moncunill et al, 2005bPalà et al, 2009); use of stable frequency references such as bulk-acoustic-wave (BAW) resonators (Otis et al, 2005); implementation of digital self-calibrating techniques (Chen et al, 2007); and, very recently, reception of ultra wideband impulse radio (UWB IR) modulations (Anis et al, 2008;Moncunill et al, 2007b;Moncunill et al, 2009;Pelissier et al, 2009;Thoppay, 2010).…”

Section: Introductionmentioning

confidence: 99%