An ultra-low power ring oscillator for passive UHF RFID transponders

Farzeen, Suzana; Ren, Guoyan; Chen, Chunhong

doi:10.1109/mwscas.2010.5548887

Cited by 23 publications

(10 citation statements)

References 8 publications

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“…A good baseline for comparing the power dissipation of various oscillators is to calculate the power figures for ultra-low power ring oscillators, which are used in, for example RFID transponders [59] [35]. The voltage-controlled oscillator described in [35] consumes 24 nW at 5.24 MHz, that is E diss = 4.7 × 10 −15 J per oscillation cycle. With vanadium oxide relaxation oscillator one can go to an order of magnitude better: [60] projects 0.5µ W at 1.6 GHz, giving E diss ≈ 10 −16 J per cycle/ Spin torque oscillators are current-driven devices and typically run at sub-millamperes current and at GHz frequency -their voltage (and the dissipated power) depends on how low the resistance of the stack can be mode.…”

Section: Power Considerationsmentioning

confidence: 99%

Perspectives of using spin waves for computing and signal processing

2017

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It is an intriguing concept to use oscillators as fundamental building blocks of electronic computers. The idea is not new, but is currently subject to intense research as a part of the quest for 'beyond Moore' electronic devices. In this paper we give an engineering-minded survey of oscillator-based computing architectures, with the goal of understanding their promise and limitations for next-generation computing. We will mostly discuss non-Boolean, neurally-inspired computing concepts and put the emphasis on hardware and on circuits where the oscillators are realized from emerging, nanoscale building blocks. Despite all the promise that oscillatory computing holds, existing literature gives very few clear-cut arguments about the possible benefits of using oscillators in place of other analog nonlinear circuit elements. In this survey we will argue for finding the rationale of using oscillatory building blocks and call for benchmarking studies that compare oscillatory computing circuits to level-based (analog) implementations.

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Section: Power Considerationsmentioning

confidence: 99%

Perspectives of using spin waves for computing and signal processing

2017

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“…The main difference between an FS-Backscatter tag and an RFID tag is that FS-Backscatter requires a higher speed local clock for shifting the incident carrier signal. To achieve this, we leverage ring oscillators designs [14,40,43] and tune the circuit to enable 20MHz oscillating frequency while only consuming ∼20µW of power.…”

Section: Related Workmentioning

confidence: 99%

Enabling Practical Backscatter Communication for On-body Sensors

Zhang

Rostami

et al. 2016

Proceedings of the 2016 ACM SIGCOMM Conference

264

127

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In this paper, we look at making backscatter practical for ultra-low power on-body sensors by leveraging radios on existing smartphones and wearables (e.g. WiFi and Bluetooth). The difficulty lies in the fact that in order to extract the weak backscattered signal, the system needs to deal with self interference from the wireless carrier (WiFi or Bluetooth) without relying on built-in capability to cancel or reject the carrier interference.Frequency-shifted backscatter (or FS-Backscatter) is based on a novel idea -the backscatter tag shifts the carrier signal to an adjacent non-overlapping frequency band (i.e. adjacent WiFi or Bluetooth band) and isolates the spectrum of the backscattered signal from the spectrum of the primary signal to enable more robust decoding. We show that this enables communication of up to 4.8 meters using commercial WiFi and Bluetooth radios as the carrier generator and receiver. We also show that we can support a range of bitrates using packet-level and bit-level decoding methods. We build on this idea and show that we can also leverage multiple radios typically present on mobile and wearable devices to construct multi-carrier or multi-receiver scenarios to improve robustness. Finally, we also address the problem of designing an ultra-low power tag that can frequency shift by 20MHz while consuming tens of micro-watts. Our results show that FS-Backscatter is practical in typical mobile and static on-body sensing scenarios while only using commodity radios and antennas.

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“…Self-sustaining oscillators abound in nature and in engineered systems -examples include mechanical clocks [1], electronic ring [2][3][4] and LC oscillators [5], spin-torque oscillators [6][7][8][9][10], lasers [11][12][13], MEMS/NEMS-based oscillators [14,15], the heart's neuronal pacemakers [16], engineered molecular oscillators such as the repressilator [17], etc.. The defining characteristic of a self-sustaining oscillator is that it generates sustained "motion" without requiring any stimulus of a similar nature -i.e., it produces an output that changes with time indefinitely, usually in a periodic or quasi-periodic [18] fashion, in the absence of any input that changes with time.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we use CMOS ring and high-Q LC oscillators for illustration, but other nanoscale SSNOs such as spin-torque oscillators, NEMS-based oscillators, synthetic biological oscillators, etc., can also serve as substrates for SSNO-based phase logic 4. Ternary and multi-state logic values can also be encoded in phase; indeed, SSNOs can serve as multi-state latches[45].…”

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confidence: 99%

Boolean Computation Using Self-Sustaining Nonlinear Oscillators

Roychowdhury¹

2015

Proc. IEEE

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Self-sustaining nonlinear oscillators of practically any type can function as latches and registers if Boolean logic states are represented physically as the phase of oscillatory signals. Combinational operations on such phaseencoded logic signals can be implemented using arithmetic negation and addition followed by amplitude limiting. With these, general-purpose Boolean computation using a wide variety of natural and engineered oscillators becomes potentially possible. Such phase-encoded logic shows promise for energy efficient computing. It also has inherent noise immunity advantages over traditional level-based logic.

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An ultra-low power ring oscillator for passive UHF RFID transponders

Cited by 23 publications

References 8 publications

Perspectives of using spin waves for computing and signal processing

Perspectives of using spin waves for computing and signal processing

Enabling Practical Backscatter Communication for On-body Sensors

Boolean Computation Using Self-Sustaining Nonlinear Oscillators

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