A 7 x 7 x 2 mm³ 8.6-μW 500-kb/s Transmitter With Robust Injection-Locking-Based Frequency-to-Amplitude Conversion Receiver Targeting for Implantable Applications

Xiong, Bo; Li, Yida; Thean, Aaron; Heng, Chun-Huat

doi:10.1109/jssc.2019.2961855

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…For studies on the injection locking range f L , see [30], which is outside the scope of this paper. It is worth noting that during the injection locking state, the output amplitude ''A'' of the oscillator is inversely related to the injection frequency f inj , satisfying [31]…”

Section: B Fsk-ask Conversion With Ilros and Shifted Limitersmentioning

confidence: 99%

“…where A 0 is the output amplitude of the oscillator on the free operation and K is a constant, determined by the load charge and discharge. Unlike exploiting the difference in RO output envelope characteristics between the injection-locked and injection-pulled states in [29] and [31], we take advantage of the constant envelope characteristics in the injection-locked range to achieve FSK-ASK conversion. Therefore, our design makes the injection frequencies f inj all lie within the injection-locked range.…”

Section: B Fsk-ask Conversion With Ilros and Shifted Limitersmentioning

confidence: 99%

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Simultaneous High-Efficiency Power Delivery and Energy-Efficient Forward Data Transmission Over Single Inductive Link

et al. 2023

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This paper presents a system for simultaneous wireless power and data transfer (SWPDT) over a single inductive link. We design the frequency-splitting inductive link to address the trade-off between high power transfer efficiency (PTE) and high data rate (DR). An active rectifier is designed for high power conversion efficiency. Forward data communication is based on frequency-shift keying (FSK) modulation to support high DR transmission while delivering uninterrupted power. Moreover, we proposed low-power FSK demodulation circuits to further improve the energy efficiency of the data demodulation. The system is implemented with 180nm CMOS process and occupies an area of 0.836mm 2 . The post-layout simulation results show that the overall PTE (including the resonant tanks and the active rectifier) of the SWPDT system can be up to 76.5% while delivering 40mW power to the load. Meanwhile, a data rate of 1.11Mbps can be achieved. The power consumption for data demodulation is 69.1µW, showing an energy efficiency of 62.2pJ/bit. The proposed SWPDT system based on a single inductive link shows potential for implantable biomedical applications.INDEX TERMS Simultaneous wireless power and data transfer (SWPDT), frequency splitting, energy efficient, active rectifier, injection lock, shifted limiter.

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Section: B Fsk-ask Conversion With Ilros and Shifted Limitersmentioning

confidence: 99%

Section: B Fsk-ask Conversion With Ilros and Shifted Limitersmentioning

confidence: 99%