An Energy-Autonomous Power-and-Data Telemetry Circuit With Digital-Assisted-PLL-Based BPSK Demodulator for Implantable Flexible Electronics Applications

Pan, Luominghao; Chen, Mingyi; Chen, Yifei; Zhu, Siyao; Liu, Yan

doi:10.1109/ojcas.2021.3119931

Cited by 6 publications

(4 citation statements)

References 31 publications

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“…This work mainly concerns the design of a US-Data Down-Link embedding the proposed fully digital BPSK demodulator. Indeed, the state-of-the-art presents several modulation schemes, such as the ASK [18,19], PWM-ASK [20], OOK [19,21,22], and OOK-PM [23,24], while the BPSK demodulation has often been used for RF-powered IMDs [25][26][27][28][29][30][31].…”

Section: Starvedmentioning

confidence: 99%

“…On the other hand, recent works have exploited digital architectures for BPSK demodulation [26,28,30,31]. Many schemes have adopted a 1-bit Analog-to-Digital Converter (ADC) implemented with Schmitt's Triggers, a clock-recovery circuit and D-Flip-Flops (DFFs) whose role is as frequency dividers or as counters.…”

Section: The Proposed Fully Digital Bpsk Demodulatormentioning

confidence: 99%

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A 28 nm Bulk CMOS Fully Digital BPSK Demodulator for US-Powered IMDs Downlink Communications

2022

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Low-invasive and battery-less implantable medical devices (IMDs) have been increasingly emerging in recent years. The developed solutions in the literature often concentrate on the Bidirectional Data-Link for long-term monitoring devices. Indeed, their ability to collect data and communicate them to the external world, namely Data Up-Link, has revealed a promising solution for bioelectronic medicine. Furthermore, the capacity to control organs such as the brain, nerves, heart-beat and gastrointestinal activities, made up through the manipulation of electrical transducers, could optimise therapeutic protocols and help patients’ pain relief. These kinds of stimulations come from the modulation of a powering signal generated from an externally placed unit coupled to the implanted receivers for power/data exchanging. The established communication is also defined as a Data Down-Link. In this framework, a new solution of the Binary Phase-Shift Keying (BPSK) demodulator is presented in this paper in order to design a robust, low-area, and low-power Down-Link for ultrasound (US)-powered IMDs. The implemented system is fully digital and PLL-free, thus reducing area occupation and making it fully synthesizable. Post-layout simulation results are reported using a 28 nm Bulk CMOS technology provided by TSMC. Using a 2 MHz carrier input signal and an implant depth of 1 cm, the data rate is up to 1.33 Mbit/s with a 50% duty cycle, while the minimum average power consumption is cut-down to 3.3 μW in the typical corner.

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Section: Starvedmentioning

confidence: 99%

Section: The Proposed Fully Digital Bpsk Demodulatormentioning

confidence: 99%

A 28 nm Bulk CMOS Fully Digital BPSK Demodulator for US-Powered IMDs Downlink Communications

2022

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“…In addition, due to the dependence of these methods on the carrier signal, the design of complex circuits to modulate the data on the transmitter (Tx) side leads to an increase in power consumption. On the other hand, increasing the data carrier frequency to achieve high bandwidth leads to complex and power‐consuming RF circuits in the IMDs, which is not desired 21 …”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, increasing the data carrier frequency to achieve high bandwidth leads to complex and power-consuming RF circuits in the IMDs, which is not desired. 21 Recently, to address these problems, several pulse-based data links have been proposed by substituting the carrier signal with a series of sharp and narrow pulses. 20,22,23 Their most popular method is pulse harmonic modulation (PHM), which was first introduced by Inanlou and Ghovanloo.…”

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confidence: 99%

An ultra‐low‐power CWM/SCM demodulator for inductive‐powered IMDs with the DRCF ratio of 50% and the powering index of 75%

Arand,

Abiri,

Salehi

2024

Circuit Theory & Apps

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SummaryIn this paper, an ultra‐low‐power and area‐efficient demodulator circuit for wireless downlink SCM/CWM modulation schemes is proposed. The proposed demodulator offers high performances and allows simultaneous power and downlink data transmission over a single 13.56‐MHz inductive link. The proposed method requires only two carrier cycles per data bit period, and also, a power index of 75% is obtained. Although the proposed demodulator can be applicable to other wireless systems, here, it is intended for implantable medical devices. To prove the performance of the proposed demodulator circuit, it has been designed and post‐layout simulations are provided using a standard 65‐nm CMOS technology and occupies 27 × 32 μm2 of active area. Post‐layout simulation results indicate that with a 1‐V power supply, the proposed circuit achieves an ultra‐low‐power consumption of 8.51 μW at a data rate of 6.78 Mb/s corresponding to an energy efficiency of 1.25 pJ/bit.

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A 70%-power transmission efficiency, 3.39 Mbps power and data telemetry over a single 13.56 MHz inductive link for biomedical implants

Chen

Pan

Lin

et al. 2022

Sci. China Inf. Sci.

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An Energy-Autonomous Power-and-Data Telemetry Circuit With Digital-Assisted-PLL-Based BPSK Demodulator for Implantable Flexible Electronics Applications

Cited by 6 publications

References 31 publications

A 28 nm Bulk CMOS Fully Digital BPSK Demodulator for US-Powered IMDs Downlink Communications

A 28 nm Bulk CMOS Fully Digital BPSK Demodulator for US-Powered IMDs Downlink Communications

An ultra‐low‐power CWM/SCM demodulator for inductive‐powered IMDs with the DRCF ratio of 50% and the powering index of 75%

A 70%-power transmission efficiency, 3.39 Mbps power and data telemetry over a single 13.56 MHz inductive link for biomedical implants

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