Monolithic digital galvanic isolation buffer fabricated in silicon on sapphire CMOS

Culurciello, Eugenio; Pouliquen, Philippe O.; Andreou, Andreas G.; Strohbehn, K.; Jaskulek, Steve

doi:10.1049/el:20050006

Cited by 15 publications

(4 citation statements)

References 7 publications

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“…The capacitive coupling enables electrical insulation between the ICs inside a chip. This condition makes CPT special for the projected sensitive instruments, which need to be decoupled from the noise [219]. Wireless capacitive power and data transfer are considered using bidirectional communication [218], using a subharmonic resonant system [217], and using multiple receivers [216].…”

Section: ) Integrated Circuitsmentioning

confidence: 99%

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

et al. 2022

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Capacitive power transfer (CPT) technology is becoming increasingly popular in various application areas. Due to its limitations, such as low frequency, low coupling capacitance, and the high voltage stress on metal plates, the studies on high power CPT applications fell behind previously. Therefore, the wideband gap (WBG) semiconductor devices and the compensation topologies are further adopted to tackle these limitations. The main purpose of the paper is to review CPT applications in terms of performance parameters, advantages, disadvantages and also challenges. Initially, the basic principles of CPT technology are examined, which cover compensation topologies, coupler structures, transfer distance, power electronic components, and system control methods. Then, CPT applications are evaluated for performance parameters (i.e., power level, operation frequency, system efficiency, transfer distance) along with compensation types, inverter types, and coupler types. The applications are categorized into six main groups according to industrial topics as safety, consumer electronics, transport, electric machines, biomedical, and miscellaneous. Herein, power level changes from µW to kW ranges, the operation frequency varies from 100s of kHz to 10s of MHz ranges as well. The maximum system efficiency is recorded as 97.1 %. The transfer distance varies from µm range to 100s of mm ranges. The full-bridge inverter topology and four-plate coupler structure are noticeable in CPT applications. Finally, advantages, disadvantages, and challenges of CPT applications are evaluated in detail. This review is expected to serve as a reference for researchers who study on CPT systems and their applications.INDEX TERMS Capacitive power transfer, capacitive coupling, wireless power transfer.MEHMET ZAHID EREL was born in Sakarya, Turkey. He received the B.S. degree in electrical engineering from the Yildiz Technical University, Istanbul, Turkey, in 2013, and the M.S. degree in electronics and communication engineering from the Ankara Yildirim Beyazit University, Ankara, Turkey, in 2016. He is currently pursuing the Ph.D. degree with the department of electrical and electronics engineering,

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Section: ) Integrated Circuitsmentioning

confidence: 99%

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

et al. 2022

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“…In addition, capacitive techniques are well-suited for high-speed data transfer due to their higher EMI. However, because of the fast ground shift (in hundreds of kV/µs) between the two circuit domains, capacitive techniques have lower common mode transient immunity (CMTI) [14][15][16]. This common mode current, which is proportional to the capacitor size, may corrupt data transfer and increase the bit error rate (BER).…”

Section: Introductionmentioning

confidence: 99%

A Fully Integrated 0.6 Gbps Data Communication System for Inductive-Based Digital Isolator with 0.8 ns Propagation Delay and 10−15 BER

et al. 2023

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Digital isolators are implemented to protect low-voltage electronics and ensure human safety during high-voltage surge events. In this work, we present the design of an inductive-based digital isolation system that can sustain up to 1 kVrms breakdown voltage. The proposed system is designed using the pulse polarity modulation scheme and fabricated in a 0.35 μm CMOS. Two identical dies are bounded within the IC package, with one die housing the transmitter (Tx) and the isolation transformer, while the other die contains the receiver (Rx). Two different customized designs between three metal layers are implemented to form the isolation element. The transformer’s secondary coil is constructed in metal-1, while the primary coil is formed in metal-2 and metal-3 for comparing the system functionality, isolation capability, and propagation delay. The functionality has been verified by measurements for an operating frequency of 300 MHz with a 2.6 ns propagation delay and an energy consumption of 8.15 × 103 pJ/bit at 1 Mbps. The chip was tested under extreme temperatures and achieved a maximum measured common mode transient immunity (CMTI) of 500 V/μs. Jitter has been examined to ensure fast transmission at a bit error rate (BER) of 10−15 with a total jitter (TJ) of 188.18 ps.

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“…No ground connection is necessary what avoids ground loops and reduces wiring complexity. Industry‐established applications include digital isolator integrated circuits (ICs) [1], isolated RS‐485 transmission systems [2] and the replacement of Ethernet magnetics [3]. Moreover, capacitive coupled signalling is proposed for IGBT drivers [4] and distributed battery management systems [5].…”

Section: Introductionmentioning

confidence: 99%

Active common‐mode filter for capacitive‐coupled isolated signalling

Angerer¹,

Schwanninger²,

März³

2020

Electron. lett.

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Capacitive coupling is a well-established principle in isolated signalling. A major challenge esp. in power electronics is common-mode transient immunity caused by the displacement currents at the coupling capacitors. Digital isolator integrated circuits (ICs) employ modulated signalling, the authors propose an active filter circuit to remove common-mode components from baseband signals. This allows for reliable data transmission during transients in power semiconductor control, AC-coupled RS-485 or transformer-less Ethernet. The filter structure is simple and consists of two current mirrors, one for positive transients, and one for the negative. A current on one differential signal line is 'mirrored' onto the other, common-mode currents are conducted to ground. Differential signals are minimally affected. The proposed filter is verified in simulation and experiment: baseband signalling with 50 Mbps in presence of 30 kV/ ms burst transients is achieved using discrete semiconductors. Even better results are expected when monolithically embedding the filter in an integrated circuit.

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Monolithic digital galvanic isolation buffer fabricated in silicon on sapphire CMOS

Cited by 15 publications

References 7 publications

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

A Fully Integrated 0.6 Gbps Data Communication System for Inductive-Based Digital Isolator with 0.8 ns Propagation Delay and 10−15 BER

Active common‐mode filter for capacitive‐coupled isolated signalling

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