Self Tuning Inductive Powering For Implantable Telemetric Monitoring Systems

Schuylenbergh, Koenraad Van; Puers, Robert

doi:10.1109/sensor.1995.717082

Cited by 35 publications

(44 citation statements)

References 4 publications

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“…Similar results were also derived in [2,3], though the result in [2] is only applicable for reasonably large k. For completeness, the optimal efficiency given this result is shown here: …”

Section: Optimal Load Analysis For Maximum Power Transfer Efficiencysupporting

confidence: 74%

“…The RF output of the secondary-side matching network then passes through a rectifier, converting the AC energy into DC energy used to power the load, in this case modeled by resistor R L;DC . There are many excellent references that discuss the electromagnetic properties of such a system, as well as analytical formulae for predicting inductance and other parameters in more detail [2,3]. …”

Section: Overviewmentioning

confidence: 99%

“…Inductive coupling theory has been well-studied in the past, and many excellent references describe analytical expressions that can accurately predict the maximum achievable efficiency of a given link [2,3]. However, the analytical steps in previous work can, in some cases, be difficult to interpret correctly and apply to nonstandard situations.…”

Section: Reflected Load Analysismentioning

confidence: 99%

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Near-Field Wireless Power Transfer

Mercier

Chandrakasan

2015

Integrated Circuits and Systems

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Wireless power transfer links are becoming increasingly important for consumer, industrial, and medical electronic devices. There are two principal applications for wireless power transfer that require different optimization criteria: continuous power deliver (e.g., cochlear implant) and periodic charging (e.g., cellular phone). In the former case, optimizing power transfer efficiency is a metric of great importance, while in the latter case, minimizing charging time by maximizing power transfer is important. This chapter presents analytical equations that predict optimal conditions for both applications through first-principals step-bystep reflected load analysis. These equations are then used as the basis for the design of a rapid wireless ultra-capacitor charging circuit that speeds up time-to-charge by 3.7 .

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“…Similar results were also derived in [2,3], though the result in [2] is only applicable for reasonably large k. For completeness, the optimal efficiency given this result is shown here: …”

Section: Optimal Load Analysis For Maximum Power Transfer Efficiencysupporting

confidence: 74%

Section: Overviewmentioning

confidence: 99%

Section: Reflected Load Analysismentioning

confidence: 99%

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Near-Field Wireless Power Transfer

Mercier

Chandrakasan

2015

Integrated Circuits and Systems

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“…Assuming that the coils are tuned to the same frequency , the maximum power transmission efficiency for a certain load can be expressed by [19] (2) where and are the coupling coefficient, the quality factors of the unloaded powering coil and the unloaded implant coil, respectively. The maximum power efficiency can be obtained by maximizing not only the coupling factor, but also the quality factors of the coils [20], [21].…”

Section: Optimized Remote Powering Link For Implantable Systemmentioning

confidence: 99%

A Remotely Powered Implantable Biomedical System With Location Detector

Kilinc

Ghanad

Maloberti

et al. 2015

IEEE Trans. Biomed. Circuits Syst.

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Abstract-An universal remote powering and communication system is presented for the implantable medical devices. The system be interfaced with different sensors or actuators. A mobile external unit controls the operation of the implantable chip and reads the sensor's data. A locator system is proposed to align the mobile unit with the implant unit for the efficient magnetic power transfer. The location of the implant is detected with 6 mm resolution from the rectified voltage level at the implanted side. The rectified voltage level is fedback to the mobile unit to adjust the magnetic field strength and maximize the efficiency of the remote powering system. The sensor's data are transmitted by using a free running oscillator modulated with on-off key scheme. To tolerate large data carrier drifts, a custom designed receiver is implemented for the mobile unit. The circuits have been fabricated in 0.18 um CMOS technology. The remote powering link is optimized to deliver power at 13.56 MHz. On chip voltage regulator creates 1.8 V from a 0.9 V reference voltage to supply the sensor/actuator blocks. The implantable chip dissipates 595 W and requires 1.48 V for start up.Index Terms-CMOS analog circuit design, data communication, implantable biomedical system, implantable medical device, inductive link, integrated circuits, location detection, locator, power management, remote powering, wireless power transfer.

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“…Fig. 1 shows a magnetically coupled remote power link [1]. In these systems, there are two coils close to each other to increase the coupling factor.…”

Section: B Link Parameters (Q K F O )mentioning

confidence: 99%

FoM to compare the effect of ASK based communications on remotely powered systems

Kilinc

Atasoy

Dehollain

et al. 2011

2011 7th Conference on Ph.D. Research in Microelectronics and Electronics

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This paper presents a Figure-of-Merit to compare the remotely powered communication systems. The important parameters for remote powering and also communication are presented. The effect of ASK based communications on remote powering performance is analyzed by representing the challenges of power transfer during data transmission. This Figure-of-Merit is introduced to compare different modulation types in terms of powering and communication performances.

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Self Tuning Inductive Powering For Implantable Telemetric Monitoring Systems

Abstract: Inductive powering of implantable monitoring devices is a widely accepted solution to replace implanted batteries.

Cited by 35 publications

References 4 publications

Near-Field Wireless Power Transfer

Near-Field Wireless Power Transfer

A Remotely Powered Implantable Biomedical System With Location Detector

FoM to compare the effect of ASK based communications on remotely powered systems

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