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

Kilinc, Enver G.; Atasoy, Oğuz; Dehollain, Catherine; Maloberti, Franco

doi:10.1109/prime.2011.5966208

Cited by 7 publications

(4 citation statements)

References 6 publications

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“…Most of the power is lost during the wireless power transfer due to weak coupling between the coils. Therefore, the remote powering link should be optimized to achieve an efficient power transfer [13]. The remote powering link is optimized and the power is transferred over the inductive link is composed of 80x80 mm 2 powering and 12x12 mm 2 implanted coils.…”

Section: Measurement Resultsmentioning

confidence: 99%

Short-range remote powering for long-term implanted sensor systems in freely moving small animals

2013

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The paper presents comparison of different power sources for implantable biomedical systems. It is shown that near field wireless power transfer is a suitable technique for shortrange remote powering compared to other options. The required 2.8 mW is received wirelessly via an optimized inductive link driven by an efficient class-E power amplifier at 13.56 MHz from a 3 cm distance with 21% power efficiency including drain efficiency of power amplifier. An integrated rectifier and voltage regulator generate 1.8 V supply voltage from received AC signal. The integrated powering circuits are fabricated in a 0.18 um CMOS technology. The implantable micro-system weighs 1.05 g and the overall size is 12x12x2.3 mm 3 . Measurement results show the capability of the implantable system in freely moving small animals.

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Section: Measurement Resultsmentioning

confidence: 99%

Short-range remote powering for long-term implanted sensor systems in freely moving small animals

2013

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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%

“…Due to the weak coupling between the powering and the implant coils, the reflected impedance of the implanted side to the external side is low [20]. Therefore, is dominated by the series resistance of the powering coil at the operation frequency .…”

Section: Electronics Of Remote Poweringmentioning

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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“…In addition, the data is received by a custom designed receiver at the external side. In order to calibrate the sensors and establish the measurement, some commands are transmitted together with power at the cost of a limited reduction of power efficiency [10]. The commands are received by an Amplitude Shift Keying (ASK) demodulator.…”

Section: B Data Communicationmentioning

confidence: 99%

Short range remote powering of implanted electronics for freely moving animals

Kilinc

Ghanad

Maloberti

et al. 2013

2013 IEEE 11th International New Circuits and Systems Conference (NEWCAS)

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An implantable system for monitoring vital parameters via bio-sensors inside freely moving laboratory animals and its powering system are presented. The required 2 mW are harvested by the magnetic coupling with an external coil placed under the living space of the animal. The servo X-Y rails move the external coil and track the animal. Dynamic power-adaptation keeps the harvested power level constant against misalignments of transmitting coil and moving animal. Entire system and basic blocks integrated using a 0.18 um CMOS technology are presented. Experimental results show the effectiveness of the powering system.

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

Cited by 7 publications

References 6 publications

Short-range remote powering for long-term implanted sensor systems in freely moving small animals

Short-range remote powering for long-term implanted sensor systems in freely moving small animals

A Remotely Powered Implantable Biomedical System With Location Detector

Short range remote powering of implanted electronics for freely moving animals

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