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BHARATHIYAR COLLEGE OF ENGINEERING AND TECHNOLOGYKARAIKAL

DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGGPROJECT REVIEW

Enhancing Power Conversion Efficiency of Active Rectifiers for Implantable Biomedical DevicesPROJECT MEMBERS

M.MOHANRAJUA.PRITHIVIRAJI.RAGAVENDRANJ.SELVA MANIPowerpoint TemplatesPage #Enhancing Power Conversion Efficiency of Active Rectifiers for Implantable Biomedical DevicesTo design and implement 13.56MHz RF front end hardware using active rectifiers, BPSK/FSK techniques and clock-data recovery for contactless energy transfer to increase power conversion efficiency in implantable biomedical devices

To realize performance comparison in order to make it relevant for suitable applications

To simulate the behavior model of the proposed circuit, using SIMPLIS software

Powerpoint TemplatesPage #Implantable Micro-electronic DevicesInductively powered systems in general consist of three main components Reader, Inductive link, and Transponder

Powerpoint TemplatesPage #Existing SolutionsUsing Diodes Or Diode-connected Transistors induce large forward voltage drops and power dissipation sensitive to process variations unable to provide high PCESchottky Diodes high leakage current need extra fabrication steps

Current-mode Amplitude-shift Keying (ASK) Demodulator comprises the complicated circuitry

Common FSK Demodulation Techniques require analog filtering down the signal path, which consumes a larger chip area in the low-frequency end of RF applications

Digital-mode FSK Demodulator requires the high-speed clock frequency in the design, the power and ground bounces will be increased

Powerpoint TemplatesPage #Proposed FSK demodulatorThe proposed analog FSK demodulator consists of a modified CMOS three stage rectifier, a voltage regulator, a data-recovery circuit, a multiplexer (MUX), a clock generator, and a PLL. The proposed FSK demodulator can reduce the power and ground bounces because it does not require HF operation.Achieving higher PCE is very important in inductively powered applications because it allows IMDs to operate with smaller received power from a larger distance. Lower received power also reduces the risk of tissue damage from overheating

Powerpoint TemplatesPage #Proposed BPSK DemodulatorThe RF front-end circuit is attractive for implantable biomedical devices because it can remotely receive coupling power and data, thereby reducing the size of implanted units and the risk for infectionTo recover the transmitted data, a low-power 13.56-MHz RF front-end circuit is proposed, which includes a full-wave bridge rectifier with a proposed leakage reduction technique to achieve an efficient transformation of the RF signal into DC voltage.a linear regulator with low quiescent current and unconditional stabilitya clock data recovery circuit with clock data separator techniquea BPSK demodulator

Powerpoint TemplatesPage #BPSK / FSK implementation

Powerpoint TemplatesPage #Active Rectifier Analysis

Powerpoint TemplatesPage #Parameters of Performance ComparisonDemodulation typeDemodulator supply voltageData rate power consumptionEnergy efficiencyFigure of meritCarrier frequencyInput voltage range Output voltageLoading resistancePower conversion efficiency

Powerpoint TemplatesPage #REFERENCESShuenn-Yuh Lee, Member, IEEE, Jia-Hua Hong, Cheng-Han Hsieh, Ming-Chun Liang, and Jing-Yang Kung A Low-Power 13.56 MHz RF Front-End Circuit for Implantable Biomedical Devices - IEEE Transactions on Biomedical Circuits and Systems, Vol. 7, No. 3, June 2013

Yuh-Shyan Hwang, Member, IEEE, Bo-Han Hwang, Ho-Cheng Lin, and Jiann-Jong Chen, Member, IEEE PLL-Based Contactless Energy Transfer Analog FSK Demodulator Using High-Efficiency Rectifier IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 60, NO. 1, JANUARY 2013

Hyung-Min Lee, StudentMember, IEEE, and Maysam Ghovanloo, Senior Member, IEEE A High Frequency Active Voltage Doubler in Standard CMOS Using Offset-Controlled Comparators for Inductive Power Transmission IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS, VOL. 7, NO. 3, JUNE 2013

Powerpoint TemplatesPage #Thank You!

Powerpoint TemplatesPage #