Rf Id Bioengineering 2

8/11/2019 Rf Id Bioengineering 2

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Neuromuscular

Stimulator,

G. Loeb, USC

Power

M2A Endoscopy

Capsule, Given Imaging

Neural Recording Probe,

R. Bashirullah, UFSize

Multichannel Microsystem

for Neural Recording,

A. Sodagar, U. Michigan

Functionality and

Performance

Cochlear Chip Scale Packaging,

P. Seligman, Cochlear, Ltd.

Figure 1.Parameterization of various biomedical hardware approaches in terms of size, power and functionality.


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0 0 0 0

InductiveLink

ReverseData In

VDropout

VReg

VReg

ForwardData Out

ReverseData Out

EnvelopeDetector

EnvelopeDetector

ReflectedImpedance

Class-EControl

Regulator

Back

Telemetry

110 0 0 011

CurrentSense

Figure 2.Basic inductive link components and architecture for wireless power anddata transfer.

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Carrier

Sync Bits

Carrier

Sync Bits

Sideband

Sync Bits

Data Data

Data

Buffer

Buffer

PA

Antenna Antenna

Antenna

LO

(900 MHz,

2.4 GHz)

LO

(900 MHz,

2.4 GHz)

Backscatter900 MHz,

2.4 GHzLO

(110 MHz)

(b)

(c)

(a)

Figure 3.Simplified block diagrams of data transmissionstrategies for biomedical devices.

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Memory

TelemetryCircuit

Physiologic

Sensor

Battery PowerManagement

System

ProgrammableLogic, Timing

Cotrol,and TherapyAlgorithms

A/DConverters

andDetectors

Sensingand

FilteringAmplifiers

ElectrodeConfig

Switches

High-VoltageOutput Pulse

GeneratorHigh VoltageMultiplier

Monitoring,MeasuringSystem and

ADC

Voltageand CurrentReferanceGenerators

Pulse Generator

Pacing Leads

Left Atrium

Right Atrium

Left Ventricle

Right Ventricle

ulse

Paci

Left

Left


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Interconnect Cable

Subcutaneous Cable

Power Receiver,Data Receiver,Microstimulator

External Transmitter

Camera in theEye Glass

Power

Transmitter

Power Recovery

VoltageRegulators

ElectrodeStatus

ReverseTelemetry

Clock Recovery

SignalProcessing

and

Computation

Data Receiver

Electrodes

Power Control

Reverse TelemetryDetection

External ControlUnit and

Startup Circuitry

Data Transmitter

Data Link

Power Link

Output

Drivers

Power

ransm er

Power Recovery

VoltageRegulators

ElectrodeStatus

ReversTelemetry

Clock Recovery

SignalProcessing

and

Computation

Data Receiver

Electrode

Power Control

everse e emetryDetection

External ControlUnit and

Startup Circuitry

Data Transmitter

a a n

Power Link

utput

Drivers

(a)

(b)


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Power Receiving Coil(Au)on Polyimide with CeramicFerrite Backing

Integrated CircuitwithNeural Amplifiers, SignalProcessing, and RFTelemetry Electronics

SMD Capacitor(0402 Package)1.2 mm

400-m Pitch

Utah Microelectrode Array

Bulk Micromachined Siliconwith Platinum Tips and GlassIsolation Between Shanks 2 mm

(a) (b)

Figure 8.Conceptual diagrams of neural microsystems for brain computer interfaces: (a) two-dimensional and three-dimensional arrays of cortically implanted electrodes with ribbon cables connecting them to a subcutaneous electronics [41]and (b) neural interface (INI) assembly concept with Utah Microelectrode Array [42].

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(a) (b)

Figure 9.Ingestible capsules: (a) an electronic pill for medication

adherence monitoring [48] (reprinted with permission), and(b) Given Ima in M2A endoscopic capsule [53].

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TABLE IV

SENSITIVITY TOINSULATORTHICKNESS FOR I MPLANTATIONS AT

LOCATIONS(1 ) AN D (3 )

Location (1): Sub-dermal Chest Implant

# layers 6 m Maximum distance (cm)plastic insulator skin to scanner

M C Q O1 3.5 4.5 3 22 4.5 7.5 5 3.53 5.5 8 6 5

Location (3): Cerebral Implant

# layers 6 m Maximum distance (cm)plastic insulator skin to scanner

M C Q O

1 3 6 5 42 4 6.5 6 4.53 5.5 7.5 6 7


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Fig. 2. Block diagram of the FSK demodulator.

TABLE II

MEASUREDRESULTS ANDSPECIFICATIONS OFFSK DEMODULATORCIRCUITS

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Fig. 1. Schematic diagram of the reader system under consideration for passive chipless RFID sensor tags.


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TABLE ITYPICALSGTIN-96 EPC DATASTRUCTURE

TABLE IIPARTITIONING OF THESERIALNUMBERFIELD

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Fig. 4. Microstrip triangular antenna with an ethylene sensor fabricated as loadto the antenna [22].

Fig. 5. Output from theanalog reader section when thepassive RFID sensortagis exposed to different concentrations of ethylene gas. The solid line representsthe linear fit to the displayed measured data points. At each concentration, thedisplayed data points are for measurements conducted on different days.

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Fig. 7. (a) Prototype of microstrip triangular antenna and meandered transmis-sion lines ID circuit for 3- bit code (110) generation. (b) (Sensor) capacitor in-tegrated at the end of the transmission line.

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Fig. 6. Schematic illustration of code generation using reflected pulses, in PPMrepresentation.


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Rf Id Bioengineering 2

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