TMS Amplifier

Advisor - Robert Bouda Client - High Speed System Engineering Lab Faculty Advisor - Mani Mina

Our Website: http://dec1406.ece.iastate.edu/

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Team Dec14-06

Josh Abbott (Team Leader) Kaiyue Zheng(Web Master)

Spencer Ulven (Communicator) Zhongheng Wang(Idea Holder)Dec 14-06

TMS Overview

• Transcranial Magnetic Stimulation

• Support for deep brain stimulation

● Research for Post Traumatic Stress Disorder, Alzheimer's, Chronic Pain, Parkinson’s, etc.

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Problem Statement

• TMS has little support for deep brain stimulation

• No low cost alternative options for research development in TMS

• Current designs lack enhanced control, reliability, and pulse shaping

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Goal

Create an Amplifier Control Circuit that will allow researchers to explore deep brain TMS to provide solutions for difficult brain conditions

Previous Design

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Project Scope

• Produce 1000A output for a minimum of 400µs

• Provide mono-phasic and bi-phasic pulse waveforms

• Allow flexibility for user control

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Circuit Concepts

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Block Diagram Circuit

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Design Process

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Implementation

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● Simulations were done by using NI Multisim

● Simulations for each part of the circuit❖ Power supply❖ IGBTs❖ Arduino Control❖ Capacitor Bank Charge and

Discharge

● Simulation for entire circuit

Simulation

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Simulation

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PCB Boards

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Non-Conductive Enclosure

Y: 10 inchX: 20 inchZ: 3 inchZ2: 7 inch

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MD● Biological Risks due to

electromagnetic radiation.

Hardware● Accidental discharge into

operator● Circuit overheating

Risks

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Hardware:● LED caution ● Enclosure (Non-

Conductive)● Cooling fans● Fuse ● Current limiter● Discharge button (on case)

Safety Software:

• GUI Control Discharge

• System Idle Discharge

• Close GUI Discharge

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• Functionality and performance of the system were introduced and demonstrated

• New circuit posses several characteristics for TMS application o Controllable pulseo Pulse widtho Interchangeable polarityo Flexible capability and control due to Arduino

• Provides platform for enhancing similar application in the future

Conclusion

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Special Thanks:Advisor: Robert BoudaFaculty Advisor: Dr.Mani Mina

QUESTIONS?Please visit our website at:http://dec1406.ece.iastate.edu/

Thank You

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Appendix

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Appendix

Schedule of Design

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Appendix

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