XPC Control TargetA/D Converter

P10021

4051 MUX

Internal Clock

Counter4051

DEMUX

Counter

Ground

15V Out/In

In/Out

4051 MUX

Internal Clock

Counter

4051 DEMUXCounter

Out/In

In/Out

Ground

15V

Motor Controller

Motor Controller

Voltage Regulator5, 12, 15, GroundVoltage Regulator5, 12, 15, Ground

2 Sum. Op-Amplifiers4 Diff. Op-Amplifiers2 Sum. Op-Amplifiers4 Diff. Op-Amplifiers

PWM Generator(4 Amplifiers)

PWM Generator(4 Amplifiers)

LVAD

13 Pins of DV 15

Current pumps on the market use a cable about the size of a coaxial line

Available CablesAvailable Cables

HeartAssist 5™ Pediatric VADBerlin Heart: INCOR PumpCable: Silicone

Concept Selection: Signal Transmission System

A B C D

MICS400 - 405 MHz

Bluetooth2.4 GHz OFDM Over One Wire 2 Multiplexed Wires

Selection Criteria Weight Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd

Inter-group compatibility 2 2   4 2   4 2   4.00 3   6.00

Interference5 3

Reserved Medical Band 15 1

Unlicensed 2.4GHz Band 5 3

Orthogonal Signals 15.00 3   15.00

Size2 4 3x5x10 mm 8 3 6x6x1 mm 6 1

Requires multiple parts 2.00 1

Requires multiple parts 2.00

Data Rate3 2 800kbps 6 3 3 Mbps 9 4

500kbps plus wire transfer 12.00 3

Wire Transfer 9.00

Power3 4 -16dBm 12 1 -6 to 4 dBm 3 2   6.00 3   9.00

Wire number reduction5 4 2 wires 20 4 2 wires 20 3 3 wires 15.00 1 4 wires 5.00

Availability of Parts5 1 24-lead? 5 4 Widely 20 2

Requires multiple parts 10.00 4

Requires multiple parts 20.00

Scope of Project falls within rigorous time line 6 1

Difficult test platform 6 2

Difficult test platform 12 2

Unfamiliar topic 12.00 4   24.00

Reliability8 2

Possible loss of signal 16 1

Attenuation of frequency 8 4

Partially wired for control 32.00 4

Wired connection 32.00

Security6 2

Wireless Hacking 12 1 Blue Jacking 6 4 Wired Signal 24.00 4 Wired Signal 24.00

Low probability of error

7 1

Signals sent in separate

packets 7 1

Signals sent in separate

packets 7 3

Signals sent on

orthogonal channels 21.00 4

Less signal processing 28.00

  Total Score   104.00     93.00     132.00     146.00  

4 currents

3 currents

8 signals

Motor

Pump

Interior Electronics

(Proposed)

72 bits

Differential/Summing Amps6 Total

12-bit A/D6 Total

Transmitter 6 signalsHESA

Hall Effect Sensor Array

2 Total

AMBActive Magnetic Bearing

2 Total

5V

12V

15V

72 bits

5 bits

Wireless Signal Transmission (INT)

Receiver

Motor Controller

PWMAmps

4 Total

FPGAFor Signal Processing

Clock

Motor Control Signal

PWM Control Signals(4 or 8)

Miniaturization Project

ControlXPc

Target

Exterior Electronics(Proposed)

Receiver

Transmitter

72 bits72 bits

5 bits

Wireless Signal Transmission (EXT)

6 signals

FPGAFor Signal Processing

Clock

5 bits

Requires 2 Wires• 15 V Line• Ground Line

Benefits• Eliminates all signal wiresCons• 300kHz channels require data in packets• Higher bit error rate• Limited products available

4 currents

3 currents

8 signals

Motor

Pump

Interior Electronics

(Proposed)

72 bits

Differential/Summing Amps6 Total

12-bit A/D6 Total

USB Transceiver

6 signalsHESA

Hall Effect Sensor Array

2 Total

AMBActive Magnetic Bearing

2 Total

5V

12V

15V

Multi-Channel Single Wire Signal (INT)

Motor Controller

PWMAmps

4 Total

1 signal

4 signals

72 bits

5 bits

5 bits

1-bit Registers

Miniaturization Project

ControlXPc

Target

Exterior Electronics(Proposed)

USB Transceiver

72 bits

Multi-Channel Single Wire Signal (EXT)

5 bits

Requires 3 Wires• 15 V Line• Ground Line• 1 Signal Wire

Benefits• Allows for wider bandwidth• Decrease probability of error• More control of channelCons•Data rate may be too fast

72 bits

5 bits

Concept Selection - Materials

    Titanium Silicone UHMWPE Polyurethane

Selection Criteria Weight Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd Rating Notes Wtd

Ease of Fabrication 7 5Machine

Block35 8

Room Temp. Cast

or Overcoating

56 5Machine

Block35 5 Unknown 35

FDA Approved for Similar Applications

8 10Abiocor control case

80 2 Many 16 5Prosthetic

s40 7

Abiocor pump

56

Availability 5 7Off-the-

shelf35 5

Special order

25 9Off-the-

shelf45 3

Angioflex, trademarke

d15

High Thermal Conductance

3 7 15 W/m-K 21 3 0.3 W/m-K 9 3 0.5 W/m-K 9 3Assumed < 1W/m-K

9

Low Wireless Interference

2 0   0 9   18 5   10 5   10

Low Weight 6 3 4.4 g/cc 18 9 1 g/cc 54 9 0.9 g/cc 54 9 1.2 g/cc 54

High Durability 10 10No

corrosion100 10 Inert 100 7 Inert 70 7 Inert 70

Total Score   289     278     263     249  

Rank   1     2     3     4  

8 currents

3 currents

8 signals

Motor

PumpInterior Electronics

(Proposed)

HESAHall Effect

Sensor Array2 Total

AMBActive Magnetic Bearing

2 Total

5V

12V

15V

Wire- “Less” Proposal (INT)

3-bit CounterClock

1:5 MultiplexerWired Signal

6:1 MultiplexerWired Signal Motor

Controller

PWMAmps4 Total

Differential/Summing Amps6 Total

WiredSignal

4 PWM Control Signals

1 RelaySignal

Miniaturization Project

ControlXPc

Target

Exterior Electronics(Proposed)

1:6 Multiplexer

Wire- “Less” Proposal (EXT)

Clock3-bit Counter

5:1 Multiplexer

Counter

Requires 4 Wires• 15 V Line• Ground Line• 2 Signal Wire•(1 Clock sync wire)

WiredSignal

6 positionsignals

Benefits• Cost Effective• Wired signal more reliable than wirelessCons• Signal only available fraction of time• Will require synchronization commands with project 10021