CONCEPTS COMPARISON BASED ON THE SPECIFICATIONS
Design Concept 1
Stelin
Proposed By
Electrode
Design
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Target
● QUA
Filter
Amplifier
Mi-co
ADC design
Portability
Cost
dry cell electrode
silver/silver chloride (Ag/AgCl)
Model: corvidien/Kendall H124SG
1" (24mm)
Range: 20 to 40 mv
Freq: 20 to 250 hz
DRICEPS (two electrodes parallel to it)
1. Low pass filter
● Type : Butterworth
● Freq : 5 to 20hz
2. High pass filter
● Type: second-order type
● Freq: 200hz to 1khz
● Type: instrumental amplifier
● Cut off: 10hz to 1khz
● CMRR:90 db
● Gain: 1 to 10000
● Model: arm cortex 32 bit M3
architecture
Successive Approximation (SAR)
ADC
● Emg device to smart phone( via
Bluetooth)
● Smart phone to clinician( internet,
via cloud)
● Projected cost estimate : >£100
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Design Concept 2
Sobia
Design Concept 3
Kelvin
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Silver Chloride (AgCl)
Gold Electrodes
Conductive Polymer Electrodes
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Pre-gelled Electrode.
Multi-polar Configuration (Pre-Amped)
AgCl (Silver Chloride)
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Vastus Lateralis
LPF
HPF
Notch Filter
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Rectus Femoris
Band Filter
LPF- 500Hz, HPF- 20Hz
Notch Filter
Rejection frequency: 50Hz
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Model: INA 122
Gain: 1:10k
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Instrument Amplifier
Model : (INA114)(Gain 1:10k)(30mW)
Model :( LF351)(102mW),
(OPAA211)(180mW)
NI PCI 6143
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Model: PIC18F452
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AD215 (Analog to Digital Supply)
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Data signals through cables (Samtech
RG178)
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Model: ADC ADS7813
Analog to Digital
Data signal to Bluetooth
Open signal source App
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Cost Estimation : >$70
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Total Cost Estimate: > €90
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Final Design Proposed
Op-Amp
Target
Rectus
Femoris
Electrode
Pre-Gelled Electrode
AgCl (Silver Chloride)
Instrument Amplifier
Model : (INA114)(Gain
1:10k)(30mW)
Model :( LF351)(102mW),
(OPAA211)(180mW)
Process & Output
To detect Anomaly in
muscle activity to monitor
progress after ligament
injury rehabilitation.
Assess the output in terms
of recovery progression
and
technique/exercise
improvisation.
Band Pass Filter
ADC & MICO
Successive Approximation (SAR)
Mico - NI PCI 6143
1. Low pass filter
● Type : 2nd order BW
● Freq : 5 to 20hz
2. High pass filter
 Type : 2nd order BW
 Freq : 500 to 650hz
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