TECHNICAL SPECIFICATION FOR ELECTROCORTICOGRAPHY
No. / Features / Required Specification / Critical(C) / Compiled
(Yes/No) / Quoted Specification
Make / g.USBamp and specified
Model / GWL (K060803 specified)
Country of Origin / Utah, United States
Country of Manufacture / Utah, United States
General
01 / Type / Electrocorticography analyzer based on the personal computer with flexible electrode composition with signal transmitted through g.USBamp for analysis of epileptiform activities / C
02 / Typical time for an investigation / 40 min
03 / Investigating time period / 1 – 2 weeks
04 / Temporal resolution / 5 ms
05 / Spatial resolution / 1 cm
Electrode:
06 / Composition / Sixteen sterile, stainless steel, carbon tip, platinum or gold ball
07 / Configuration of overlying frame connection / Crown or Halo
08 / Spacing / 1 cm / C
09 / Diameter / 5 mm / C
10 / Placement (by) / On balls and socket joints
11 / Placement (on) / Outside the Dura mater (epidural) and under the Dura mater (subdural)
12 / Dimensions / 4 to 256 electrode contacts
13 / Typical grid configuration / 8 x 8
Depth electrode:
14 / Radius coverage / 0.5 – 3 mm / C
15 / Sampling rate / Less than 10 kHz
16 / With 10 kHz or more, radius coverage / 0.05 – 0.35 mm / C
Software:
17 / Operating system / Linux, Mac OS X, Win All, BSD, Solaris
18 / Program category / Matlab or specified
19 / Digital signal processing / 22-bit ADC software controlled photo and audio simulators
Data acquirer:
20 / Acquirer type / g.USBamp / C
21 / Features / Amplification/digitization
22 / Signal range / 0.1 – 5.0 V
23 / Amplifier sampling frequency / 512 Hz / C
24 / High pass filter / 0.02 – 0.1 Hz
25 / Notch filter / 60 Hz
26 / Low pass filter / 40 – 100 Hz
27 / Digitizer frequency / 112 Hz
28 / Amplifier input impedance / >100 Megohm
29 / CMRR / >100 dB
30 / A/D conversion / 24 bits
31 / Power / USB port
Workstation (Monitor):
32 / Distance to the subject / 60 cm
33 / Subtend to the horizontal and vertical visual field / ±7.10
34 / Flash rate / 16 Hz
35 / Intensity contrast – flash : non flash / 3 : 1
36 / Inter stimulus period / 1/64 – 3/64 s
Power:
37 / Power requirement / 220 ± 10% V
38 / Circuit supply / 1.2 V
39 / CMOS / 130 nm
40 / AC rejection filter / 50/60 Hz
Certification:
41 / ECoG based BCI / US7120486 B2
42 / Safety standard compliance / FDA-approved, IEC 60601-1, IEC 60601-1-2, IEC 60601-2-26
Warranty and Maintenance:
43 / Period and coverage / Estimated as 5 years onsite warranty
44 / Maintenance / Year wise