38
NM20216A-F
3
Diagrams
Figure 3.2
. Block diagram of the electronics.
SQUID
electronics
System
controller
Data acquisition
and control unit
(Real-time
computers)
…
Patient
Control
Bus
Acquisition
workstation
Analysis
workstation
Stimulus
triggers in/out
(Fiber-optic
link)
Liquid
Helium
level display
3D
digitizer
SQUID
Preamplifier
306 channels
Feedthrough
filter
Feedthrough
filter
Feedthrough
filter
EEG
electronics
EEG
Preamplifier
Feedthrough
filter & opto-
isolation
LHe/HPI
Control Unit
SQUID
Sensor
EEG
Electrode
Liquid
Helium probe
SQUID
Preamplifier
Bus
Bus
Bus
Bus
Bus
Bus
EEG
Preamplifier
EEG
Electrode
…
64 channels
Bus
Bus
Bus
Bus
SQUID
electronics
EEG
electronics
SQUID
Sensor
…
306 channels
…
64 channels
Feedthrough
filter & opto-
isolation
Control
Bus
Fiber-optic link
E-net
E-net
E-net
E-net
E-net
E-net
E-net
Head position
indicator
coils (5)
Feedthrough
filter
HPI
driver
E-net
Fiber-optic link
Feedthrough
filter