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M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 51
Theory of Operation: Functional Block Diagrams
Physio
Functional Block
Diagram
Figure 4-3 shows how the Physio module functions, its internal connections, and connections to
other components.
Figure 4-3 Physio Module Block Diagram
Power
isolation
Signal
isolation
ECG leads
Differential
amp
and
driver
Isolated front end
Bandpass
filter
0.35 to 30Hz
islout
X216
Phy1 offset
and
gain adjust
Phy2 offset
and
gain adjust
AUX In
M
U
X
R-wave
detector
Clock
divider
A/D
converter
phy2
phy1
phy1
EZ-USB
controller
spi-do
dacdata
auxsel
spi-di
spi-ck
nadccs
clk24
r-raw
dacdata
nlddac1
nlddac2
USB
R-wave trig
To PC motherboard
To APIO