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Electric Circuit Diagrams
5 - 15
2. ECG AMP block
The following is a block diagram of ECG AMP.
ECG signals input from patient connectors go through the input protection
section and enter the first-stage amplifier (differential amplifier), where
each signal for right arm, left arm, and chest 1 to chest 6 undergoes
differential amplification with a signal for left leg.
Each of the output of the first-stage amplifier is input to the second-stage
amplifier, signals are then switched sequentially with the multiplexer, and
converted to digital signals with the A/D converter.
The digitized ECG signals are then transferred to the CPU with the FPGA.
The ECG AMP block is electrically isolated by a photocoupler and an
isolation power supply.
ADC
CPLD
Photo-
coupler
Pulse
trans-
former
Power
voltage
Generating
section
Patient
connector
Multi-
plexer
First-stage amplifier
Second-stage amplifier
R
L
C1
C2
C3
C4
C5
C6
F
RF
Содержание FCP-7101
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