GE b30, Technical Reference Manual

Page: 50 / 252

B30 Patient Monitor
1-36
Document no
.
2044677-001
In diagnostic mode the upper frequency is 150 Hz and it is limited by software.
4.4.5 STP board
Figure 20 STP board block diagram
Microprocessor unit
The CPU is a 16 bit H8/3052 single-chip microcomputer. It contains 128 kbytes of flash
memory and 4 kbytes of RAM. The clock frequency is 16 MHz.
High speed I/O is used to obtain a pulse control sequence necessary for pulse oximetry
measurement. Timing for the clock is from the oscillator.
S
T
P
_br
d_b
lc
k_dg
rm
.v
sd
PATIENT AND SpO2 PROBE
SpO2 TRUNK CABLE
SpO2 CONNECTOR
A/D CONVERSION
STP CPU
STP BLOCK DIAGRAM
PATIENT AND TEMPERATURE SENSOR
TEMPERATURE CONNECTOR
PATIENT AND INVASIVE CANNULA OR
CATHETER
FLUSHING KIT & INVASIVE PRESSURE
SENSOR WITH DOME
INV.PRESSURE CONNECTOR
INPUT PROTECTION CIRCUITRY
SpO2 PROBE RECOGNITION & LED
DRIVE SELECTION MATRIX
TEMPERATURE
MEASUREMENT
AMPLIFIER
SpO2
AMPLIFIER
SpO2 LED
DRIVE
SENSOR SIGNAL
CURRENT
SOURCE
SENSOR SIGNAL
VOLTAGE
SOURCE
INV: PRESSURE
MEASURE MENT
AMPLIFIER
RS 485
COMMUNICATION
POWER SUPPLY
NV
MEMORY
ISOLATION ISOLATION
MODULE BUS CONNECTOR