Theory Of Operations; Functional Block Diagram - GE TruSat Technical Reference Manual

2. THEORY OF OPERATIONS

2.1 Functional block diagram

Analog
Sensor
front end
AUX A/D
converter
LED drive
LED timing
Line power supply
This chapter contains:
• Functional block diagram.
• SpO , pulse rate, and PI r measurement principles.
2
• Functional descriptions of the power supply, System board, Display board, and
the Trend Download board (RS-232).
A/D
converter
Data & Clocks
CPLD
power supply
VDD
Voltage
regulators
Battery charger
Speaker
driver
Backlight
AC & alarm LEDs
alarm switches
Figure 2-1. Functional block diagram
Digital Data & status info
isolators
Isolated
Clock
Watchdog Backlight
micro supply
Display board connector
ON/OFF & Display
drivers
DSP
V-CORE
regulator
Microprocessor
ComWheel
Trend Download
Alarm
Keys
Display control
4.2 V regulator
LCD
Code & data
memory
board
2–1