GE TuffSat

Overview
1-5
Circuit board
The circuit board contains all the circuitry for the TuffSat oximeter. The functions
performed by this board are illustrated below.
Figure 1-4. Circuit board block diagram
Power on/off
control
(reset control)
Infrared (IR)
wireless
transmitter
Keys
Ambient light
detection
Backlight LED
Processor
Code memory
and
Data memory
Watchdog
timer
Alphanumeric
LCD and LCD
driver
Sensor LED
drive
Sensor
Analog
front end
Timing
Analog
Signal Path
A/D converter
Power supply