Pulse Oximeters measure oxygenation levels in patients by noninvasively or continuously monitoring oxygen saturation in arterial blood. Most Pulse oximetry systems use a transmissive optical technique, featuring a clip with optical electronics attached to a finger, toe, or ear. Light is transmitted through the skin on one side of the clip and received on the other, using LED’s and a photodiode.
Pulse Oximeter Block Diagram
MCU
Photo Diode
LCD Display
RED
LED
IR
LED
LED Driver
Voltage
Reference
Voltage
Monitor
Mux
Touch-Screen
Controller
USB
Interface
Data
Storage
User
Interface
Memory
Battery
Charger
Battery
Protection
Fuel
Gauge
Boost
Converter
LDO
Buck
Converter
Instrumentation Amplifier
Speaker
AC / DC
Adapter
Battery
Battery Management
Power Management
System Monitoring
Sensor
This design is for reference only. The design, as well as the products suggested, has not been tested for compatibility or interoperability.
Application Notes and Resources
