Featured Medical Applications - Digital Stethoscope
Basic digital stethoscopes retain the look and feel of acoustic stethoscopes
but improve listening performance. High-end digital stethoscopes offer sophisticated
capabilities, such as audio recording and playback, and provide data to visually chart results by connecting to
an off-instrument display. This advanced functionality increases the physician’s diagnostic capability. The
essential elements of a digital stethoscope are the sound transducer, the audio codec electronics, and the
speakers. The sound trans-ducer is the most critical piece in the chain. It determines the diagnostic quality of
the digital stethoscope.
Digital Stethoscope Block Diagram
MCU
Switching
Regulator
LCD Display
Linear
Regulator
Battery
Protection
Fuel
Gauge
Battery
Charger
USB
Interface
Voltage
Reference
Voltage
Supervisor
Line
Protection
Audio Codec
Data
Storage
Audio Jack
USB Port
AC / DC
Adapter
Battery
Battery Management
Power Management
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