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Analog eLAB ™

Bluetooth Headset

Audio CODEC Amplifier Boost DC/DC ESD Protection Li-ION Charger DC/DC Converter

Bluetooth Headset

A Bluetooth headset is a wireless headset. It implements Bluetooth technology to provide 2.45GHz-radio wireless connectivity for audio communication.

The core subsystems include:

  • RF Front-End - includes RF filter, balun (line matching), and RF transceiver (Modulator/Demodulator/ADC/DAC). The RF front-end provides the wireless link through the antenna.
     
  • Baseband DSP/Microcontroller/Memory - the DSP processes physical layer protocols and audio data. The microcontroller runs the Bluetooth software stack stored in memory and controls the RF/host interfaces. The Bluetooth software and data are stored in ROM/RAM. Upgraded firmware may be loaded from FLASH memory.
     
  • Audio Codec - connected to microphone and earpiece to perform analog/digital conversions and bit stream coding/decoding to create audio radio.
     
  • Host Interface/Volume Control - host or user can use this serial interface to configure the processor, codec, or changes the volume.
     
  • Power Conversion - converts input battery power to run various functional blocks.
     
  • Battery Management - charges the battery using wall or USB voltage.