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'Always listening' voice trigger SoC targets portable devices

Posted: 05 Oct 2015     Print Version  Bookmark and Share

Keywords:ON Semiconductor  voice trigger  SoC  smartphone  wearable 

p>ON Semiconductor has announced what it describes as an "always listening" voice trigger SoC solution geared for popular consumer electronics devices such as smartphones, tablets and wearable devices. The BelaSigna R281 used an audio pattern-matching algorithm developed by the company to detect a single, user-trained trigger phrase.

This phrase can be any series of sounds, and is neither speech nor language dependent. Upon recognising this trigger phrase, BelaSigna R281 will assert a wake-up signal which, when connected to a host controller, lessens the need for users to touch their device to wake it prior to use.

Based on ultra-low-power technology developed for the advanced hearing aid solutions, BelaSigna R281 has virtually no impact on standby battery life. Unlike some standalone solutions that are only compatible with digital microphones, BelaSigna R281's mixed-signal architecture works with both analogue and digital microphone signals. The device provides a configurable, regulated microphone supply to facilitate simple integration. Other key features of BelaSigna R281 include an I2C interface for configuration and control, a configurable GPIO wake-up signal and an internal oscillator.

BelaSigna R281 is available in a 5mm x 5mm QFN32 package and will soon also be available in an ultra-miniature 2.42mm x 2.74mm WLCSP. Both packages can be designed onto a single-sided PCB with 4 mil routing and a minimal amount of external components.

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