FEATURES
General Description
Most modern speakerphones use half-duplex operation, which alternates transmission between the far-end talker and the speakerphone user. This is done to ensure stability because the acoustic coupling between the speaker and microphone is much higher in speaker phones than in handsets where the coupling is mechanically suppressed.
Features
Single-chip,full-duplex,hands-free operation
Optional Tx Noise Guard
Programmable attenuation during double-talk
Optional 34 dB microphone preamplifier
Dual channel AGC’ed volume controls with mute
Dual integrated 80 dB IDR codecs
Speech-trained Network and Acoustic Echo Cancellers
Rx and Tx supplementary echo suppression
Configurable half-duplex training mode
Powerdown mode
Microcontroller Interface
Cirrus Logic is a leader in high performance, low-power ICs for audio and voice signal processing applications. Cirrus Logic’s products span the entire audio signal chain, from capture to playback, providing innovative products for the world’s top smartphones, tablets, digital headsets, wearables and emerging smart home applications.