參數(shù)資料
型號： CDB6422
廠商： Cirrus Logic, Inc.
英文描述： Enhanced Full-Duplex Speakerphone IC
中文描述： 增強(qiáng)型全雙工擴(kuò)音器集成電路
文件頁數(shù)： 1/48頁
文件大?。?/td> 873K
代理商： CDB6422
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
(All Rights Reserved)
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
CS6422
Enhanced Full-duplex Speakerphone IC
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
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 sta-
bility because the acoustic coupling between the
speaker and microphone is much higher in speaker-
phones than in handsets where the coupling is
mechanically suppressed.
The CS6422 enables full-duplex conversation using
echo cancellation and suppression in a single-chip solu-
tion. The CS6422 can easily replace existing half-duplex
speakerphone ICs with a huge increase in conversation
quality.
The CS6422 consists of telephone & audio interfaces,
two codecs and an echo-cancelling DSP.
See
page 48
.
CS6422-IS
CDB6422
E
valuation Board
-40
to 85
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