A single chip terminal solution for high-end telephone applications

Proceedings of the IEEE 2001 Custom Integrated Circuits Conference (Cat. No.01CH37169) Pub Date : 2001-05-06 DOI:10.1109/CICC.2001.929813

Vinod Nair Gopikuttan Nair, M. Erdmann, S. M. Mishra, J. Povazanec, A. Shaligram, C. Hu

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引用次数: 1

Abstract

The single chip telephone IC, INCA (INfineon Codec with U/sub PN/ transceiver and embedded microcontroller featuring Acoustic echo cancellation), integrates all the functions necessary for a digital voice and data terminal. With the 2-wire U/sub PN/ analog line transceiver, the INCA implements all subscriber access functions for digital terminals. Key feature of the chip is a smart acoustic echo cancellation and suppression algorithm, which allows comfortable full-duplex speakerphone conversations. Different digital interfaces allow connection to a variety of devices, including a 12 Mb/s USB (Universal Serial Bus) interface for PC host communication. The basic application of the INCA is in terminal equipment, where microphone, loudspeaker, headset and handset can be connected directly to the analog front end. Additionally the INCA provides a mechanism to control other U/sub PN/ terminals. This mode allows one to cascade U/sub PN/ telephones via its IOM-2 (ISDN Oriented Modular) interface. The INCA is a 0.35 /spl mu/ CMOS device and operates with a single 3.3 V supply.

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用于高端电话应用的单芯片终端解决方案

单片电话IC INCA(英飞凌编解码器，带U/sub PN/收发器和嵌入式微控制器，具有声学回声消除功能)集成了数字语音和数据终端所需的所有功能。INCA采用2线U/sub PN/模拟线收发器，实现数字终端的所有用户接入功能。该芯片的主要特点是智能回声消除和抑制算法，允许舒适的全双工扬声器通话。不同的数字接口允许连接到各种设备，包括用于PC主机通信的12mb /s USB(通用串行总线)接口。INCA的基本应用是终端设备，麦克风、扬声器、耳机和手机可以直接连接到模拟前端。此外，INCA还提供了控制其他U/sub PN/终端的机制。这种模式允许通过IOM-2 (ISDN定向模块化)接口级联U/sub PN/电话。INCA是一个0.35 /spl mu/ CMOS器件，使用单个3.3 V电源。

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Proceedings of the IEEE 2001 Custom Integrated Circuits Conference (Cat. No.01CH37169)

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