CMX264数据手册集成电路（IC）的音频专用规格书PDF

描述 Description

The CMX264 is a frequency domain voice scrambler for use in analogue cellular phone systems, fixed and rolling code voice scrambler applications.
It contains separate Tx and Rx paths for full duplex operation and operates under µProcessor control via a simple serial interface.
In the Tx path, scrambling is achieved by splitting the audio band into two parts, or sub-bands, and frequency inverting each one.
The frequency at which the signal is split, the \"split-point\", can be either fixed or rolling between four possible settings resulting in a transmitted audio signal which is unintelligible to eavesdroppers.
Descrambling is achieved by a receive device set to the same split point as the remote transmitter.
Thus if the Tx and Rx devices are synchronously cycled through the same sequence of split points, a clear recovered signal will emerge at the output of the receiver
A 4.433619MHz crystal is used allowing up to four split points to be programmed. The device is designed to be compatible with existing mobile and cell phone circuitry.
Block Diagram
 

特性 Features

·Full Duplex Operation
·High Recovered Audio Quality
·Uses Split-Band Inversion
·Fixed or Rolling Code Capabilities
·Simple Serial Interface
·Low Power Requirement with Standby Mode

应用 Application

·Mobile Radio
·Fixed Code Voice Scramblers
·Rolling Code Voice Scramblers

简介

CMX264属于集成电路（IC）的音频专用。由制造生产的CMX264音频专用音频专用的半导体器件专为音频信号的滤波、驱动、放大、转换和接口而设计。特征包括功能、应用、通道数、接口、电压和规格。应用包括音频系统、汽车音频、消费类音频、乐器、专业音频、通信系统、电信系统、数字音频、驱动器、前置放大器、信号混合、信号处理、语音触发器解决方案和 10 Base-T。