论文部分内容阅读
目前,摩托罗拉公司推出了MC33215型扬声电话及其接口线路IC。这种IC将语音网络、开关逻辑线路、扬声器和话筒放大器以及通常用分立元件产生的其它性能都集成在一块芯片上,从而大幅度降低了电话机的成本。 MC33215型扬话电话及其接几线路IC,只通过一个普通拨号器和一个振铃就能为一台全电子电话提供全部的功能。 这种器件由电话线供电,能在4.0mA低话线电流下运行,并能与标准话机并行工作。芯片上的高效供电线
Currently, Motorola introduced the MC33215 speakerphone and its interface circuit ICs. Such ICs reduce the cost of the telephone significantly by integrating the voice network, switching logic, loudspeakers and microphone amps, and other functions typically used to create discrete components on a single chip. The MC33215 speakerphone and its wired ICs provide full functionality for an all-electronic phone with just an ordinary dialer and a ringing tone. Powered by phone lines, this device operates at 4.0mA of low line current and works in parallel with standard telephones. On-chip high-efficiency power supply line