Motorola最近推出的MC33215扬声器电话及电话线接口电路,几乎拥有全部必要的功能,足以制成一种具有音控转换扬声器电话特点的全电子电话。它把通话网络、转换逻辑,扬声器电话和扬声放大器,以及其他一些通常借分立器件来实现的功能高度集成于一只芯片,可以减低电话的成本。 The recent introduction of Motorola’s MC33215 speaker phone and phone line interface circuitry, with almost all the necessary features, is enough to make an all-electronic phone featuring a voice-activated speakerphone. It lowers phone costs by integrating the call network, conversion logic, speakerphone and speaker amplifiers, and other functions that are typically implemented as discrete devices on a single chip.