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七、专用免提通话电路徒弟:上一讲论述了通用免提通话电路,请介绍专用通话电路。师傅:这一讲我们着重介绍MC34018专用免提通话电路,该集成电路将发送放大器,接收放大器,发送检测放大器和接收检测放大器等做在一个芯片上。比起通用集成电路,专用集成电路外部电路比较简单。徒弟:MC34018内部可分为几个部分? 师傅:MC34018内部原理框图如图1中的虚线框内所示,其内部可分为四个部分:发送通道,接收通道,
Seven, dedicated hands-free calling circuit Apprentice: The last talk about the universal speakerphone circuit, please introduce the dedicated call circuit. Master: This talk focuses on the MC34018 hands-free speakerphone circuit, the integrated circuit will send the amplifier, receiver amplifier, receiver amplifier to send and receive detection amplifier on a single chip. Compared to general-purpose integrated circuits, ASIC external circuit is relatively simple. Apprentice: MC34018 internal can be divided into several parts? Master: MC34018 internal block diagram shown in the dashed box in Figure 1, the internal can be divided into four parts: send channel, receive channel,