摘要：本应用笔记介绍一般形式为E1收发器芯片的接口电路和显示如何分配变压器附近的阻力。它解释了为什么需要不同的保护技术，发射器和接收引脚。它讨论了回波损耗的重要性，并说明了如何计算。特色的DS2153/DS2154 E1单芯片收发器集成电路。Maxim > App Notes > Communications circuits Keywords: trandceiver, E1, transmitter, receiver, transformer, serier resistance, receive circuit, transmit circuit, return loss Oct 12, 2001 APPLICATION NOTE 352 General network interface design criteria for the DS2153 and DS2154 Abstract: This application note presents a general form of the interface circuit for E1 transceiver chips and shows how to distribute resistance around the transformers. It explains why the transmitter and receiver pins require different protection techniques. It discusses the importance of return loss and shows how to calculate it. The DS2153/DS2154 E1 single-chip transceiver ICs are featured. Figure 1. General network interface circuit. Figure 1 illustrates a general form of the interface circuit for E1 tr……