ST7540参考设计

GY@艳

ST7540参考设计（EVALST7540-2演示板）已经发展成为一个有用的工具来演示如何小，高性能的电力线节点，可以使用ST7540 FSK收发器来构建。与此同时，此参考设计能够评价ST7540特征，特别是其传输，并通过对电源线实际通信接收的表演。he ST7540 reference design has been developed as a useful tool to demonstrate how a small, high-performance powerline node can be built using the ST7540 FSK transceiver.With this reference design, it is possible to evaluate the ST7540 features, in particular, its transmitting and receiving performances through actual communication on the power line.The ST7540 reference design may be considered to be composed of three main sections:● Power supply section, specifically tailored to match powerline coupling requirementsand to operate within a wide range of the input mains voltage● Modem and crystal oscillator section● Line coupling interface sectionThe coupling interface is designed to allow the ST7540 FSK transceiver to transmit andreceive on the mains using 72 kHz carrier frequencies, within the European CENELECstandard A-band specified for automatic meter reading.