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常用的有源晶振封装库和原理图库，AD环境。(AD environment commonly used active crystal package library and schematic library)

说明：  4G模块EC20开发资料，硬件设计手册，AT指令，原理图和PCB图封装，完整开发资料。(Development Data of 4G Module EC20 and Hardware Design Manual)

矢量网络分析仪的基本原理，内容详细，实用！(Basic Principle of Vector Network Analyser)

AD9914是一款直接数字频率合成器(DDS)，内置一个12位数模转换器，目标工作速率最高达3.5 GSPS，产生单音信号，双音信号以及调幅调相信号(AD9914 is a direct digital frequency synthesizer (DDS) with a 12 digit analog converter with a target operating rate of up to 3.5 GSPS, producing a single tone signal, a dual tone signal and a phase modulation signal.)

EM78P451 SPI官方使用程序，内涵主机模式、从机模式已经.INC头文件。(EM78P451 SPI The official use program, the connotations of the host mode, the slave mode has.INC header file.)

FloTHERM的使用入门手册，写的很好(FloTHERM Introduction Manual, well written)

说明：  基于FPGA的任意波形发生器DDS,verilog编写，正常使用(Arbitrary waveform generator DDS based on FPGA)

说明：  包含主板，驱动板，运放等所需全部板工程文件(Contains all board engineering files required for motherboard, driver board, op amp, etc.)

schema lcd display sc75823

说明：  全志A33芯片资料，包括芯片手册，用户使用说明等等(Quanzhi A33 Chip Data)