变形V3.0

双闭环正激电路仿真，已验证输出，效果稳定，(Double closed-loop circuit simulation, verified output, stable effect,)

说明：  基于单片机的电阻、电容、电感测试仪 可测电容，电感，电阻等元器件的值(Resistance, Capacitance and Inductance Tester Based on Single Chip Microcomputer)

制作电子负载，恒压、恒流、恒阻的情况。有原理图、PCB板，可以参考一下。(Make electronic load, constant pressure, constant current, constant resistance. There is a schematic diagram, PCB board, can be referred to.)

电路的连接图，程序都有注释，仿真平台protues，适合初学的人(The connection diagram of the circuit, the program has the annotation, the simulation platform Protues, suitable for the first student)

Basic principle of LDPC code and FPGA implementation of LDPC code

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)

SNDR用于ADC计算信号噪声比，仅供参考学习，~~~(SNDR for ADC signal to noise ration calculation, for ur ref,~~~~~)

单片机电容触摸屏硬件PCB设计，layout(Microcontroller, capacitor, touch screen, hardware, PCB design, layout)

主要是介绍ARM的整个开发流程，讲述的还是比较具体的。(The whole development process of arm)

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.)