SIM卡封装1

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)

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：  微带滤波器设计，包括低通、带通和高通三型滤波器参数设计，能够设置频率范围，自动生成滤波器参数。(Microstrip filter design, including low-pass, band-pass and high pass filter parameter design, can set the frequency range, automatically generate filter parameters.)

说明：  高频感应加热设备电器原理图 Protel99格式 PDF格式 高频感应加热设备电器原理图(Electrical schematic diagram of high frequency induction heating equipment)

schema lcd display sc75823

FPGA和STM32F103的多轴控制硬件设计，包含原理图，PCB(FPGA and STM32F103 multi-axis control hardware design, including schematics, PCB)

电荷泵的详细说明，帮助理解及计算电荷泵的电压翻转器(Detailed description of charge pump)

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

对delta sigma进行设计，实现delta sigma ADC的设计(this is use for delta sigma adc ,and design and achieve adc)

说明：  DAC7811驱动，好用的，测试电路是芯片手册12页给出的电路(The driver of DAC7811,I tested it and it could work well.)