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常用的运算放大器需要的是正负电源，但是如果你的系统只能提供单一的电源的话，为了能够使你的运放正常工作，推荐看看这个资料-common Operational Amplifiers need is plus or minus power, but if your system can only provide a single power supply, in order to make your Mancin normal work, recommend a look at this information

基于ARM Cortex-M3内核的STM32F103RBT6处理器为核心构建柔性锁相环的硬件实验平台，在STM32中模拟出三相电源电压，并在子程序中实现了SRF-PLL、DDSRF-PLL与DSOGI-PLL三种锁相环，通过IO口并行输出锁相结果，再通过DAC转换为可观测的模拟信号。源码包中包含了软件工程与硬件电路原理图两部分。

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ARM7―LPC2124―键盘开发实例 基于Keil uVision3源码开发再进行Proteus 7 联合对ARM7―LPC2124―I2C硬件电路仿真-ARM7-LPC2124-keyboard development examples Keil uVision3 source development based on further joint Proteus 7 on ARM7-LPC2124-I2C hardware circuit simulation

AD DRIVER platform is ARM3000,core is ARM7TDMI-AD DRIVER platform is ARM3000. ARM7TDMI core is

S08例程：本程序是显示模块的例程，所接器件为四位八段led数码管，其中PTB0-PTB3 与数码管的位选相连接，PTB4，PTB5与74LS164连接-S08 routines: this process is the routine display module, the access device for four eight led digital tube, which PTB0-PTB3 bit digital tube and connected to the election, PTB4, PTB5 connect with 74LS164

一个嵌入式RISC CPU 的Verilog 设计源码，可综合。内含详细的设计文挡。-an embedded RISC CPU design Verilog source code can be integrated. Detailed design containing the text block.

S3C2410下的NandFlash实验代码!-S3C2410 experimental code under the NANDFLASH!

LPC2368在IAR环境下的SD卡读写程序-LPC2368 in IAR environment, the SD card reader program

此示例演示如何配置 TIM1 周边产生 7 PWM 信号与 4 个不同的工作周期 （50%、 37.5%、 25%和 12.5%）。TIM1CLK = SystemCoreClock，分频器 = 0，TIM1 计数器时钟 = SystemCoreClockSystemCoreClock 设置为 72 兆赫为低密度、 介质密度、 高密度和连接线路设备。中等密度低密度值线和高密度值线设备，SystemCoreClock 设置为 24 MHz。