ADT7470、fan speed controllor
标签： ADT7470
上传时间： 2016-07-14
上传用户：Jason
High-speed Precision Numerically Controlled Tapping Using Dual Predictive Control
标签： 神经网络控制
上传时间： 2016-07-20
上传用户：ss183968ss
virtex ultra scale plus 16nm vcu 188 board user guide. For high speed and ultra scale design prototype.
上传时间： 2017-05-16
上传用户：hewangfeng
在本课中，我们要用一个按键来实现跑马灯的 10 级调速。这又会涉及到键的去抖的问 题。 本课的试验结果是，每按一次按键，跑马速度就降低一级，共 10 级。 这里我们又增加了一个变量 speedlever，来保存当前的速度档次。 在按键里的处理中，多了当前档次的延时值的设置。 请看程序： ―――――――――――――――― #define uchar unsigned char //定义一下方便使用 #define uint unsigned int #define ulong unsigned long #include <reg52.h> //包括一个 52 标准内核的头文件 sbit P10 = P1^0; //头文件中没有定义的 IO 就要自己来定义了 sbit P11 = P1^1; sbit P12 = P1^2; sbit P13 = P1^3; sbit K1= P3^2; bit ldelay=0; //长定时溢出标记,预置是 0 uchar speed=10; //设置一个变量保存默认的跑马灯的移动速度 uchar speedlever=0; //保存当前的速度档次 char code dx516[3] _at_ 0x003b;//这是为了仿真设置的 //一个按键控制的 10 级变速跑马灯试验 void main(void) // 主程序 { uchar code ledp[4]={0xfe,0xfd,0xfb,0xf7};//预定的写入 P1 的值 uchar ledi; //用来指示显示顺序 uint n; RCAP2H =0x10; //赋 T2 的预置值 0x1000，溢出 30 次就是 1 秒钟 RCAP2L =0x00; TR2=1; //启动定时器 ET2=1; //打开定时器 2 中断 EA=1; //打开总中断 while(1) //主程序循环 { if(ldelay) //发现有时间溢出标记，进入处理 { ldelay=0; //清除标记 P1=ledp[ledi]; //读出一个值送到 P1 口 ledi++; //指向下一个 if(ledi==4) { ledi=0; //到了最后一个灯就换到第一个 } } if(!K1) //如果读到 K1 为 0 { for(n=0;n<1000;n++); //等待按键稳定 while(!K1); //等待按键松开 for(n=0;n<1000;n++); //等待按键稳定松开 speedlever++; if(speedlever==10)speedlever=0; speed=speedlever*3; //档次和延时之间的预算法则，也可以用查表方法，做出 不规则的法则 } } } //定时器 2 中断 timer2() interrupt 5 { static uchar t; TF2=0; t++; if((t==speed)||(t>30)) //比较一个变化的数值，以实现变化的时间溢出,同时限制了最慢速 度为 1 秒 { t=0; ldelay=1;//每次长时间的溢出，就置一个标记，以便主程序处理 } } ―――――――――――――――――――――― 请打开 lesson11 目录的工程，编译，运行，看结果： 按 K1，速度则降低一次，总共 10 个档次。
上传时间： 2017-11-06
上传用户：szcyclone
80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless, low voltage (2.7V–5.5V), low power, high speed (33 MHz)
标签： P80C31SBPN datasheet
上传时间： 2019-11-28
上传用户：blue sky
High-Speed, Low-Power Dual Operational Amplifier The AD826 features high output current drive capability of 50 mA min per amp, and is able to drive unlimited capacitive loads. With a low power supply current of 15 mA max for both amplifiers, the AD826 is a true general purpose operational amplifier. The AD826 is ideal for power sensitive applications such as video cameras and portable instrumentation. The AD826 can operate from a single +5 V supply, while still achieving 25 MHz of band width. Furthermore the AD826 is fully specified from a single +5 V to ±15 V power supplies. The AD826 excels as an ADC/DAC buffer or active filter in data acquisition systems and achieves a settling time of 70 ns to 0.01%, with a low input offset voltage of 2 mV max. The AD826 is available in small 8-lead plastic mini-DIP and SO packages.
上传时间： 2020-04-19
上传用户：su1254
transimpedance linearization circuitry. This allows it to drive video loads with excellent differential gain and phase perfor mance on only 50 mW of power. The AD8001 is a current feedback amplifier and features gain flatness of 0.1 dB to 100 MHz while offering differential gain and phase error of 0.01% and 0.025°. This makes the AD8001 ideal for professional video electronics such as cameras and video switchers. Additionally, the AD8001’s low distortion and fast settling make it ideal for buffer high-speed A-to-D converters. The AD8001 offers low power of 5.5 mA max (VS = ±5 V) and can run on a single +12 V power supply, while being capable of delivering over 70 mA of load current. These features make this amplifier ideal for portable and battery-powered applications where size and power are critical. The outstanding bandwidth of 800 MHz along with 1200 V/µs of slew rate make the AD8001 useful in many general purpose high-speed applications where dual power supplies of up to ±6 V and single supplies from 6 V to 12 V are needed. The AD8001 is available in the industrial temperature range of –40°C to +85°C.
上传时间： 2020-04-21
上传用户：su1254
This book gives a comprehensive overview of the technologies for the advances of mobile radio access networks. The topics covered include linear transmitters, superconducting filters and cryogenic radio frequency (RF) front head, radio over fiber, software radio base stations, mobile terminal positioning, high speed downlink packet access (HSDPA), multiple antenna systems such as smart antennas and multiple input and multiple output (MIMO) systems, orthogonal frequency division multiplexing (OFDM) systems, IP-based radio access networks (RAN), autonomic networks, and ubiquitous networks.
标签： Advances Networks Access Mobile Radio in
上传时间： 2020-05-26
上传用户：shancjb
Emerging technologies such as WiFi and WiMAX are profoundly changing the landscape of wireless broadband. As we evolve into future generation wireless networks, a primary challenge is the support of high data rate, integrated multi- media type traffic over a unified platform. Due to its inherent advantages in high-speed communication, orthogonal frequency division multiplexing (OFDM) has become the modem of choice for a number of high profile wireless systems (e.g., DVB-T, WiFi, WiMAX, Ultra-wideband).
标签： Broadband Wireless Networks
上传时间： 2020-05-26
上传用户：shancjb
Wireless technology has been evolving at a breakneck speed. The total number of cell-phones in use (as of 2011) was over 6 billion for a 7 billion world population [1] constituting 87% of the world population. Additionally, with user convenience be- coming paramount, more and more functions are being implemented wirelessly.
标签： Front-Ends Cognitive Receiver Radio
上传时间： 2020-05-26
上传用户：shancjb
