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  • 移动无线终端导航AFE和数据转换器

    Abstract: High-speed and low-speed data converters serve critical functions in modern broadband mobile radios. This application note outlines how todetermine high-speed data converter performance requirements in baseband sampling radio architectures. Also, system partition strategies andadvantages are outlined when considering a high-speed analog front-end (AFE) solution.

    标签: AFE 移动 无线终端 导航

    上传时间: 2013-11-02

    上传用户:jjj0202

  • 数字卫星设备控制兼容的天线供电系统设计

    Abstract: This application note discusses a design for a phantom antenna power-supply system compatible with theDigital Satellite Equipment Control (DiSEqC) communication standard, using the MAX16948 automotive dual, highvoltageLDO/switch. The presented application circuit provides a remote antenna power supply and also enables onewaycommunication from the radio head unit to the remote antenna. This system architecture offers flexibility inDiSEqC tone-burst frequency choice (100Hz to 30kHz), enabling users the ability to select the best frequency for theirapplication.

    标签: 数字卫星 控制 兼容 供电系统设计

    上传时间: 2013-11-17

    上传用户:fnhhs

  • 如何优化ISM无线电频率(RF)系统

    Abstract: With industrial/scientific/medical (ISM) band radio frequency (RF) products, often times users are new to the structure of Maxim's low pin-count transmitters andfully integrated superheterodyne receivers. This tutorial provides simple steps that can be taken to get the best performance out of these transmitters and receivers whileproviding techniques to measure the overall capability of the design.

    标签: ISM RF 无线电频率

    上传时间: 2013-11-02

    上传用户:yph853211

  • 基于ZigBee技术的无线智能家用燃气报警系统

    在研究传统家用燃气报警器的基础上,以ZigBee协议为平台,构建mesh网状网络实现网络化的智能语音报警系统。由于传感器本身的温度和实际环境温度的影响,传感器标定后采用软件补偿方法。为了减少系统费用,前端节点采用半功能节点设备,路由器和协调器采用全功能节点设备,构建mesh网络所形成的家庭内部报警系统,通过通用的电话接口连接到外部的公用电话网络,启动语音模块进行报警。实验结果表明,在2.4 GHz频率下传输,有墙等障碍物的情况下,节点的传输距离大约为35 m,能够满足家庭需要,且系统工作稳定,但在功耗方面仍需进一步改善。 Abstract:  On the basis of studying traditional household gas alarm system, this paper proposed the platform for the ZigBee protocol,and constructed mesh network to achieve network-based intelligent voice alarm system. Because of the sensor temperature and the actual environment temperature, this system design used software compensation after calibrating sensor. In order to reduce system cost, semi-functional node devices were used as front-end node, however, full-function devices were used as routers and coordinator,constructed alarm system within the family by building mesh network,connected to the external public telephone network through the common telephone interface, started the voice alarm module. The results indicate that nodes transmit about 35m in the distance in case of walls and other obstacles by 2.4GHz frequency transmission, this is able to meet family needs and work steadily, but still needs further improvement in power consumption.

    标签: ZigBee 无线智能 报警系统

    上传时间: 2013-10-30

    上传用户:swaylong

  • LPC1700系列芯片勘误手册

    This errata sheet describes both the known functional problems and anydeviations from the electrical specifications known at the release date ofthis document.Each deviation is assigned a number and its history is tracked in a table atthe end of the document.

    标签: 1700 LPC 系列芯片 勘误

    上传时间: 2013-11-22

    上传用户:liangliang123

  • LPC1300系列产品勘误数据手册

    On the LPC13xx, programming, erasure and re-programming of the on-chip flash can be performed using In-System Programming (ISP) via the UART serial port, and also, can be performed using In-Application Programming (IAP) calls directed by the end-user code. For In-System Programming (ISP) via the UART serial port, the ISP command handler (resides in the bootloader) allows erasure of one or more sector (s) of the on-chip flash memory.

    标签: 1300 LPC 勘误 数据手册

    上传时间: 2013-12-13

    上传用户:lmq0059

  • LPC1100系列微控制器勘误手册

    This errata sheet describes both the known functional problems and anydeviations from the electrical specifications known at the release date ofthis document.Each deviation is assigned a number and its history is tracked in a table atthe end of the document.

    标签: 1100 LPC 微控制器 勘误

    上传时间: 2014-12-31

    上传用户:thuyenvinh

  • 半导体制造技术_英文教程

    The correct answer for each test bank question is highlighted in bold. Test bank questions are based on the end-of-chapter questions. If a student studies the end-of-chapter questions (which are linked to the italicized words in each chapter), then they will be successful on the test bank questions.

    标签: 半导体制造技术 英文 教程

    上传时间: 2014-12-31

    上传用户:旗鱼旗鱼

  • 用汇编设计的基于文本编辑器

    1 任务 设计一个文本编辑器。 2 基本要求 1 如图所示,设计一个有菜单栏的编辑窗口,在该窗口可以实现文本的输入,利用DEL键、BackSpace键、Home键、End键、上下左右光标键,实现对输入文本的全屏幕编辑。 2 实现文件的新建、打开、保存、另存为与退出等功能。 包含 设计思路、技术报告、和不同阶段的设计源代码 扩展要求 1 要求使用彩色组和背景颜色来设计界面颜色。 2 模拟一些著名编辑器(如Source Insight)的其它功能,如比较详细的帮助功能,对特定的命令或保留字(如C语言或汇编语言)能显示不同的醒目颜色。 3 自己参考其它编辑器进行发挥。

    标签: 汇编 文本编辑器

    上传时间: 2013-11-03

    上传用户:lhc9102

  • lcd计数显示程序

    library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; ---- Uncomment the following library declaration if instantiating ---- any Xilinx primitives in this code. --library UNISIM; --use UNISIM.VComponents.all; entity counter is     Port ( clk : in std_logic;      resetn : in std_logic;            dout : out std_logic_vector(7 downto 0);            lcd_en : out std_logic;            lcd_rs : out std_logic;            lcd_rw   : out std_logic); end counter;

    标签: lcd 计数显示 程序

    上传时间: 2013-10-30

    上传用户:wqxstar