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.
上傳時間: 2013-11-02
上傳用戶:jjj0202
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.
上傳時間: 2013-11-17
上傳用戶:fnhhs
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.
上傳時間: 2013-11-02
上傳用戶:yph853211
在研究傳統家用燃氣報警器的基礎上,以ZigBee協議為平臺,構建mesh網狀網絡實現網絡化的智能語音報警系統。由于傳感器本身的溫度和實際環境溫度的影響,傳感器標定后采用軟件補償方法。為了減少系統費用,前端節點采用半功能節點設備,路由器和協調器采用全功能節點設備,構建mesh網絡所形成的家庭內部報警系統,通過通用的電話接口連接到外部的公用電話網絡,啟動語音模塊進行報警。實驗結果表明,在2.4 GHz頻率下傳輸,有墻等障礙物的情況下,節點的傳輸距離大約為35 m,能夠滿足家庭需要,且系統工作穩定,但在功耗方面仍需進一步改善。 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.
上傳時間: 2013-10-30
上傳用戶:swaylong
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.
上傳時間: 2013-11-22
上傳用戶:liangliang123
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.
上傳時間: 2013-12-13
上傳用戶:lmq0059
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.
上傳時間: 2014-12-31
上傳用戶:thuyenvinh
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.
上傳時間: 2014-12-31
上傳用戶:旗魚旗魚
1 任務 設計一個文本編輯器。 2 基本要求 1 如圖所示,設計一個有菜單欄的編輯窗口,在該窗口可以實現文本的輸入,利用DEL鍵、BackSpace鍵、Home鍵、End鍵、上下左右光標鍵,實現對輸入文本的全屏幕編輯。 2 實現文件的新建、打開、保存、另存為與退出等功能。 包含 設計思路、技術報告、和不同階段的設計源代碼 擴展要求 1 要求使用彩色組和背景顏色來設計界面顏色。 2 模擬一些著名編輯器(如Source Insight)的其它功能,如比較詳細的幫助功能,對特定的命令或保留字(如C語言或匯編語言)能顯示不同的醒目顏色。 3 自己參考其它編輯器進行發揮。
上傳時間: 2013-11-03
上傳用戶:lhc9102
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;
上傳時間: 2013-10-30
上傳用戶:wqxstar