This is the second Half of our Transistor Circuits e-book. It contains a further 100 circuits, with many of them containing one or more Integrated Circuits (ICs).It's amazing what you can do with transistors but when Integrated Circuits came along, the whole field of electronics exploded.
上传时间： 2013-11-08
上传用户：603100257
今天，电视机与视讯转换盒应用中的大多数调谐器采用的都是传统单变换MOPLL概念。这种调谐器既能处理模拟电视讯号也能处理数字电视讯号，或是同时处理这两种电视讯号(即所谓的混合调谐器)。在设计这种调谐器时需考虑的关键因素包括低成本、低功耗、小尺寸以及对外部组件的选择。本文将介绍如何用英飞凌的MOPLL调谐芯片TUA6039-2或其影像版TUA6037实现超低成本调谐器参考设计。这种单芯片ULC调谐器整合了射频和中频电路，可工作在5V或3.3V，功耗可降低34%。设计采用一块单层PCB，进一步降低了系统成本，同时能处理DVB-T/PAL/SECAM、ISDB-T/NTSC和ATSC/NTSC等混合讯号，可支持几乎全球所有地区标准。图1为采用TUA6039-2/TUA6037设计单变换调谐器架构图。该调谐器实际上不仅是一个射频调谐器，也是一个Half NIM，因为它包括了中频模块。射频输入讯号透过一个简单的高通滤波器加上中频与民间频段(CB)陷波器的组合电路进行分离。该设计没有采用PIN二极管进行频段切换，而是采用一个非常简单的三工电路进行频段切换。天线阻抗透过高感抗耦合电路变换至已调谐的输入电路。然后透过英飞凌的高增益半偏置MOSFET BF5030W对预选讯号进行放大。BG5120K双MOSFET可以用于两个VHF频段。在接下来的调谐后带通滤波器电路中，则进行信道选择和邻道与影像频率等多余讯号的抑制。前级追踪陷波器和带通滤波器的容性影像频率补偿电路就是专门用来抑制影像频率。
上传时间： 2013-11-21
上传用户：时代将军
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ** RELEASE NOTES *** *** *** *** ***** *** *** *** *** *** *** *** *** *** *** *** *** *** 1) RELEASE NOTES: --- --- ---- The release notes are now provided in PDF format in the file: \SOFTWARE\uCOS-II\DOC\RelV251.PDF 2) FEATURES SINCE V2.00: --- --- --- ----- All the features added since V2.00 are described in the PDF file: \SOFTWARE\uCOS-II\DOC\NewV251.PDF 3) EVENT FLAGS: -------------- Event Flags are discussed in AN-1007 (see www.Micrium.com/app_notes.htm) 4) QUICK REFERENCE CHART: ------------------------ A Quick Reference Chart for all the functions in V2.51 is provided in the following .PDF files: \SOFTWARE\uCOS-II\DOC\QuickRefChartV251-Color.PDF Once printed, simply FOLD the page in Half and if you have a LAMINATION machine, you can protect the chart by laminating it.
上传时间： 2015-04-06
上传用户：zq70996813
computes the eigenvalues of a symmetric tridiagonal * matrix T. The user may ask for all eigenvalues, all eigenvalues in the Half-open interval (VL, VU], or the IL-th through IU-th eigenvalues.
标签： T. eigenvalues tridiagonal eigenvalue
上传时间： 2014-01-21
上传用户：CSUSheep
The Rayleigh Integral Method is useful in computing the acoustic properties of a flat panel radiating into a Half space.
标签： properties computing Rayleigh Integral
上传时间： 2015-12-07
上传用户：youmo81
Linux内核进程管理 1、linux进程管理的模块组织框架 2、相关数据结构。 3、进程调度原则，调度算法,。 4、进程的创建和运行管理。 5、进程间通讯。 6、更多的技术 进程调度和中断处理交接 进程管理涉及的内核机制：bottom-Half处理，等待队列 Linux/SMP的进程管理和调度技术 7、概述2.4的新特点
上传时间： 2013-12-29
上传用户：ZJX5201314
将数字时间转换为英语口语表达形式，控制台形式。其实核心代码为一个类，可以自己修改输出形式。 比如输入 8 15 10 45 5 30 2 20 2 40 0 0 就能转换为： It s twenty past eight It s a quarter past eight It s a quarter to eleven It s Half past five It s twenty past two It s twenty to three 注意： 输入 0 0 后结束并显示结果 方式为每行两个数，中间用空格空开 第一个数0到12表示小时，第二个数0到59表示分钟
上传时间： 2013-12-09
上传用户：大融融rr
simulates coin tossing. Let the program toss a coin each time the user chooses the “Toss Coin” menu option. Count the number of times each side of the coin appears. Display the results. The program should call a separate method flip that takes no arguments and returns false for tails and true for heads. [ Note: If the program realistically simulates coin tossing, each side of the coin should appear approximately Half the time.]
标签： the coin simulates chooses
上传时间： 2014-08-30
上传用户：pompey
This program uses the HF flag of a FIFO to trigger reads, guaranteeing that the FIFO is never blocked for the writer, giving high throughput for the reader (bursts of D/2 = 128) and guaranteeing that the the reader will not be stuck in the top Half of the FIFO.
标签： FIFO guaranteeing the program
上传时间： 2016-05-05
上传用户：784533221
DESCRIPTION =========== This example project shows how to use the IAR Embedded Workbench for ARM to develop code for the Atmel AT91SAM9261 evaluation boards. It shows basic use of parallel I/O, timer and the interrupt controller. It starts by showing different patterns on the LED s separated by Half second. COMPATIBILITY ============= The project is compatible with the AT91SAM9261-EK board.
标签： DESCRIPTION Workbench Embedded example
上传时间： 2016-10-16
上传用户：yzy6007
