基于通用集成運算放大器，利用MASON公式設計了一個多功能二階通用濾波器，能同時或分別實現低通、高通和帶通濾波，也能設計成一個正交振蕩器。電路的極點頻率和品質因數能夠獨立、精確地調節。電路使用4個集成運放、2個電容和11個電阻，所有集成運放的反相端虛地。利用計算機仿真電路的通用濾波功能、極點頻率和品質因數的獨立控制和正交正弦振蕩，從而證明該濾波器正確有效。
Abstract:
A new multifunctional second-order filter based on OPs was presented by MASON formula. Functions， such as high-pass， band-pass， low-pass filtering， can be realized respectively and simultaneously， and can become a quadrature oscillator by modifying resistance ratio. Its pole angular frequency and quality factor can be tuned accurately and independently. The circuit presented contains four OPs， two capacitors， and eleven resistances， and inverting input of all OPs is virtual Ground. Its general filtering， the independent control of pole frequency and quality factor and quadrature sinusoidal oscillation were simulated by computer， and the result shows that the presented circuit is valid and effective.
DSP音頻處理示例The benefits of real-time analysis provided by DSP/BIOS are often required in programs that
were engineered without it. When the program is not built from the Ground up using the
DSP/BIOS kernel and real-time analysis features, the lack of familiarity prevents engineers
from reaping the benefits of this very powerful tool set, especially in the final stage of
development when real-time analysis is needed most. This application note provides an
example of the necessary steps required to utilize DSP/BIOS features in order to bring these
solutions to bear in an existing application.
palm編成,這種書很少,有興趣看看
Title: Palm Programming: The Developer s Guide
URL: http://safari.oreilly.com/JVXSL.asp?x=1&mode=section&sortKey=rank&sortOrder=desc&view=book&xmlid=1-56592-525-4&open=false&srchText=palm+programming&code=&h=&m=&l=1&catid=&s=1&b=1&f=1&t=1&c=1&u=1&page=0
ISBN: 1-56592-525-4
Author: Julie McKeehan/ Neil Rhodes
Publisher: O Reilly
Page: 478
Edition: 1st edition (December 1998)
Catalog: PDA programming / Palm
Format: pdf
Size: 2.06M
Supplier:
Summary: Emerging as the bestselling hand-held computers of all time, PalmPilots have spawned intense developer activity and a fanatical following. Used by Palm in their developer training, this tutorial-style book shows intermediate to experienced C programmers how to build a Palm application from the Ground up. Includes a CD-ROM with source code and third-party developer tools
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％ set some variables in the workspace to control behaviour:
％
％ graphicsMode 0 no graphics,
％ 1 graphics, particles, beacons, Ground truth
％ 2 graphics, as above + range circles
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％ perfect 0 use beacon range data
％ 1 use Ground truth range data
％ clear a
Global Software:
Why You Should Care
Internationalization is the process of
developing a piece of software from the
Ground up so that it can be translated
for a new user community without
recompilation
In just 24 lessons of one hour or less, you will be able to build dynamic Web sites using JavaServer Pages. Using a straightforward, step-by-step approach, each lesson builds on the previous ones, enabling you to learn the essentials of JavaServer Pages 2.0 from the Ground up. The book includes Apache Tomcat, Sun s reference implementation of JSP, so you can start developing applications immediately.
