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.
上傳時(shí)間： 2013-11-08
上傳用戶：603100257
今天，電視機(jī)與視訊轉(zhuǎn)換盒應(yīng)用中的大多數(shù)調(diào)諧器采用的都是傳統(tǒng)單變換MOPLL概念。這種調(diào)諧器既能處理模擬電視訊號(hào)也能處理數(shù)字電視訊號(hào)，或是同時(shí)處理這兩種電視訊號(hào)(即所謂的混合調(diào)諧器)。在設(shè)計(jì)這種調(diào)諧器時(shí)需考慮的關(guān)鍵因素包括低成本、低功耗、小尺寸以及對(duì)外部組件的選擇。本文將介紹如何用英飛凌的MOPLL調(diào)諧芯片TUA6039-2或其影像版TUA6037實(shí)現(xiàn)超低成本調(diào)諧器參考設(shè)計(jì)。這種單芯片ULC調(diào)諧器整合了射頻和中頻電路，可工作在5V或3.3V，功耗可降低34%。設(shè)計(jì)采用一塊單層PCB，進(jìn)一步降低了系統(tǒng)成本，同時(shí)能處理DVB-T/PAL/SECAM、ISDB-T/NTSC和ATSC/NTSC等混合訊號(hào)，可支持幾乎全球所有地區(qū)標(biāo)準(zhǔn)。圖1為采用TUA6039-2/TUA6037設(shè)計(jì)單變換調(diào)諧器架構(gòu)圖。該調(diào)諧器實(shí)際上不僅是一個(gè)射頻調(diào)諧器，也是一個(gè)Half NIM，因?yàn)樗酥蓄l模塊。射頻輸入訊號(hào)透過(guò)一個(gè)簡(jiǎn)單的高通濾波器加上中頻與民間頻段(CB)陷波器的組合電路進(jìn)行分離。該設(shè)計(jì)沒(méi)有采用PIN二極管進(jìn)行頻段切換，而是采用一個(gè)非常簡(jiǎn)單的三工電路進(jìn)行頻段切換。天線阻抗透過(guò)高感抗耦合電路變換至已調(diào)諧的輸入電路。然后透過(guò)英飛凌的高增益半偏置MOSFET BF5030W對(duì)預(yù)選訊號(hào)進(jìn)行放大。BG5120K雙MOSFET可以用于兩個(gè)VHF頻段。在接下來(lái)的調(diào)諧后帶通濾波器電路中，則進(jìn)行信道選擇和鄰道與影像頻率等多余訊號(hào)的抑制。前級(jí)追蹤陷波器和帶通濾波器的容性影像頻率補(bǔ)償電路就是專門(mén)用來(lái)抑制影像頻率。
上傳時(shí)間： 2013-11-21
上傳用戶：時(shí)代將軍
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ** 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.
上傳時(shí)間： 2015-04-06
上傳用戶：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.
標(biāo)簽： T. eigenvalues tridiagonal eigenvalue
上傳時(shí)間： 2014-01-21
上傳用戶：CSUSheep
The Rayleigh Integral Method is useful in computing the acoustic properties of a flat panel radiating into a Half space.
標(biāo)簽： properties computing Rayleigh Integral
上傳時(shí)間： 2015-12-07
上傳用戶：youmo81
Linux內(nèi)核進(jìn)程管理 1、linux進(jìn)程管理的模塊組織框架 2、相關(guān)數(shù)據(jù)結(jié)構(gòu)。 3、進(jìn)程調(diào)度原則，調(diào)度算法,。 4、進(jìn)程的創(chuàng)建和運(yùn)行管理。 5、進(jìn)程間通訊。 6、更多的技術(shù) 進(jìn)程調(diào)度和中斷處理交接 進(jìn)程管理涉及的內(nèi)核機(jī)制：bottom-Half處理，等待隊(duì)列 Linux/SMP的進(jìn)程管理和調(diào)度技術(shù) 7、概述2.4的新特點(diǎn)
標(biāo)簽： Linux linux 進(jìn)程 內(nèi)核
上傳時(shí)間： 2013-12-29
上傳用戶：ZJX5201314
將數(shù)字時(shí)間轉(zhuǎn)換為英語(yǔ)口語(yǔ)表達(dá)形式，控制臺(tái)形式。其實(shí)核心代碼為一個(gè)類，可以自己修改輸出形式。 比如輸入 8 15 10 45 5 30 2 20 2 40 0 0 就能轉(zhuǎn)換為： 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： 輸入 0 0 后結(jié)束并顯示結(jié)果 方式為每行兩個(gè)數(shù)，中間用空格空開(kāi) 第一個(gè)數(shù)0到12表示小時(shí)，第二個(gè)數(shù)0到59表示分鐘
標(biāo)簽： 數(shù)字 時(shí)間轉(zhuǎn)換 英語(yǔ)
上傳時(shí)間： 2013-12-09
上傳用戶：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.]
標(biāo)簽： the coin simulates chooses
上傳時(shí)間： 2014-08-30
上傳用戶：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.
標(biāo)簽： FIFO guaranteeing the program
上傳時(shí)間： 2016-05-05
上傳用戶：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.
標(biāo)簽： DESCRIPTION Workbench Embedded example
上傳時(shí)間： 2016-10-16
上傳用戶：yzy6007
蟲(chóng)蟲(chóng)下載站版權(quán)所有 京ICP備2021023401號(hào)-1
