按分类查找:

  • 表面贴装设计和焊盘图形标准通用要求

    IPC-7351不只是一个强调新的元件系列更新的焊盘图形的标准,如方型扁平无引线封装QFN (Quad Flat No-Lead)和小外型无引线封装SON (Small Outline No-Lead);还是一个反映焊盘图形方面的研发、分类和定义——这些建立新的工业CAD数据库的关键元素——的全新变化的标准。 ...

    /dl/10487.html

    标签: 表面贴装 焊盘 图形 标准

    上传时间: 2013-05-27

    上传用户:mdrd3080

  • QFN SMT工艺设计指导

    QFN SMT工艺设计指导.pdf 一、基本介绍 QFN(Quad Flat No Lead)是一种相对比较新的IC封装形式,但由于其独特的优势,其应用得到了快速的增长。QFN是一种无引脚封装,它有利于降低引脚间的自感应系数,在高频领域的应用优势明显。QFN外观呈正方形或矩形,大小接近于CSP,所以很薄很轻。元件底部具有与底面水平的焊端, ...

    /dl/13211.html

    标签: QFN SMT 工艺 设计指导

    上传时间: 2013-04-24

    上传用户:吴之波123

  • 采用FlatP_Cell技术的ROM设计和分析

    本文介绍了Flat— Cell结构和采用Flat— Cell技术的ROM设计方法。包括Flat—Cell的工艺技术、Flat—Cell基本电路结构和ROM 放大器电路。

    /dl/21212.html

    标签: FlatP_Cell ROM

    上传时间: 2013-11-15

    上传用户:84425894

  • IC封裝製程簡介(IC封装制程简介)

    半導體的產品很多,應用的場合非常廣泛,圖一是常見的幾種半導體元件外型。半導體元件一般是以接腳形式或外型來劃分類別,圖一中不同類別的英文縮寫名稱原文為   PDID:Plastic Dual Inline Package SOP:Small Outline Package SOJ:Small Outline J-Lead Package PLCC:Plastic Leaded Chip Carrier QFP:Quad Fla ...

    /dl/22334.html

    标签: 封裝 IC封装 制程

    上传时间: 2014-01-20

    上传用户:苍山观海

  • IC封裝製程簡介(IC封装制程简介)

    半導體的產品很多,應用的場合非常廣泛,圖一是常見的幾種半導體元件外型。半導體元件一般是以接腳形式或外型來劃分類別,圖一中不同類別的英文縮寫名稱原文為   PDID:Plastic Dual Inline Package SOP:Small Outline Package SOJ:Small Outline J-Lead Package PLCC:Plastic Leaded Chip Carrier QFP:Quad Fla ...

    /dl/40471.html

    标签: 封裝 IC封装 制程

    上传时间: 2013-11-04

    上传用户:372825274

  • PIXIL is a small footprint operating environment, complete with PDA PIM applications, a browser and

    PIXIL is a small footprint operating environment, complete with PDA PIM applications, a browser and multimedia applications for small handheld and flat-panel based devices.

    /dl/154890.html

    标签: applications environment footprint operating

    上传时间: 2013-12-08

    上传用户:Andy123456

  • The goal of this project is to explore the idea of point-based radiosity, which is a shooting radio

    The goal of this project is to explore the idea of point-based radiosity, which is a shooting radiosity technique suggested by Mark Harris at UNC. The primary idea is that features available in graphics hardware can be utilized to perform radiosity calculations. Facilities such as flat shading, diff ...

    /dl/188102.html

    标签: point-based radiosity shooting explore

    上传时间: 2015-08-24

    上传用户:change0329

  • 著名书籍《世界是平的》的电子版

    著名书籍《世界是平的》的电子版,英文名字是《The world is flat》

    /dl/201605.html

    标签: 书籍 电子版

    上传时间: 2015-09-26

    上传用户:lgnf

  • This paper examines the asymptotic (large sample) performance of a family of non-data aided feedfor

    This paper examines the asymptotic (large sample) performance of a family of non-data aided feedforward (NDA FF) nonlinear least-squares (NLS) type carrier frequency estimators for burst-mode phase shift keying (PSK) modulations transmitted through AWGN and flat Ricean-fading channels. The asymptoti ...

    /dl/240334.html

    标签: performance asymptotic examines non-data

    上传时间: 2015-12-30

    上传用户:225588

  • This program simulates the bit-error-rate (BER) performance of OSTBC with L=4 antennas over the fr

    This program simulates the bit-error-rate (BER) performance of OSTBC with L=4 antennas over the frequency flat Rayleigh block fading channel The code is developed for real orthogonal design, code rate 1/2 modulation- 16 QAM with gray coding resulting in 2 bits/sec/Hz.

    /dl/272493.html

    标签: bit-error-rate performance simulates the

    上传时间: 2014-01-13

    上传用户:whenfly