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PCB相关 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。 ...
经验分享 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， ...
模拟电子 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。
PCB相关 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 ...
可编程逻辑 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 ...
嵌入式Linux 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.
Windows Mobile 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 ...
其他书籍 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》
其他书籍 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 ...
邮电通讯系统 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.