视频A／D转换器结构和折叠—插值技术的应用

讨论了已有的几种Ａ／Ｄ转换器结构原理及其特点，介绍了一种新研制的ＣＭＯＳ折叠－插值Ａ／Ｄ芯片结构的设计原理和性能特点。     

超高速A/D转换器结构

介绍了超高速Ａ／Ｄ转换器的四种常用结构：全并行（闪烁型）结构、二步式结构、折迭插入式结构以及每级一位结构。以８位超高速Ａ／Ｄ转换器为例，分析比较了这四种结构的工作原理、结构特点、以及设计制作上存在的问题；并着重对折迭插入式ＡＤＣ的结构原理进行了详细介绍。超高速Ａ／Ｄ转换器主要应用于高分辨率雷达，特别是带有活动目标显示的雷达、以及数字存储示波器、瞬态记录仪和ＨＤＴＶ等方面。     

超高速A／D转换器的结构

介绍了超高速Ａ／Ｄ转换器的四种常用结构：全并行（闪烁型）结构、二步式结构、折迭插入式结构以及每级一位结构。以８位超高速Ａ／Ｄ转换器为例，分析比较了这四种结构的工作原理、结构特点、以及设计制作上存在的问题；并着重对折迭插入式ＡＤＣ的结构原理进行了详细介绍。超高速Ａ／Ｄ转换器主要应用于高分辨率雷达，特别是带有活动目标的雷达、以及数字存储示波器、瞬态记录仪和ＨＤＴＶ等方面。     

高速A／D的原理及应用

本文简单概述了两种高速Ａ／Ｄ转换的原理，详细介绍了几种最为常用的高速并行Ａ／Ｄ器件的性能特点，并给出了其典型应用。     

TLC32044在语音信号处理中的应用

文章介绍了高精度可编程Ａ／Ｄ、Ｄ／Ａ芯片ＴＬＣ３２０４４的性能特点、工作原理及其在语音处理中的应用     

电子机械结构的计算机辅助设计与制造

本文主要结合几种ＣＡＤ／ＣＡＭ软件，简单介绍了电子机械结构的计算机辅助设计与制造，就当前流行的ＣＡＤ／ＣＡＭ软件不同的功能和特点进行了分析。     

一种视频8位CMOS折叠—插值A／D转换器的设计

ＣＭＯＳ折叠式Ａ／Ｄ转换器结构是一种能兼顾面积，功耗与转换速度的新型结构，分析了折叠－插值Ａ／Ｄ转换器的原理，着重介绍一种８位ＣＭＯＳ折叠－插值电路的设计考虑和版图设计，最后给出了模拟结果。     

CMOS单片12位D／A转换器的设计优化

本文介绍了一种高速单片ＣＭＯＳ１２位Ｄ／Ａ转换器的设计。着重阐述了电阻开关网络的按比例匹配设计原理、结构特点，激光动态修调网络的结构设计，以及逻辑控制和功能特点。该Ｄ／Ａ转换器的线性误差、微分误差满刻度误差均满足１２位精度。在１５Ｖ工作电压下，满度电流建立时间为０．６μｓ，功耗２０ｍＷ。     

SDA9280 D／A电路：在数学处理彩色电视机中的应用

本文首先介绍了数字信号的特点，对Ｄ／Ａ（数字／模拟）转换电路的工作原理做了较为详细的说明，同时对ＳＤＡ９２８０集成电路进行了较为系统的分析，对ＳＤＡ９２８０在数字处理彩色电视机中的应用作了说明。     

一种新的实时通用视频处理器的设计

实时通用视频处理器是图像处理系统的核心，协调实时通用视频处理器的Ａ／Ｄ，ＤＳＰ，Ｄ／Ａ三者的时序，使ＤＳＰ有更多的时间处理图像数据是设计的关键。在分析国内外文献中提出了逆程和正程工作方式下的视频处理器原理和结构后，又提出一种新的全程工作方式的视频处理器设计方案，并对三种工作方式的电路及工作原理进行了比较。     

D/A和A/D转换器型谱的品种优化分析

本文从D/A与A/D转换器的基本概念和制造技术着手概述,特别对D/A和A/D转换器的应用之主要选择因素,进行了着重说明。随后,提出了D/A和A/D转换器优化品种的原则意见。     

Design and test methodology for an analog-to-digital convertermultichip module for experimental all-digital radar receiver operatingat 2 gigasamples/s

In this paper, we describe the development of an analog-to-digital (A/D) converter subsystem, based on a monolithic A/D converter chip, a demultiplexer chip, and a laminate multichip module, for an experimental all-digital receiver for an airborne radar. The evolution of techniques for recording and analyzing all the data from the assembled multichip module at the full sample rate of the A/D converter, and the ways in which this test data can be used to analyze the performance of A/D converters, are described. The problems which arise in the testing of GHz A/D converters, a number of which are unique to A/D conversion at such high sample rates, are pointed out. Finally, comments on future directions in the test of high performance A/D converters are presented     

Simultaneous Static Testing of A/D and D/A Converters Using a Built‐in Structure

Static testing of analog‐to‐digital (A/D) and digital‐to‐analog (D/A) converters becomes more difficult when they are embedded in a system on chip. Built‐in self‐test (BIST) reduces the need for external support for testing. This paper proposes a new static BIST structure for testing both A/D and D/A converters. By sharing test circuitry, the proposed BIST reduces the hardware overhead. Furthermore, test time can also be reduced using the simultaneous test strategy of the proposed BIST. The proposed method can be applied in various A/D and D/A converter resolutions and analog signal swing ranges. Simulation results are presented to validate the proposed method by showing how linearity errors are detected in different situations.     

Novel hybrid D/A structures for high-resolution SAR ADCs—analysis, modeling and realization

An intermittent-sleeping C-R hybrid D/A structure, a resistor-reusing R-C hybrid D/A structure and an R-C-R combined D/A structure are researched with theoretical analysis and Matlab modeling in this paper. The switching power and passive components' matching requirement of these D/A structures are discussed in detail. Three SAR ADCs with these three novel structures are realized based on SMIC 0.18 μm CMOS, SMIC 90 nm CMOS and UMC 90 nm CMOS, respectively. The theoretical analysis, modeling verification and circuit realization proves the applicability of these three D/A conversion networks to high-resolution SAR ADCs.     

基于单片机和555定时器的A/D转换器设计

为克服在A/D转换中输入电压范围窄的问题,介绍了一种采用单片机AT89C51和NE555定时器构成的A/D转换器.详细分析了其工作原理和A/D转换的特性.该A/D转换器对低频输入信号在较高电压范围内具有一定的实用价值.     

Balancing Intermolecular Interactions between Acceptors and Donor/Acceptor for Efficient Organic Photovoltaics

Promoted by uninterrupted materials and device innovation, organic solar cells have achieved impressive development. However, the complicated intermolecular interactions inside active layers are less understood. Herein, the intermolecular interactions are studied from the dual perspectives of acceptor/acceptor (A/A) and donor/acceptor (D/A), and how these interactions synergistically control the final efficiencies. Three small molecular acceptors (SMAs) are designed with different end-caps, which manipulate the crystallinity and electrostatic potential (ESP) distributions of acceptors, and accordingly, the A/A and D/A intermolecular interactions. The results show that SMA LA17 with low A/A interactions exhibits inferior performance around 12%, owing to its strong D/A interaction with donor PM6, which shapes too miscible morphology and increases charge recombination. Instead, LA16 with strong A/A interactions and moderate D/A interactions delivers improved bulk-heterojunction (BHJ) networks, and therefore, enhances charge transport and diminishes geminate or trap-assisted charge recombination. Consequently, PM6:LA16 records the competitive efficiency of up to 13.74% among the three systems. Therefore, this study deepens the synergistic or balancing effect of the D/A and A/A interactions on BHJ blends for efficient organic solar cells.     

A/D转换技术的应用与发展

首先分别介绍了当前六大模数转换技术的工作原理、电路结构、性能特点及应用领域,通过从转换速率、转换精度、分辨率、功耗、价格、面积等指标进行分析,将物理结构的设计与实际性能结合比较,总结出各自适合的应用领域.然后,根据对现有模数转换技术特点的分析及实际应用中对模数转换器性能的要求,对当前A/D转换技术向着高性能、低功耗、结构简单方向发展的趋势进行了预测.     

模拟/数字转换技术及其发展趋势

数字技术的飞速发展，使A／D转换器变得越来越重要。文章扼要叙述了A／D转换器的历史发展过程，列举了几种当前流行的A／D转换器，包括全并行、两步型、插值折叠型、流水线型、逐次逼近型、∑-△型A／D转换器；具体介绍了它们的结构、工作原理、性能特点、应用场合以及最新的研究进展，并对它们的性能进行了比较；最后，讨论了A／D转换器的发展趋势。     

高速A/D转换器技术及其产品发展研究

介绍了数据转换器的市场规模及其发展趋势，高速A／D转换器的主要研发公司及其代表产品水平，主流产品的电路结构和工艺技术以及技术发展趋势。     

高速A/D转换器AD9481原理及应用

在采集速率要求高的场合,A/D转换器的性能起关键作用。AD9481是模拟器件公司的8位250 MHz采样率A/D转换器。介绍了AD9481的主要性能、引脚构成、内部结构、工作时序,提供了参考设计电路。最后给出了基于FPGA控制转换的原理框图。为基于AD9481的高速A/D转换电路设计提供了参考依据。