Photodiodes can be broken into two categories: largearea photodiodes with their attendant high capacitance(30pF to 3000pF) and smaller area photodiodes withrelatively low capacitance (10pF or less). For optimalsignal-to-noise performance, a transimpedance amplifi erconsisting of an inverting op amp and a feedback resistoris most commonly used to convert the photodiode currentinto voltage. In low noise amplifi er design, large areaphotodiode amplifi ers require more attention to reducingop amp input voltage noise, while small area photodiodeamplifi ers require more attention to reducing op amp inputcurrent noise and parasitic capacitances.
上传时间： 2013-10-28
上传用户：hanbeidang
The 14-bit LTC2351-14 is a 1.5Msps, low power SARADC with six simultaneously sampled differential inputchannels. It operates from a single 3V supply and featuressix independent sample-and-hold amplifi ers and a singleADC. The single ADC with multiple S/HAs enables excellentrange match (1mV) between channels and channel-tochannelskew (200ps).
上传时间： 2014-12-23
上传用户：天诚24
Recent advances in low voltage silicon germaniumand BiCMOS processes have allowed the design andproduction of very high speed amplifi ers. Because theprocesses are low voltage, most of the amplifi er designshave incorporated differential inputs and outputs to regainand maximize total output signal swing. Since many lowvoltageapplications are single-ended, the questions arise,“How can I use a differential I/O amplifi er in a single-endedapplication?” and “What are the implications of suchuse?” This Design Note addresses some of the practicalimplications and demonstrates specifi c single-endedapplications using the 3GHz gain-bandwidth LTC6406differential I/O amplifi er.
上传时间： 2013-11-23
上传用户：rocketrevenge
Linear Technology’s High Frequency Product lineupincludes a variety of RF I/Q modulators. The purpose ofthis application note is to illustrate the circuits requiredto interface these modulators with several popular D/Aconverters. Such circuits typically are required to maximizethe voltage transfer from the DAC to the baseband inputsof the modulator, as well as provide some reconstructionfi ltering.
上传时间： 2013-10-19
上传用户：FreeSky
Control systems are becoming increasingly dependent on digital processing and so require sensors able to provide direct digital inputs. Sensors based on time measurement, having outputs based on a frequency or phase, have an advantage over conventional analogue sensors in that their outputs can be measured directly in digital systems by pulse counting.
上传时间： 2013-10-08
上传用户：wuyuying
This application note describes a Linear Technology "Half-Flash" A/D converter, the LTC1099, being connected to a 256 element line scan photodiode array. This technology adapts itself to handheld (i.e., low power) bar code readers, as well as high resolution automated machine inspection applications..
上传时间： 2013-11-21
上传用户：lchjng
Low power operation of electronic apparatus has becomeincreasingly desirable. Medical, remote data acquisition,power monitoring and other applications are good candidatesfor battery driven, low power operation. Micropoweranalog circuits for transducer-based signal conditioningpresent a special class of problems. Although micropowerICs are available, the interconnection of these devices toform a functioning micropower circuit requires care. (SeeBox Sections, “Some Guidelines for Micropower Designand an Example” and “Parasitic Effects of Test Equipmenton Micropower Circuits.”) In particular, trade-offs betweensignal levels and power dissipation become painful whenperformance in the 10-bit to 12-bit area is desirable.
上传时间： 2013-10-22
上传用户：rocketrevenge
模拟集成电路的设计与其说是一门技术，还不如说是一门艺术。它比数字集成电路设计需要更严格的分析和更丰富的直觉。严谨坚实的理论无疑是严格分析能力的基石，而设计者的实践经验无疑是诞生丰富直觉的源泉。这也正足初学者对学习模拟集成电路设计感到困惑并难以驾驭的根本原因。.美国加州大学洛杉机分校(UCLA)Razavi教授凭借着他在美国多所著名大学执教多年的丰富教学经验和在世界知名顶级公司(AT&T，Bell Lab，HP)卓著的研究经历为我们提供了这本优秀的教材。本书自2000午出版以来得到了国内外读者的好评和青睐，被许多国际知名大学选为教科书。同时，由于原著者在世界知名顶级公司的丰富研究经历，使本书也非常适合作为CMOS模拟集成电路设计或相关领域的研究人员和工程技术人员的参考书。... 本书介绍模拟CMOS集成电路的分析与设计。从直观和严密的角度阐述了各种模拟电路的基本原理和概念，同时还阐述了在SOC中模拟电路设计遇到的新问题及电路技术的新发展。本书由浅入深，理论与实际结合，提供了大量现代工业中的设计实例。全书共18章。前10章介绍各种基本模块和运放及其频率响应和噪声。第11章至第13章介绍带隙基准、开关电容电路以及电路的非线性和失配的影响，第14、15章介绍振荡器和锁相环。第16章至18章介绍MOS器件的高阶效应及其模型、CMOS制造工艺和混合信号电路的版图与封装。 1 Introduction to Analog Design 2 Basic MOS Device Physics 3 Single-Stage Amplifiers 4 Differential Amplifiers 5 Passive and Active Current Mirrors 6 Frequency Response of Amplifiers 7 Noise 8 Feedback 9 Operational Amplifiers 10 Stability and Frequency Compensation 11 Bandgap References 12 Introduction to Switched-Capacitor Circuits 13 Nonlinearity and Mismatch 14 Oscillators 15 Phase-Locked Loops 16 Short-Channel Effects and Device Models 17 CMOS Processing Technology 18 Layout and Packaging
上传时间： 2014-12-23
上传用户：杜莹12345
A light-emitting diode (LED) is a semiconductor device that emits narrow-spectrum incoherent light when forward-biased.The color of the emitted light depends on the chemical composition of the semiconductor material used, and can benear-ultraviolet, visible or infrared. LEDs are more prevalent today than ever before, replacing traditional incandescent andfluorescent bulbs in many lighting applications. Incandescents use a heated filament, are subject to breakage and burnoutand operate at a luminous efficiency of 2% to 4%. Fluorescents are more efficient, at 7% to 12%, but require highdrive voltage and contain mercury, a toxic substance that may be eventually banned in certain countries. LEDs, however,produce light directly through electroluminescence, operate at low voltage and can deliver over 20% luminous efficiency.
上传时间： 2013-11-07
上传用户：xiaoyuer
Abstract: This application note illustrates an intermediate 8V switching power supply for an automotive radio and infotainment system.The design withstands the complete automotive input voltage range (including cold crank and load dump conditions), assuring a stable8V supply for common subsystems such as a CD driver, LCDs, and a radio module in modern infotainment systems. To avoiddisturbance in the AM and FM bands, the switching power supply runs at a fixed frequency of 2MHz, enabling an ideal solution forradio systems.
上传时间： 2013-11-20
上传用户：feitian920
