運算放大器是模擬系統(tǒng)的主要構(gòu)件。它們可以提供增益、緩沖、濾波、混頻和多種運算功能。在系統(tǒng)結(jié)構(gòu)圖中，運算放大器用三角形表示，有五個接點：正極電源、負極電源、正極輸入、負極輸入和輸出，如圖1（所有圖片均在本文章最后）所示。電源腳用來為器件加電。它們可以連接 +/- 5V 電源，或在特殊考慮的情況下，連接 +10V 電源并接地。輸入與輸出之間的關(guān)系直截了當：Vout = A (Vin+ - Vin-)即輸出電壓等于放大器增益 (A) 乘以輸入電壓之差。
標簽： 運算放大器 模擬系統(tǒng) 構(gòu)件
上傳時間： 2013-12-21
上傳用戶：邶刖
Abstract: This tutorial discusses proper printed-circuit board (PCB) grounding for mixed-signal designs. Formost applications a simple method without cuts in the ground plane allows for successful PCB layouts withthis kind of IC. We begin this document with the basics: where the current flows. Later, we describe how toplace components and route signal traces to minimize problems with crosstalk. Finally, we move on toconsider power supply-currents and end by discussing how to extend what we have learned to circuits withmultiple mixed-signal ICs.
上傳時間： 2013-11-04
上傳用戶：pol123
Abstract: This application note describes how to design boost converters using the MAX17597 peakcurrent-mode controller. Boost converters can be operated in discontinuous conduction mode (DCM) orcontinuous conduction mode (CCM). This operating mode can affect the component choices, stress levelin power devices, and controller design. Formulas for calculating component values and ratingsare alsopresented.
標簽： 17597 MAX 如何設(shè)計 升壓轉(zhuǎn)換器
上傳時間： 2013-11-16
上傳用戶：zcs023047
Abstract: This application note describes how sampling clock jitter (time interval error or "TIE jitter") affectsthe performance of delta-sigma digital-to-analog converters (DACs). New insights explain the importanceof separately specifying low-frequency (< 2x passband frequency) and high-frequency or wideband (> 2xpassband frequency) jitter tolerance in these devices. The article also provides an application example ofa simple highly jittered cycle-skipped sampling clock and describes a method for generating a properbroadband jittered clock. The document then goes on to compare Maxim's audio DAC jitter tolerance tocompetitor audio DACs. Maxim's exceptionally high jitter tolerance allows very simple and low-cost sampleclock implementations.
標簽： DAC 音頻 數(shù)模轉(zhuǎn)換器 抖動
上傳時間： 2013-10-25
上傳用戶：banyou
The MAX2870 ultra-wideband phase-locked loop (PLL) and voltagecontrol oscillator (VCO) can operate in both integer-N and fractional-Nmodes, similar to the Analog Devices ADF4350 wideband synthesizer.This application note compares the MAX2870 and ADF4350 registers andloop filter design in detail. Users who already familiar with ADF4350 canuse this application note as a quick design reference.
標簽： 寄存器 環(huán)路濾波器
上傳時間： 2014-12-23
上傳用戶：變形金剛
Abstract: A digital RF modulator, an integrated solution that satisfies stringent DOCSIS RF-performancerequirements, takes advantage of modern technologies like high-performance wideband digital-to-analogconversion and CMOS technology scaling. This application note describes the concept and advantages ofa digital quadrature amplitude modulation (QAM) modulator that uses the direct-RF architecture to enablea cable access platform (CCAP) system.
上傳時間： 2013-10-20
上傳用戶：drink！
針對互聯(lián)網(wǎng)領(lǐng)域版權(quán)保護面臨的挑戰(zhàn)，介紹了一種新的版權(quán)公共服務(wù)新模式：數(shù)字版權(quán)標識符體系及其總體技術(shù)框架，并分析了基于數(shù)字指紋的數(shù)字版權(quán)標識技術(shù)，該技術(shù)對于數(shù)字版權(quán)標識符體系中數(shù)字版權(quán)監(jiān)測取證功能的實現(xiàn)具有一定的意義。
標簽： 數(shù)字指紋 數(shù)字版權(quán) 標識
上傳時間： 2014-12-23
上傳用戶：suoyuan
Abstract: Quartz crystals are mechanical resonators with piezoelectric properties. The piezoelectricproperties (electric potential across the crystal is proportional to mechanical deformation) allow their use
標簽： 晶體振蕩器
上傳時間： 2013-10-17
上傳用戶：時代將軍
Abstract: Most magnetic read head data sheets do not fully specify the frequency-dependent components andare often vague when specifying other key parameters. In some cases, the specifications of two very similarheads from two different manufacturers might be quite different in terms of parameters specified and omitted.The limitations in the data sheets make designing an optimum card reading system unnecessarily difficult andtime consuming. This document outlines a strategy to overcome the above shortcomings and offers guidelinesto overcome the noise issues.
標簽： MCR 噪聲環(huán)境 磁卡讀寫器
上傳時間： 2013-11-13
上傳用戶：dysyase
The MAX5713/MAX5714/MAX5715 4-channel, low-power,8-/10-/12-bit, voltage-output digital-to-analog converters(DACs) include output buffers and an internal referencethat is selectable to be 2.048V, 2.500V, or 4.096V. TheMAX5713/MAX5714/MAX5715 accept a wide supplyvoltage range of 2.7V to 5.5V with extremely low power(3mW) consumption to accommodate most low-voltageapplications. A precision external reference input allowsrail-to-rail operation and presents a 100kI (typ) load toan external reference.
標簽： MAX 5713 5715 數(shù)據(jù)資料
上傳時間： 2013-12-23
上傳用戶：ArmKing88
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