德州儀器(TI)通過多種不同的處理工藝提供了寬范圍的運(yùn)算放大器產(chǎn)品，其類型包括了高精度、微功耗、低電壓、高電壓、高速以及軌至軌。TI還開發(fā)了業(yè)界最大的低功耗及低電壓運(yùn)算放大器產(chǎn)品選集，其設(shè)計(jì)特性可滿足寬范圍的多種應(yīng)用。為使您的選擇流程更為輕松，我們提供了一個(gè)交互式的在線運(yùn)算放大器參數(shù)搜索引擎——AMPLIFIER.ti.com/search，可供您鏈接至各種不同規(guī)格的運(yùn)算放大器。設(shè)計(jì)考慮因素為某項(xiàng)應(yīng)用選擇最佳的運(yùn)算放大器所要考慮的因素涉及到多個(gè)相關(guān)聯(lián)的需求。為此，設(shè)計(jì)人員必須經(jīng)常權(quán)衡彼此矛盾的尺寸、成本、性能等指標(biāo)因素。即使是資歷最老的工程師也可能會(huì)為此而苦惱，但您大可不必如此。緊記以下的幾點(diǎn)，您將會(huì)發(fā)現(xiàn)選擇范圍將很快的縮小至可掌控的少數(shù)幾個(gè)。電源電壓(VS)——選擇表中包括了低電壓（最小值低于2.7V）及寬電壓范圍（最小值高于5V）的部分。其余運(yùn)放的選擇類型（例如精密），可通過快速查驗(yàn)供電范圍欄來適當(dāng)選擇。當(dāng)采用單電源供電時(shí)，應(yīng)用可能需要具有軌至軌(rail-to-rail)性能，并考慮精度相關(guān)的參數(shù)。精度——主要與輸入偏移電壓(VOS)相關(guān)，并分別考慮隨溫度漂移、電源抑制比(PSRR)以及共模抑制比(CMRR)的變化。精密(precision)一般用于描述具有低輸入偏置電壓及低輸入偏置電壓溫度漂移的運(yùn)算放大器。微小信號(hào)需要高精度的運(yùn)算放大器，例如熱電偶及其它低電平的傳感器。高增益或多級(jí)電路則有可能需求低偏置電壓。
標(biāo)簽： 放大器 數(shù)據(jù)轉(zhuǎn)換器 選擇指南
上傳時(shí)間： 2013-11-25
上傳用戶：1966649934
Abstract: We can apply a BiCMOS integrated circuit with only resistors and no transistors to solve adifficult design problem. The mythically perfect operational AMPLIFIER's gain and temperature coefficient aredependent on external resistor values. Maxim precision resistor arrays are manufactured together on asingle die and then automatically trimmed, to ensure close ratio matching. This guarantees that theoperational AMPLIFIER (op amp) gain and temperature coefficient are predictable and reliable, even withlarge production volumes.
上傳時(shí)間： 2014-11-30
上傳用戶：ynzfm
DC/DC 升壓IC：The FP6291 is a current mode boost DC-DC converter. Its PWM circuitry with built-in 0.25 Ω power MOSFET make this regulator highly power efficient. The internal compensation network also minimizes as much as 6 external component counts. The non-inverting input of error AMPLIFIER connects to a 0.6V precision reference voltage and internal soft-start function can reduce the inrush current. The FP6291 is available in the SOT23-6L package and provides space-saving PCB for the application fields.
上傳時(shí)間： 2013-11-07
上傳用戶：3294322651
Avalanche photodiodes (APDs) are widely utilized in laserbased fiberoptic systems to convert optical data intoelectrical form. The APD is usually packaged with a signalconditioning AMPLIFIER in a small module. An APD receivermodule and attendant circuitry appears in Figure 1. TheAPD module (figure right) contains the APD and a transimpedance(e.g., current-to-voltage) AMPLIFIER. An opticalport permits interfacing fiberoptic cable to the APD’sphotosensitive portion. The module’s compact constructionfacilitates a direct, low loss connection between theAPD and the AMPLIFIER, necessary because of the extremelyhigh speed data rates involved
標(biāo)簽： 雪崩 光電二極管 偏置電壓 電流檢測(cè)電路
上傳時(shí)間： 2013-10-25
上傳用戶：brain kung
該系統(tǒng)由單片機(jī)89S52控制模塊，程控寬帶放大模塊，整形模塊，F(xiàn)PGA內(nèi)頻率、相位差測(cè)量模塊等構(gòu)成，采用等精度測(cè)頻法測(cè)出頻率和周期，可測(cè)量有效值為0.01～5V，頻率范圍1Hz～20MHz信號(hào)的頻率、周期信號(hào)，精度高達(dá)10-6。采用計(jì)數(shù)法測(cè)量相位差，該系統(tǒng)可測(cè)量有效值0.5～5V，頻率10Hz～100kHz信號(hào)的相位差，精度為1°。系統(tǒng)功能由按鍵控制，測(cè)量結(jié)果實(shí)時(shí)顯示，人機(jī)界面友好。 Abstract: The system consists of the following functional blocks:89S52microcontroller controlling module,programmable AMPLIFIER module,comparator module,frequency and phase difference testing module in the FPGA.The system use the equal accuracy frequency-examining technique it measures frequency and circle of signal which its ranges is from1Hz to20MHz and the amplitude of which its range is from0.01Vrms to5Vrms,precision is up to10-6.Using of count method,the system detects the phase difference of signal,the amplitude of whic its range is from0.5Vrms to5Vrms and the frequency of which its ranges is from10Hz to100kHz,precision is up to1°,The system functions is controlled by certain keys,measurement results are displayed in real-time and it is friendly interface.
標(biāo)簽： 89S52 單片機(jī) 多功能 計(jì)數(shù)器
上傳時(shí)間： 2013-11-04
上傳用戶：CHINA526
介紹了以AVR單片機(jī)ATmega16為核心，采用前端信號(hào)調(diào)理電路、程控增益放大器以及波形顯示LCD（GDM12864A）實(shí)現(xiàn)的一個(gè)簡易示波器。并給出該系統(tǒng)設(shè)計(jì)的硬件和軟件設(shè)計(jì)方案。 Abstract: Abstract:This paper introduces an easy digital storage oscilloscope based on the AVR microcontroller ATmega16,especially emphasizes on the software design and the hardware design which contains signal processing circuit,gain-programmed AMPLIFIER circuit and LCD’s interface circuit and so on.
上傳時(shí)間： 2013-10-13
上傳用戶：ccccccc
為了解決磁放大器性能測(cè)試過程中，需要對(duì)其供給不同數(shù)值恒定電流的問題，設(shè)計(jì)了一種基于DAC7512和單片機(jī)的數(shù)控恒流源系統(tǒng)。該系統(tǒng)采用AT89C51作為主控器件，將計(jì)算機(jī)發(fā)送的電流控制字命令轉(zhuǎn)換為D/A轉(zhuǎn)換器控制字，通過模擬SPI通信接口，寫D/A控制字到DAC7512，從而控制其輸出相應(yīng)數(shù)字電壓值，經(jīng)差動(dòng)縮放電路、電壓/電路變換電路和功率驅(qū)動(dòng)電路，最后輸出恒定電流。實(shí)驗(yàn)結(jié)果表明，恒流源輸出電流調(diào)節(jié)范圍為-45~+45 mA、精度為±0.1 mA，分辨率達(dá)0.024 4 mA，具有應(yīng)用靈活，外圍電路簡單，可靠性高的特點(diǎn)。該數(shù)控直流恒流源也可為相關(guān)產(chǎn)品的測(cè)試系統(tǒng)研發(fā)提供參考。 Abstract: In order to solve the need to supply different values constant current for the magnetic AMPLIFIER in testing process， numerical control constant current source system was designed based on DAC7512 chip and microcontroller technology. The system used the AT89C51 as the main chip， which can convert the current control word from computer into to D/A control words. And the system wrote D/A control word into the DAC7512 chip to control the output voltage value by the SPI communication interface， which can output corresponding constant current figures by scaling circuit， the V/I converter and power drive circuit. Experimental results show that the current source output current adjustment range is -45~+45mA， accuracy is ± 0.1mA， and resolution ratio is 0.024 4mA
標(biāo)簽： 7512 DAC 數(shù)控直流 恒流源
上傳時(shí)間： 2014-12-27
上傳用戶：invtnewer
為降低成本和解決現(xiàn)有膜片鉗放大器系統(tǒng)中PC機(jī)的干擾問題，研究了一種基于單片機(jī)的膜片鉗放大器小系統(tǒng)。該系統(tǒng)采用ADI公司生產(chǎn)的ADuC841作為控制核心，并且配置相應(yīng)的液晶顯示模塊LCM3202401。模擬電路部分采用高輸入阻抗的AD8627實(shí)現(xiàn)微電流信號(hào)的采集，并由后級(jí)電路進(jìn)行信號(hào)的放大和電阻電容的補(bǔ)償。它具有硬件電路簡單、體積小、使用方便的特點(diǎn)。既可以單獨(dú)作為小系統(tǒng)實(shí)現(xiàn)采集和顯示，也可以通過紅外方式和PC機(jī)進(jìn)行通訊，在PC機(jī)上進(jìn)行信號(hào)的處理。 Abstract: In order to reduce cost and resolve the interferential problem with PC in existing patch clamp AMPLIFIERs, a small patch clamp AMPLIFIER system design based on microcontroller is studied. It adopts a new high performance microconverter ADuC841 by the ADI as the control core in the system, configuring a liquid crystal module LCM3202401. In the analog circuit, AD8627 with high input impedance is used to detect the low current，signal magnification, as well as resistance and capacitance compensation are accomplished by subsequent circuits. It has the advantage of simple hardware circuit design, small volume and convenient operation. It can either be used as an independent system to measure and show signal detected or transmit to PC by infrared ray.
上傳時(shí)間： 2013-11-06
上傳用戶：yy_cn
利用AT89C51型單片機(jī)定時(shí)和中斷功能，配以LM386型音頻功率放大器，構(gòu)成了作息號(hào)音自動(dòng)播放器，為學(xué)校和機(jī)關(guān)管理提供方便。 Abstract: Using timing and interrupt function of the AT89C51 single-chip microcomputer and the LM386 audio power AMPLIFIER.It is constituted the automatic bugle player.This player facilitates the institution and the school daily management.
標(biāo)簽： 51單片機(jī) 自動(dòng) 播放器
上傳時(shí)間： 2013-10-10
上傳用戶：wivai
Features• Complete DTMF Receiver• Low power consumption• Internal gain setting AMPLIFIER• Adjustable guard time• Central office quality• Power-down mode• Inhibit mode• Backward compatible withMT8870C/MT8870C-1Applications• Receiver system for British Telecom (BT) orCEPT Spec (MT8870D-1)• Paging systems• Repeater systems/mobile radio• Credit card systems• Remote control• Personal computers• Telephone answering machine
上傳時(shí)間： 2013-11-20
上傳用戶：mpquest
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