Sensing and/or controlling current flow is a fundamental requirement in many electronics systems, and the tech-niques to do so are as diverse as the applications them-selves. This Application Note compiles solutions to cur-rent sensing problems and organizes the solutions by general application type. These CIRCUITs have been culled from a variety of Linear Technology documents
標(biāo)簽： 電流檢測(cè)電路
上傳時(shí)間： 2013-10-22
上傳用戶：moshushi0009
Demonstration circuit 1562A is an engineering toolto design and evaluate the LTC699X-X family ofTimerBlox CIRCUITs. The center section of the boardcontains a pre-configured TimerBlox function.DC1562A comes in twelve timing function variationsas outlined in Table 1.Surrounding the center board is a ”playground”prototyping area. The prototyping area has padsfor Dip-8, S8, MS8, or S6 packages with breadboarding connections to each pin and two convenientpower buses and ground bus surrounding theentire area. This area is for conditioning signals tocontrol the timer function and for adding loads controlled in time.
標(biāo)簽： 6994 LTC PCB 參考設(shè)計(jì)
上傳時(shí)間： 2013-10-18
上傳用戶：如果你也聽說
針對(duì)煤礦井下調(diào)度及緊急救援系統(tǒng)的需求，以DTMF編解碼模塊為核心，設(shè)計(jì)了具有自動(dòng)撥號(hào)功能的新型電話系統(tǒng)。該系統(tǒng)利用MT8880對(duì)DTMF信號(hào)的編解碼功能實(shí)現(xiàn)一鍵撥號(hào)和遠(yuǎn)程設(shè)置，通過檢測(cè)振鈴和忙音信號(hào)，完成自動(dòng)摘機(jī)和掛機(jī)過程，配合AGC等外圍電路達(dá)到話音清晰流暢的效果。 Abstract: To meet the demand for mine scheduling and emergency rescue system， with using DTMF signal codec as the core， a new telephone system was designed with automatic dialing function. In the system， the DTMF signal encoding and decoding function of MT8880 was used to achieve one-touch dialing and remote setting. The circuit detects the ringing and busy signal， and then completes automatic off-hook and hangup. With AGC(Automatic Gain Control) and other peripheral CIRCUITs， the voice was regulated to a clear and smooth effect.
標(biāo)簽： 8880 MT 撥號(hào)電話 系統(tǒng)設(shè)計(jì)
上傳時(shí)間： 2014-11-18
上傳用戶：ly1994
為深入了解基于UC3854A控制的PFC變換器中的動(dòng)力學(xué)特性，研究系統(tǒng)參數(shù)變化對(duì)變換器中分岔現(xiàn)象的影響，在建立Boost PFC變換器雙閉環(huán)數(shù)學(xué)模型的基礎(chǔ)上，用Matlab軟件對(duì)變換器中慢時(shí)標(biāo)分岔及混沌等不穩(wěn)定現(xiàn)象進(jìn)行了仿真。在對(duì)PFC變換器中慢時(shí)標(biāo)分岔現(xiàn)象仿真的基礎(chǔ)上，分析了系統(tǒng)參數(shù)變化對(duì)分岔點(diǎn)的影響，并進(jìn)行了仿真驗(yàn)證。仿真結(jié)果清晰地顯示了輸入整流電壓的幅值變化對(duì)系統(tǒng)分岔點(diǎn)的影響。 Abstract: In order to better understand the dynamics characteristic of power factor correction converter based on UC3854A， and make the way that parameters change influences the bifurcation phenomena of the system clearly. The math model of the two closed loop CIRCUITs to the Boost PFC （Power Factor Correction） converter controller was built. Then， with the help of Matlab， the simulation for nonlinear phenomena such as chaos and slow-scale bifurcation in the PFC converter was made. Finally the factors that have influence to the phenomenon of bifurcation under slow-scale in PFC converter were analyzed. The simulation results clearly show the parameters change influences the bifurcation point of the system.
上傳時(shí)間： 2013-10-17
上傳用戶：杜瑩12345
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(jiǎn)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
The SN65LBC170 and SN75LBC170 aremonolithic integrated CIRCUITs designed forbidirectional data communication on multipointbus-transmission lines. Potential applicationsinclude serial or parallel data transmission, cabledperipheral buses with twin axial, ribbon, ortwisted-pair cabling. These devices are suitablefor FAST-20 SCSI and can transmit or receivedata pulses as short as 25 ns, with skew lessthan 3 ns.These devices combine three 3-state differentialline drivers and three differential input linereceivers, all of which operate from a single 5-Vpower supply.The driver differential outputs and the receiverdifferential inputs are connected internally to formthree differential input/output (I/O) bus ports thatare designed to offer minimum loading to the buswhenever the driver is disabled or VCC = 0. Theseports feature a wide common-mode voltage rangemaking the device suitable for party-lineapplications over long cable runs.
上傳時(shí)間： 2013-10-13
上傳用戶：ytulpx
MCP3905/6 電能表集成電路（Intergrated CIRCUITs，IC）為單相家用電表設(shè)計(jì)提供有功功率測(cè)量。這些器件包含符合國際電工委員會(huì)（International Electrotechnical Commission，IEC）所要求的特性，如空載門限和啟動(dòng)電流。此外， MCP3905/6 電表參考設(shè)計(jì)還給出了根據(jù)IEC標(biāo)準(zhǔn)的要求通過EMC抗干擾的系統(tǒng)級(jí)設(shè)計(jì)的例子。 本應(yīng)用筆記中使用的電表參考設(shè)計(jì)演示板進(jìn)行了IEC 認(rèn)證要求的EMC 測(cè)試。這些測(cè)試由第三方進(jìn)行，測(cè)試結(jié)果見本應(yīng)用筆記的末尾。
標(biāo)簽： 3905 MCP IEC 標(biāo)準(zhǔn)
上傳時(shí)間： 2013-10-17
上傳用戶：ysjing
The outputs of the PCA9518 are immediately available as soon as there is a voltage present on thesupply >~1V and behave as described above. The power-on reset of the PCA9518A keeps the outputsturned off during power-up and maintains the high impedance of the outputs throughout the power-upcycle. There is an additional built-in delay after power-up that allows the analog CIRCUITs to stabilize beforethe part is activated.
標(biāo)簽： Replacement 9518 NXP PCA
上傳時(shí)間： 2013-10-26
上傳用戶：13817753084
The ISO7220 and ISO7221 are dual-channel digital isolators. To facilitate PCB layout, the channels are orientedin the same direction in the ISO7220 and in opposite directions in the ISO7221. These devices have a logic inputand output buffer separated by TI’s silicon-dioxide (SiO2) isolation barrier, providing galvanic isolation of up to4000 V. Used in conjunction with isolated power supplies, these devices block high voltage, isolate grounds, andprevent noise currents on a data bus or other CIRCUITs from entering the local ground and interfering with ordamaging sensitive circuitry.
標(biāo)簽： ISOLATORS DIGITAL DUAL
上傳時(shí)間： 2013-10-24
上傳用戶：hbsunhui
摘要：本水位監(jiān)測(cè)報(bào)警器使用5V低壓直流電源（也可以用3節(jié)5號(hào)電池代替）就可以對(duì)5~15厘米的水位進(jìn)行監(jiān)測(cè)，用LED顯示和數(shù)碼管顯示水位，并可以對(duì)不再此范圍內(nèi)的水位發(fā)出報(bào)警。主要采用CD4066、74LS86、74LS32、CD4511芯片，再加上數(shù)碼管、蜂鳴器、發(fā)光二極管、電阻這些器件組成一個(gè)簡(jiǎn)單而靈敏的監(jiān)測(cè)報(bào)警電路，操作簡(jiǎn)單，接通電源即可工作。因?yàn)榇蟛糠蛛娐凡捎脭?shù)字電路，所以本水位監(jiān)測(cè)報(bào)警器還具有耗能低、準(zhǔn)確性高的特點(diǎn)。關(guān)鍵字：譯碼電路 報(bào)警電路 監(jiān)測(cè)電路 Abstract: The water level alarm monitoring the use of 5 V low-voltage DC power (can also use three batteries replaced on the 5th) will be able to 5 to 15 centimeters of water level monitoring, with LED display and digital display of water level, and this can no longer Within the scope of a water level alarm. Mainly CD4066, 74LS86, 74LS32, CD4511 chips, coupled with digital control, buzzer, light-emitting diode, the resistance of these devices composed of a simple and sensitive monitoring alarm CIRCUITs. Because the majority of CIRCUITs using digital circuitry, so the water level monitored alarm system also has low energy consumption, high accuracy of the characteristics. Keyword: Decoding circuit alarm circuit monitoring circuit
標(biāo)簽： 水位 監(jiān)測(cè)報(bào)警 系統(tǒng)原理
上傳時(shí)間： 2013-11-05
上傳用戶：王慶才
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