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(biāo)簽: DAC 音頻 數(shù)模轉(zhuǎn)換器 抖動(dòng)
上傳時(shí)間: 2013-10-25
上傳用戶:banyou
Abstract: For many first-time users, finding the right logger that meets their needs can be a challenging task. In simple
上傳時(shí)間: 2014-01-19
上傳用戶:縹緲
Abstract: A laser module designer can use a fixed resistor, mechanical pot, digital pot, or a digital-to-analogconverter (DAC) to control the laser driver's modulation and bias currents. The advantages of a programmablemethod (POT or DAC) are that the manufacturing process can be automated and digital control can be applied(e.g., to compensate for temperature). Using POTs can be a more simple approach than a DAC. There can be aslight cost advantage to using a POT, but this is usually not significant relative to other pieces of the design.Using a DAC can offer advantages, including improved linearity (translating to ease of software implementationand ability to hit the required accuracy), increased board density, a wider range of resolutions, a betteroptimization range, ease of use with a negative voltage laser driver, and unit-to-unit consistency
標(biāo)簽: POT DAC 應(yīng)用筆記 校準(zhǔn)
上傳時(shí)間: 2013-11-13
上傳用戶:ca05991270
Abstract: Using a DAC and a microprocessor supervisor, the system safety can be improved in industrial controllers, programmablelogiccontrollers (PLC), and data-acquisition systems. The analog output is set to zero-scale (or pin-programmable midscale) when amicroprocessor failure, optocoupler failure, or undervoltage condition occurs. A simple application is shown on how to implement thisfunction.
上傳時(shí)間: 2013-10-17
上傳用戶:sjb555
Abstract: Transimpedance amplifiers (TIAs) are widely used to translate the current output of sensors like photodiode-to-voltagesignals, since several circuits and instruments can only accept voltage input. An operational amplifier with a feedback resistor fromoutput to the inverting input is the most straightforward implementation of such a TIA. However, even this simple TIA circuit requirescareful trade-offs among noise gain, offset voltage, bandwidth, and stability. Clearly stability in a TIA is essential for good, reliableperformance. This application note explains the empirical calculations for assessing stability and then shows how to fine-tune theselection of the feedback phase-compensation capacitor.
標(biāo)簽: Transimpedance Stabilize Amplifier Your
上傳時(shí)間: 2013-11-13
上傳用戶:daoyue
Who has never experienced oscillations issues when using an operational amplifier? Opampsare often used in a simple voltage follower configuration. However, this is not the bestconfiguration in terms of capacitive loading and potential risk of oscillations.Capacitive loads have a big impact on the stability of operational amplifier-basedapplications. Several compensation methods exist to stabilize a standard op-amp. Thisapplication note describes the most common ones, which can be used in most cases.The general theory of each compensation method is explained, and based on this, specific
標(biāo)簽: 半導(dǎo)體 運(yùn)放 穩(wěn)定性
上傳時(shí)間: 2013-10-28
上傳用戶:chenbhdt
Highlights the LTC1062 as a lowpass filter in a phase lock loop. Describes how the loop's bandwidth can be increased and the VCO output jitter reduced when the LTC1062 is the loop filter. Compares it with a passive RC loop filter. Also discussed is the use of LTC1062 as simple bandpass and bandstop filter.
上傳時(shí)間: 2013-10-24
上傳用戶:chens000
Arduino 是一塊基于開放原始代碼的Simple i/o 平臺(tái),并且具有使用類似java,C 語(yǔ)言的開發(fā)環(huán)境。讓您可以快速 使用Arduino 語(yǔ)言與Flash 或Processing…等軟件,作出互動(dòng)作品。Arduino 可以使用開發(fā)完成的電子元件例如Switch 或Sensors 或其他控制器、LED、步進(jìn)電機(jī)或其他輸出裝置。Arduino 也可以獨(dú)立運(yùn)作成為一個(gè)可以跟軟件溝通的平臺(tái),例如說(shuō):flash processing Max/MSP VVVV 或其他互動(dòng)軟件… Arduino 開發(fā)IDE界面基于開放原始碼原則,可以讓您免費(fèi)下載使用開發(fā)出更多令人驚奇的互動(dòng)作品。 什么是Roboduino? DFRduino 與Arduino 完全兼容,只是在原來(lái)的基礎(chǔ)上作了些改進(jìn)。Arduino 的IO 使用的孔座,做互動(dòng)作品需要面包板和針線搭配才能進(jìn)行,而DFRduino 的IO 使用針座,使用我們的杜邦線就可以直接把各種傳感器連接到DFRduino 上。 特色描述 1. 開放原始碼的電路圖設(shè)計(jì),程式開發(fā)界面免費(fèi)下載,也可依需求自己修改!! 2. DFRduino 可使用ISP 下載線,自我將新的IC 程序燒入「bootloader」; 3. 可依據(jù)官方電路圖,簡(jiǎn)化DFRduino 模組,完成獨(dú)立云作的微處理控制器; 4. 可簡(jiǎn)單地與傳感器、各式各樣的電子元件連接(如:紅外線,超聲波,熱敏電阻,光敏電阻,伺服電機(jī)等); 5. 支援多樣的互動(dòng)程式 如: Flash,Max/Msp,VVVV,PD,C,Processing 等; 6. 使用低價(jià)格的微處理控制器(ATMEGA168V-10PI); 7. USB 接口,不需外接電源,另外有提供9VDC 輸入接口; 8. 應(yīng)用方面,利用DFRduino,突破以往只能使用滑鼠,鍵盤,CCD 等輸入的裝置的互動(dòng)內(nèi)容,可以更簡(jiǎn)單地達(dá)成單人或多人游戲互動(dòng)。 性能描述 1. Digital I/O 數(shù)字輸入/輸出端共 0~13。 2. Analog I/O 模擬輸入/輸出端共 0~5。 3. 支持USB 接口協(xié)議及供電(不需外接電源)。 4. 支持ISP 下載功能。 5. 支持單片機(jī)TX/RX 端子。 6. 支持USB TX/RX 端子。 7. 支持AREF 端子。 8. 支持六組PWM 端子(Pin11,Pin10,Pin9,Pin6,Pin5,Pin3)。 9. 輸入電壓:接上USB 時(shí)無(wú)須外部供電或外部5V~9V DC 輸入。 10.輸出電壓:5V DC 輸出和3.3V DC 輸出 和外部電源輸入。 11.采用Atmel Atmega168V-10PI 單片機(jī)。 12.DFRduino 大小尺寸:寬70mm X 高54mm。 Arduino開發(fā)板圖片
上傳時(shí)間: 2014-01-14
上傳用戶:909000580
Arduino,是一塊基于開放源代碼的USB接口Simple i/o接口板(包括12通道數(shù)字GPIO,4通道PWM輸出,6-8通道10bit ADC輸入通道),并且具有使用類似Java,C語(yǔ)言的IDE集成開發(fā)環(huán)境。 讓您可以快速使用Arduino語(yǔ)言與Flash或Processing…等軟件,作出互動(dòng)作品。 Arduino可以使用開發(fā)完成的電子元件例如Switch或sensors或其他控制器、LED、步進(jìn)馬達(dá)或其他輸出裝置。Arduino也可以獨(dú)立運(yùn)作成為一個(gè)可以跟軟件溝通的接口,例如說(shuō):flash、processing、Max/MSP、VVVV 或其他互動(dòng)軟件…。Arduino開發(fā)IDE接口基于開放源代碼原,可以讓您免費(fèi)下載使用開發(fā)出更多令人驚艷的互動(dòng)作品。 特色: 1、開放源代碼的電路圖設(shè)計(jì),程序開發(fā)接口免費(fèi)下載,也可依需求自己修改。 2、使用低價(jià)格的微處理控制器(ATMEGA8或ATmega128)。可以采用USB接口供電,不需外接電源。也可以使用外部9VDC輸入 3、Arduino支持ISP在線燒,可以將新的“bootloader”固件燒入ATmega8或ATmega128芯片。有了bootloader之后,可以通過(guò)串口或者USB to Rs232線更新固件。 4、可依據(jù)官方提供的Eagle格式PCB和SCH電路圖,簡(jiǎn)化Arduino模組,完成獨(dú)立運(yùn)作的微處理控制。可簡(jiǎn)單地與傳感器,各式各樣的電子元件連接(EX:紅外線,超音波,熱敏電阻,光敏電阻,伺服馬達(dá),…等) 5、支持多種互動(dòng)程序,如:Flash、Max/Msp、VVVV、PD、C、Processing……等 6、應(yīng)用方面,利用Arduino,突破以往只能使用鼠標(biāo),鍵盤,CCD等輸入的裝置的互動(dòng)內(nèi)容,可以更簡(jiǎn)單地達(dá)成單人或多人游戲互動(dòng)。
標(biāo)簽: Arduino
上傳時(shí)間: 2013-11-24
上傳用戶:bvdragon
Abstract: Nonideal cable dispersive effects can affect system performance. This application note discusses the twomain loss effects related to cables (skin-effect and dielectric losses), and presents a simple method of modeling thecable for use in standard SPICE simulators.
上傳時(shí)間: 2014-11-18
上傳用戶:wxnumen
蟲蟲下載站版權(quán)所有 京ICP備2021023401號(hào)-1