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Time-Delay

  • 高精度I2C實時時鐘的設計

    Abstract: This application note presents an overview of the operational characteristics of accurate I²C real-time clocks (RTCs),including the DS3231, DS3231M, and DS3232. It focuses on general application guidelines that facilitate use of device resources forpower management, I²C communication circuit configurations, and I²C characteristics relative to device power-up sequences andinitializations. Additional discussions on decoupling are provided to support developing strategies for mitigating power-supply pushingof device frequency.

    標簽: I2C 高精度 實時時鐘

    上傳時間: 2013-11-23

    上傳用戶:WMC_geophy

  • 遠程信息處理數字融合--如何應對新興標準和協議

    Digital convergence, in recent history, has been prevalentin the consumer equipment domain and the designengineers in this area have been struggling with a plethoraof emerging standards and protocols. What lessons can welearn from their struggle? The same dilemmas now existin in-vehicle telematics and infotainment systems but withthe added issues of extremes of temperature, safety,security, and time in market.

    標簽: 遠程信息處理 數字 協議 標準

    上傳時間: 2014-12-23

    上傳用戶:9牛10

  • STM32F10xxx設備中如何得到高精度ADC

    The STM32F10xxx microcontroller family embeds up to three advanced 12-bit ADCs (depending on the device) with a conversion time down to 1 μs. A self-calibration feature is provided to enhance ADC accuracy versus environmental condition changes.

    標簽: STM 32F F10 ADC

    上傳時間: 2014-12-23

    上傳用戶:eastimage

  • 諧振器論文精選.rar

    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.

    標簽: 諧振器 論文

    上傳時間: 2013-10-08

    上傳用戶:wuyuying

  • 二極管導通開關穩壓器引發的故障時間

      Most circuit designers are familiar with diode dynamiccharacteristics such as charge storage, voltage dependentcapacitance and reverse recovery time. Less commonlyacknowledged and manufacturer specifi ed is diode forwardturn-on time. This parameter describes the timerequired for a diode to turn on and clamp at its forwardvoltage drop. Historically, this extremely short time, unitsof nanoseconds, has been so small that user and vendoralike have essentially ignored it. It is rarely discussed andalmost never specifi ed. Recently, switching regulator clockrate and transition time have become faster, making diodeturn-on time a critical issue. Increased clock rates aremandated to achieve smaller magnetics size; decreasedtransition times somewhat aid overall effi ciency but areprincipally needed to minimize IC heat rise. At clock speedsbeyond about 1MHz, transition time losses are the primarysource of die heating.

    標簽: 二極管 導通 開關穩壓器

    上傳時間: 2013-10-10

    上傳用戶:誰偷了我的麥兜

  • LTC1099基于PC的數據采集板實現

    A complete design for a data acquisition card for the IBM PC is detailed in this application note. Additionally, C language code is provided to allow sampling of data at speed of more than 20kHz. The speed limitation is strictly based on the execution speed of the "C" data acquisition loop. A "Turbo" XT can acquire data at speeds greater than 20kHz. Machines with 80286 and 80386 processors can go faster than 20kHz. The computer that was used as a test bed in this application was an XT running at 4.77MHz and therefore all system timing and acquisition time measurements are based on a 4.77MHz clock speed.

    標簽: 1099 LTC 數據 采集板

    上傳時間: 2013-10-29

    上傳用戶:BOBOniu

  • Delta Sigma的ADC橋測量技術

      Sensors for pressure, load, temperature, acceleration andmany other physical quantities often take the form of aWheatstone bridge. These sensors can be extremely linearand stable over time and temperature. However, mostthings in nature are only linear if you don’t bend them toomuch. In the case of a load cell, Hooke’s law states that thestrain in a material is proportional to the applied stress—as long as the stress is nowhere near the material’s yieldpoint (the “point of no return” where the material ispermanently deformed).

    標簽: Delta Sigma ADC 測量技術

    上傳時間: 2013-11-13

    上傳用戶:墻角有棵樹

  • Analog Circuit Design in Porta

    •Founded in Jan. 08, 2001 in Shanghai, China.•Fabless IDH focused on Analog & Mixed Signal Chip design & marketing •Over 100 IC introduced.•Over 200 OEM Customer worldwide•ISO-9000 Certified•Distribution Channel in Taiwan, China & Japan To achieve 100% customer satisfactionby producing the technically advanced product with the best quality, on-time delivery and service. Leverages on proprietary process and world-class engineering team to develop innovative & high quality analog solutions that add value to electronics equipment.

    標簽: Circuit Analog Design Porta

    上傳時間: 2013-10-24

    上傳用戶:songnanhua

  • 高速電路傳輸線效應分析與處理

    隨著系統設計復雜性和集成度的大規模提高,電子系統設計師們正在從事100MHZ以上的電路設計,總線的工作頻率也已經達到或者超過50MHZ,有一大部分甚至超過100MHZ。目前約80% 的設計的時鐘頻率超過50MHz,將近50% 以上的設計主頻超過120MHz,有20%甚至超過500M。當系統工作在50MHz時,將產生傳輸線效應和信號的完整性問題;而當系統時鐘達到120MHz時,除非使用高速電路設計知識,否則基于傳統方法設計的PCB將無法工作。因此,高速電路信號質量仿真已經成為電子系統設計師必須采取的設計手段。只有通過高速電路仿真和先進的物理設計軟件,才能實現設計過程的可控性。傳輸線效應基于上述定義的傳輸線模型,歸納起來,傳輸線會對整個電路設計帶來以下效應。 · 反射信號Reflected signals · 延時和時序錯誤Delay & Timing errors · 過沖(上沖/下沖)Overshoot/Undershoot · 串擾Induced Noise (or crosstalk) · 電磁輻射EMI radiation

    標簽: 高速電路 傳輸線 效應分析

    上傳時間: 2013-11-16

    上傳用戶:lx9076

  • 凌力爾特電池管理解決方案

    Linear Technology’s high performance battery management ICsenable long battery life and run time, while providing precision charging control, constantstatus monitoring and stringent battery protection. Our proprietary design techniques seamlesslymanage multiple input sources while providing small solution footprints, faster charging and100% standalone operation. Battery and circuit protection features enable improved thermalperformance and high reliability operation.

    標簽: 凌力爾特 電池管理 方案

    上傳時間: 2013-10-13

    上傳用戶:yyq123456789

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