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lte-A

lte-Advanced是LTE(LongTermEvolution)的演進(jìn),2008年3月開始,2008年5月確定需求。它滿足ITU-R的IMT-Advanced技術(shù)征集的需求,lte-A不僅是3GPP形成歐洲IMT-Advanced技術(shù)提案的一個(gè)重要來源,還是一個(gè)后向兼容的技術(shù),完全兼容LTE,是演進(jìn)而不是革命。
  • 高精度Delta-Sigma A/D轉(zhuǎn)換器原理及其應(yīng)用

    本次在線座談主要介紹TI的高精度Delta-Sigma A/D轉(zhuǎn)換器的原理及其應(yīng)用,Delta-Sigma A/D轉(zhuǎn)換器在稱重儀器中,大量采用比例測量方法。

    標(biāo)簽: Delta-Sigma 高精度 轉(zhuǎn)換器

    上傳時(shí)間: 2013-10-17

    上傳用戶:zhqzal1014

  • DAC技術(shù)用語 (D/A Converters Defini

    Differential Nonlinearity: Ideally, any two adjacent digitalcodes correspond to output analog voltages that are exactlyone LSB apart. Differential non-linearity is a measure of theworst case deviation from the ideal 1 LSB step. For example,a DAC with a 1.5 LSB output change for a 1 LSB digital codechange exhibits 1⁄2 LSB differential non-linearity. Differentialnon-linearity may be expressed in fractional bits or as a percentageof full scale. A differential non-linearity greater than1 LSB will lead to a non-monotonic transfer function in aDAC.Gain Error (Full Scale Error): The difference between theoutput voltage (or current) with full scale input code and theideal voltage (or current) that should exist with a full scale inputcode.Gain Temperature Coefficient (Full Scale TemperatureCoefficient): Change in gain error divided by change in temperature.Usually expressed in parts per million per degreeCelsius (ppm/°C).Integral Nonlinearity (Linearity Error): Worst case deviationfrom the line between the endpoints (zero and full scale).Can be expressed as a percentage of full scale or in fractionof an LSB.LSB (Lease-Significant Bit): In a binary coded system thisis the bit that carries the smallest value or weight. Its value isthe full scale voltage (or current) divided by 2n, where n is theresolution of the converter.Monotonicity: A monotonic function has a slope whose signdoes not change. A monotonic DAC has an output thatchanges in the same direction (or remains constant) for eachincrease in the input code. the converse is true for decreasing codes.

    標(biāo)簽: Converters Defini DAC

    上傳時(shí)間: 2013-10-30

    上傳用戶:stvnash

  • ADC轉(zhuǎn)換器技術(shù)用語 (A/D Converter Defi

    ANALOG INPUT BANDWIDTH is a measure of the frequencyat which the reconstructed output fundamental drops3 dB below its low frequency value for a full scale input. Thetest is performed with fIN equal to 100 kHz plus integer multiplesof fCLK. The input frequency at which the output is −3dB relative to the low frequency input signal is the full powerbandwidth.APERTURE JITTER is the variation in aperture delay fromsample to sample. Aperture jitter shows up as input noise.APERTURE DELAY See Sampling Delay.BOTTOM OFFSET is the difference between the input voltagethat just causes the output code to transition to the firstcode and the negative reference voltage. Bottom Offset isdefined as EOB = VZT–VRB, where VZT is the first code transitioninput voltage and VRB is the lower reference voltage.Note that this is different from the normal Zero Scale Error.CONVERSION LATENCY See PIPELINE DELAY.CONVERSION TIME is the time required for a completemeasurement by an analog-to-digital converter. Since theConversion Time does not include acquisition time, multiplexerset up time, or other elements of a complete conversioncycle, the conversion time may be less than theThroughput Time.DC COMMON-MODE ERROR is a specification which appliesto ADCs with differential inputs. It is the change in theoutput code that occurs when the analog voltages on the twoinputs are changed by an equal amount. It is usually expressed in LSBs.

    標(biāo)簽: Converter Defi ADC 轉(zhuǎn)換器

    上傳時(shí)間: 2013-11-12

    上傳用戶:pans0ul

  • CV181L-A-20_Specification_V1.0(大功放)

    cv181l-a-20

    標(biāo)簽: Specification_V 181 1.0 L-A

    上傳時(shí)間: 2013-11-14

    上傳用戶:daijun20803

  • 2012TI杯陜西賽題-A微弱信號(hào)檢測裝置

    2012TI杯陜西賽題H題,2012TI杯陜西賽題-A微弱信號(hào)檢測裝置.

    標(biāo)簽: 2012 TI 微弱信號(hào) 檢測裝置

    上傳時(shí)間: 2013-12-17

    上傳用戶:362279997

  • 2011全國大賽A題開關(guān)電源模塊并聯(lián)供電系統(tǒng)

    2011全國大賽A題開關(guān)電源模塊并聯(lián)供電系統(tǒng)

    標(biāo)簽: 2011 大賽 開關(guān)電源模塊 并聯(lián)供電系統(tǒng)

    上傳時(shí)間: 2013-11-10

    上傳用戶:冇尾飛鉈

  • 安富利:基于MSP430FE427(A) 模塊的電度表解決方案(英文版)

      Avnet Design Service電源實(shí)驗(yàn)室開發(fā)出基于MSP430FE427(A) 模塊的電度表解決方案:   (1)電壓 (90Vac~264Vac) 與電流 (10Arms) 測量范圍寬   (2)電度表是一種測量用電量的設(shè)備   (3)LCD顯示電量 (kWh)、功率 (W)、電壓 (V)、電流 (A)、功率因數(shù)(PF) 與溫度 (oC) 測量值   (4)264Vac/63Hz與140mW @90Vac/47Hz條件下,無負(fù)載功耗低于300mW   (5)測量精度高達(dá)2%

    標(biāo)簽: MSP 430 427 FE

    上傳時(shí)間: 2013-10-13

    上傳用戶:cjf0304

  • 小型直流電源PMC-A/PMC系列

    PMC和PMC-A系列是小型,高性能,恒定電壓,恒定電流的串聯(lián)調(diào)節(jié)器方式的DC電源。采用串聯(lián)調(diào)節(jié)器方式的設(shè)計(jì),可以在低噪聲輸出等級(jí)的情況下實(shí)現(xiàn)了高穩(wěn)定的輸出。LED數(shù)字儀表在朦朧的環(huán)境中也能清晰易讀,電子開關(guān)排除了繼電器的顫動(dòng),也是這一系列的特征。此外,一部分的PMC-A系列裝備了各種遠(yuǎn)程控制功能,通過GPIB,可連接電源控制器。

    標(biāo)簽: PMC-A PMC 直流電源

    上傳時(shí)間: 2013-10-23

    上傳用戶:GHF

  • 用MSP430實(shí)現(xiàn)斜率 A/D轉(zhuǎn)換的溫度控制系統(tǒng)

    用 MSP430實(shí)現(xiàn)斜率 A/D轉(zhuǎn)換的溫度控制系統(tǒng)

    標(biāo)簽: MSP 430 D轉(zhuǎn)換 斜率

    上傳時(shí)間: 2013-12-21

    上傳用戶:athjac

  • A-C8V4開發(fā)板-使用說明書

    A-C8V4開發(fā)板-使用說明指南

    標(biāo)簽: A-C 開發(fā)板 使用說明書

    上傳時(shí)間: 2013-11-04

    上傳用戶:王小奇

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