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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(cè)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
Easy-to-Use, Ultra-Tiny, Differential, 16-Bit Delta Sigma ADC With I2C Interface The LTC2453 is an ultra-tiny, fully differential, 16-bit, analog-to-digital converter. The LTC2453 uses a single 2.7V to 5.5V supply and communicates through an I2C interface. The ADC is available in an 8-pin, 3mm x 2mm DFN package. It includes an integrated oscillator that does not require any external components. It uses a delta-sigma modulator as a converter core and has no latency for multiplexed applications. The LTC2453 includes a proprietary input sampling scheme that reduces the average input sampling current several orders of magnitude lower than conventional delta-sigma converters. Additionally, due to its architecture, there is negligible current leakage between the input pins.
標(biāo)簽： Differential Easy-to-Use Ultra-Tiny Interface
上傳時(shí)間： 2014-01-08
上傳用戶：鳳臨西北
Oversampling Delta-Sigma Data Converters
標(biāo)簽： Oversampling Delta-Sigma Converters Data
上傳時(shí)間： 2013-12-23
上傳用戶：1583060504
Intro to Delta Sigma and PWM
標(biāo)簽： Intro Delta Sigma PWM
上傳時(shí)間： 2017-05-12
上傳用戶：1109003457
關(guān)于delta sigma 共總原理，非常有用的東西
標(biāo)簽： Delta sigma
上傳時(shí)間： 2015-04-14
上傳用戶：憂郁王子
當(dāng)今高新技術(shù)不斷發(fā)展，越來(lái)越多的高精度儀器設(shè)備對(duì)輸入電源，特別是對(duì)輸入交流電源的穩(wěn)壓精度要求越來(lái)越高。與此同時(shí)，隨著我國(guó)經(jīng)濟(jì)的發(fā)展和用電負(fù)載的急劇增加，電壓波動(dòng)和波形畸變等供電質(zhì)量問(wèn)題日趨突出，不能滿足高精度儀器設(shè)備的需要，因而就需要在電網(wǎng)和這些設(shè)備之間增加高穩(wěn)壓精度、寬穩(wěn)壓范圍的交流穩(wěn)壓電源。基于Delta逆變技術(shù)的交流穩(wěn)壓電源既能進(jìn)行瞬時(shí)的交流電壓穩(wěn)定補(bǔ)償，又能提高整流輸入端的功率因數(shù)，減少諧波對(duì)電網(wǎng)的污染，因而具有重要的實(shí)際意義和研究?jī)r(jià)值。 本文采取串聯(lián)補(bǔ)償型變換器作為主電路的拓?fù)浣Y(jié)構(gòu)，并從能量雙向傳輸方面對(duì)主電路進(jìn)行了詳細(xì)闡述。針對(duì)Delta逆變器工作特點(diǎn)對(duì)交流穩(wěn)壓電源的工作原理進(jìn)行了分析，并提出一種正向補(bǔ)償采取整流加高頻斬波，負(fù)向補(bǔ)償采取有源箝位Buck變換器的工作模式。建立Delta逆變器與電網(wǎng)相互作用的等效電路模型，得出了理想補(bǔ)償電壓與實(shí)際補(bǔ)償電壓定量關(guān)系式，分析了逆變輸出濾波器的結(jié)構(gòu)、位置對(duì)濾波效果的影響和電氣參數(shù)對(duì)實(shí)際補(bǔ)償效果的作用規(guī)律。完成了逆變器的輸出濾波器、補(bǔ)償變壓器的設(shè)計(jì)和PWM整流器電容參數(shù)的計(jì)算。 針對(duì)穩(wěn)壓系統(tǒng)中Delta逆變器和PWM整流器兩個(gè)主體環(huán)節(jié)，對(duì)Delta逆變器的前饋、反饋控制特性和PWM整流器的間接、直接電流控制特性分別進(jìn)行了綜合比較，并應(yīng)用MATLAB軟件建立了改進(jìn)前饋控制與直接電流控制的仿真模型，對(duì)Delta逆變交流穩(wěn)壓速度和精度進(jìn)行了系統(tǒng)仿真分析，給出了仿真波形，驗(yàn)證了文中所述控制策略的可行性。
標(biāo)簽： Delta 逆變技術(shù) 串聯(lián)補(bǔ)償
上傳時(shí)間： 2013-07-10
上傳用戶：1047385479
Sampling Delta-Sigma Audio DACMICRF102是Micrel公司新近推出的遠(yuǎn)距離無(wú)線數(shù)據(jù)發(fā)射芯片。該芯片采用Micrel公司最新的快速無(wú)線傳輸技術(shù),可實(shí)現(xiàn)真正的“數(shù)
標(biāo)簽： MICRF 102 數(shù)據(jù)手冊(cè)
上傳時(shí)間： 2013-04-24
上傳用戶：hebmuljb
用fpga實(shí)現(xiàn)的DA轉(zhuǎn)換器，有說(shuō)明和源碼，VDHL文件。\\r\\nA PLD Based Delta-Sigma DAC\\r\\nDelta-Sigma modulation is the simple, yet powerful,\\r\\ntechnique responsible for the extraordinary\\r\\nperformance and low cost of today s audio CD\\r\\nplayers. The simplest Delta-Sigm
標(biāo)簽： fpga DA轉(zhuǎn)換器
上傳時(shí)間： 2013-08-22
上傳用戶：dudu1210004
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: Specifications such as noise, effective number of bits (ENOB), effective resolution, and noise-free resolution inlarge part define how accurate an ADC really is. Consequently, understanding the performance metrics related to noise isone of the most difficult aspects of transitioning from a SAR to a delta-sigma ADC. With the current demand for higherresolution, designers must develop a better understanding of ADC noise, ENOB, effective resolution, and signal-to-noiseratio (SNR). This application note helps that understanding.
標(biāo)簽： ENOB 模數(shù)轉(zhuǎn)換器
上傳時(shí)間： 2013-10-16
上傳用戶：x18010875091
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