Abstract: An earlier application note, "Coherent Sampling vs. Window Sampling," covered the basics of coherent sampling. It showed differences between tests performed with coherent sampling and windowed sampling conditions. The following t...

摘要：基站系統(tǒng)(BTS)需要在符合各種不同標(biāo)準(zhǔn)的同時滿足信號鏈路的指標(biāo)要求。本文介紹了一些信號鏈路器件，例如：高動態(tài)性能ADC，可變增益放大器，混頻器和本振，詳細(xì)介紹了它...

Abstract: This calculator provides a quick and easy way to select sinusoidal input test tones for the test of analog-to-digital (ADC) converters. Based on the theory of coherent sampling, the calculator allows a user to chose input and sam...

Abstract: This application note demonstrates how to quickly verify the dynamic performance of any ADC without requiring expensive data-processing software. Although Microsoft Excel limits the number of data points to 4k, this application n...

摘要：本文探討如何利用MATLAB強大的指令功能改進(jìn)高速數(shù)據(jù)采集系統(tǒng)中存儲器受限的代碼密度，提高程序代碼的循環(huán)量，以滿足高速模/數(shù)轉(zhuǎn)換器(ADC)的INL、DNL測試需求。 ...

摘要：MATLAB®是一個強有力的工具，可用來快速分析從模數(shù)轉(zhuǎn)換器(ADC)輸出所捕獲的數(shù)據(jù)。本應(yīng)用筆記演示了如何使用MATLAB來突破邏輯分析儀存儲深度的局限。描述并比較了三種數(shù)...

摘要：本應(yīng)用筆記提供一種快速、容易使用的工具，用來確定鏡像信號的真實位置和重疊頻率的位置，以及典型頻譜中的諧波頻率。所得數(shù)據(jù)用于分析模/數(shù)轉(zhuǎn)換器(ADC)和數(shù)/模轉(zhuǎn)換器(...

摘要：今天的低功耗微控制器(μC)也開始集成原先只存在于大型微處理器、ASIC和DSP中的外設(shè)功能，使我們有可能以很低的功耗實現(xiàn)復(fù)雜的算術(shù)運算。本文討論一種快速傅立葉變換(FFT)...

摘要：該應(yīng)用筆記提出了超低抖動時鐘合成器的一種設(shè)計思路，其目標(biāo)是產(chǎn)生2GHz時鐘時，邊沿之間的抖動< 100fs。分析和仿真結(jié)果表明，要達(dá)到這一抖動指標(biāo)，設(shè)計難度遠(yuǎn)遠(yuǎn)高于預(yù)...

Abstract: This article describes an automated data collection system for analog-to-digital converters (ADCs). It discusses the advantages of automating data collection as well as a detailed description of the hardware and software. It goes...

Abstract: This application note discusses phase frequency detector characteristics that affect phase-locked loop (PLL) dead band and jitter performance. In PLLs that employ charge pump loop filter designs the provision of a minimum duratio...

接收靈敏度的定義公式 摘要：本應(yīng)用筆記論述了擴頻系統(tǒng)靈敏度的定義以及計算數(shù)字通信接收機靈敏度的方法。本文提供了接收...

Simplifyin...

Abstract: Residual phase noise from local oscillators (LO) can be degraded by additive noise of on-chip local oscillator drivers/buffers in integrated circuit mixers. Reciprocal mixing of strong RF signals with the LO noise degrades the re...

摘要：該應(yīng)用筆記論述了如何選擇適當(dāng)?shù)淖儔浩骱蜔o源元件，并在不犧牲高速ADC動態(tài)性能的情況下獲得較寬的輸入頻響的增益平坦度。 對于較高IF的模/數(shù)轉(zhuǎn)換器(ADC)，...

摘要：來自Maxim的兩種新型數(shù)/模轉(zhuǎn)換器(DAC)能夠為通信和儀表系統(tǒng)提供更高的動態(tài)特性，MAX5886/MAX5887/MAX5888 12位至16位轉(zhuǎn)換器在保持高采樣速率和低功耗的同時，具有出色的動態(tài)特性...

摘要：本文指導(dǎo)用戶選擇適當(dāng)?shù)淖儔浩?，用于高速?數(shù)轉(zhuǎn)換器(ADC)前端的信號調(diào)理。本文還闡述了如何合理選擇無源元件，在較寬的輸入頻率范圍內(nèi)改善增益的平坦度，而且不會犧...

Enabling T...

摘要：汽車視頻應(yīng)用中，降低視頻干擾的途徑是用數(shù)字信號替代模擬信號。最有效的視頻傳輸方案是采用低電壓差分信號(LVDS)接口，因為它具有較低的信號幅度(0.35V)和差分架構(gòu)，可...

摘要：可變增益放大器(VGA)，有時也稱作時間增益控制(TGC)放大器，是相空陣超聲接收機的關(guān)鍵部件。本文分析了VGA的輸出參考噪聲和增益對超聲脈沖多普勒儀的動態(tài)范圍和靈敏度的...