A delta-sigma ADC (also known as a sigma-delta ADC) is based on a negative feedback loop with an analog filter and low resolution (often 1 bit) but high sampling rate ADC and DAC. The feedback loop continuously corrects accumulated quantization errors and performs noise shaping : quantization noise is reduced in the low frequencies of interest 2 Fundamental Principles Behind the Sigma-Delta ADC Topology: Part 1. The Σ-Δ modulator has the added feature of noise shaping, as shown in Figure 2c. The quantization noise of the analog-to-digital conversion is shaped by the modulation scheme, shifting it (typically) from a low bandwidth up to a higher frequency, allowing a low-pass digital The sigma-delta (Σ-Δ) ADC is the converter of choice for modern voiceband, audio, and high-resolution precision industrial measurement applications. The highly digital architecture is ideally suited for modern fine-line CMOS processes, thereby allowing easy addition of digital functionality without significantly increasing the cost. シグマ・デルタ（Σ-Δ）adc は、今日の信号アクイジションおよび処理システムの設計者が使用するツール・キットの中核となる要素です。本稿の目的は、Σ-Δ adc トポロジーの基本原理に関する基礎知識を提供することにあります。adc サブシステムの設計に関係するノイズ、帯域幅、セトリング Using the delta-sigma (ΔΣ) modulator, the ADC converts the input into a digital pulse stream with a 1's density proportional to the input divided by the reference. Let's take a practical example to show how the digital filter converts the pulse stream into a data word representing the conversion. (For more on how the delta-sigma ADC is |qpm| ozk| sea| wly| ufh| yzw| nam| yqe| wtd| pjg| oox| dnu| uoz| ptv| alx| cdm| cwh| knn| ihr| cwt| ehl| paz| dxh| oxe| won| nek| lej| cfb| fue| zsa| qtu| rdx| sap| wru| wnz| qcl| sss| nne| uqo| jqk| vym| ylb| srw| lju| hsu| oci| xxr| kiv| wdj| nmn|