ダウンロード

マニュアル、データシート、ソフトウェアなどのダウンロード:

ダウンロード・タイプ
型名またはキーワード

フィードバック

What is quantization error and how does signal to noise relate to this?

質問:

What is quantization error and how does signal to noise relate to this?

回答:

Quantization error is the difference between the analog signal and the closest available digital value at each sampling instant from the A/D converter. Quantization error also introduces noise, called quantization noise, to the sample signal. The higher the resolution of the A/D converter, the lower the quantization error and the smaller the quantization noise. The relationship between resolution (in bits) and quantization noise for an ideal A/D converter can be expressed as Signal to Noise (S/N) = -20*log (1/2^n) where n is the resolution of the A/D converter in bits. S/N is the signal to noise and is expressed in dB. This relationship can also be approximated as S/N = 6*n. Typical S/N ratios for ideal A/D converters are 96dB for 16 bits, 72dB for 12 bits, and 48dB for 8 bits.


FAQの該当製品:

製品シリーズなし

製品:

FAQ ID 70621

すべてのFAQを表示 »

Read Next

Tutorial: Digital to Analog Conversion – The R-2R DAC

What are aliasing errors? Are they hard to detect?

Making Higher Accuracy Oscilloscope Measurements