推 deathcustom:去看Quantization Error相關的東西你就知道了 10/02 03:53
→ deathcustom:其實你從小在作的四捨五入動作就有這種意思 10/02 03:54
→ deathcustom:所以你的尺刻度是1mm，那你量東西的最大誤差就是0.5mm 10/02 03:55
→ fairwarning:好 ..我在去看看..謝謝喔 10/02 12:03
[題目]
An analog signal in the range 0 to +10V is to be converted to an 8-bit
digital signal.
(a)What is the digital representation of an input of 6.2V?
(b)What is the largest possible quantization error as a percent of full scale?
[解答]
每bit解析度為: (10-0)/2^8 -1 = 0.0392伏特
(a) 10011110
(b) 最大誤差 0.0392/2伏 , 百分比為0.196%
[疑問]
請問為何(b)最大誤差 0.0392 要除以2呢??
要公式嗎? 還是有其他觀念呢?
謝謝大家的指正,謝謝!!
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