1.9 Consider a 4-bit digital word D = b3b2b1b0 (see Eq. 1.3) used to represent an analog signal vA that varies between 0 V and +3.75 V.
(a) Give D corresponding to vA = 0 V, 0.25 V, 1 V, and 3.75 V.
(b) What change in vA causes a change from 0 to 1 in (i) b0, (ii) b1, (iii) b2, and (iv) b3?
(c) If vA = 1.3 V, what do you expect D to be? What is the resulting error in representation?
(a) 0000, 0001, 0100, 1111; (b) +0.25 V, +0.50 V, +1 V, +2 V; (c) 0101, –4%
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