Refer to Figure 4-8(a), where an analog-to-digital converter is monitoring the dc voltage (V_B) of a 12-V storage battery on an orbiting spaceship. The converter’s output is a four-bit binary number, ABCD, corresponding to the battery voltage in steps of 1 V, with A as the MSB. The converter’s binary outputs are fed to a logic circuit that is to produce a HIGH output as long as the binary value is greater than 0110₂ = 6₁₀; that is, the battery voltage is greater than 6 V. Design this logic circuit.

Figure 4-8

Transcribed Image Text:

A BUD Analog- A B to- digital C converter (c) MSB LSB A B Logic C circuit D (a) z = A + BCD Z AO А (0) 0 OOOO 0 0 DOO (2) (3) (4) (5) 0 1 (6) 0 1 (7) 1 BOOOO -TT (13) 1 (14) (15) 0 0 1 1 0 1 0 0 VOO ooo C D 0 0 1 0 0 0 1 1 TOC 1 1 (10) 1 (11) 1 0 1 (12) 1 1 0 1 1 1 1 1 1 0 0 1 1 0 1 1 OTO TO 0 0 1 0 0 1 0 1 0 OOT 0 (b) - O 110T NOOOOooo 0 1→ ABCD 1 → ABCD 1 → ABCD 1 → ABCD 1 ABCD 1 → ABCD 1 → ABCD 1 → ABCD 1→ ABCD