22. A 7-segment decoder/driver drives the display in Figure 6-78. If the waveforms are applied as indicated, determine the sequence of digits that appears on the display. BCD/7-seg Ao a b A1 Ag 2 Az Az 4 8. FIGURE 6-78

4. For the parallel adder in Figure 6-69, determine the complete sum by analysis of the logical operation of the circuit. Verify your result by longhand addition of the two input numbers. Figure 6-69 Figure 6-70 1 0 A B Cin Cout Σε Σ A B Cin Σε Cout ΣΑ Σ 5. Repeat Problem 4 for the circuit and input conditions in Figure 6-70. Ο Ο A B Cin Cout Σ 1 0 ΣΑ A B Cin| Cout Σ A B Cin Cout Σ A B C Σ; Cout Σ 0 1 Σ A B Cin Cout Σ Στ A B Cin Cout Σ

4. For the parallel adder in Figure 6-69, determine the complete sum by analysis of the logical operation of the circuit. Verify your result by longhand addition of the two input numbers. FIGURE 6-69 10 10 ABC ABC А В СМ C out Σ out 3 Σ out 5 Σ

28. For each circuit in Figure 6-83, determine the Thevenin equivalent as seen from terminals A and B. 2.5 V (a) R₁ 100 (2 R3 www 47 Ω FIGURE 6-83 R₁ 22 (2 R₂ 78 Ω A B R₁ (b) R₁ 100 (2 R₁ B 3 V HOF ✓ R₂ 270 Ω =1.5 V (c) R₁ 100 ΚΩ R₂ 56 ΚΩ B RL

28. For the multiplexer in Figure 6-79, determine the output for the following input states: D₁ = 0, D₁ = 1, D₂ = 1, D3 = 0, S₁ = 1, S₁ = 0. So S₁ Do D₁ D₂ D3 MUX } of G 0 1 2 3 Figure 6-79 Y

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Section 6-8 Multiplexers (Data Selectors) 28. For the multiplexer in Figure 6-79, determine the output for the following input states: D. Di = 0, D2 = 0, D3 = 1, So = 0, S1 = 1. %3D MUX Do 1 2 3 FIGURE 6-79

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If resistance is 20 ohm. and inductance is 27 henry in a R-L series circuit, then time constant of this circuit will be (a) 0.001 s (b) 1.3 s (c) 10 s (d) 100 s