Digital Systems: Principles and Applications 12th. Edition by Neal S. Widmer, Gregory L. Moss, Ronald J. Tocci | 9781292162003 | 1292162007 | Holooly

Digital Systems Design

Digital Systems: Principles and Applications [EXP-30300]

218 SOLVED PROBLEMS

Question: 2.3

(a) Convert 42310 to hex. (b) Convert 21410 to hex.

Verified Answer:

Question: 7.4

(a) Determine fmax for the synchronous counter of Figure 7-5(a) if tpd for each FF is 50 ns and tpd for each AND gate is 20 ns. Compare this value with fmax for a MOD-16 ripple counter. (b) What must be done to convert this counter to MOD-32? (c) Determine fmax for the MOD-32 parallel counter.

Verified Answer:

(a) In a synchronous counter, the total delay that...

Question: 6.11

(a) Determine the 74HC382 outputs for the following inputs: S2S1S0 = 010, A3A2A1A0 = 0100, B3B2B1B0 = 0001, and CN = 1.(b) Change the select code to 011 and repeat.

Verified Answer:

(a) From the function table in Figure 6-15(b), 010...

Question: 11.7

(a) Determine the weight of each input bit of Figure 11-5(a). (b) Change RF to 250 Ω and determine the full-scale output.

Verified Answer:

(a) The MSB passes with gain = 1, so its weight in...

Question: 9.19

(a) For Figure 9-44, describe the conditions necessary to transmit data from device 3 to the microprocessor. (b) What will the status of the data bus be when none of the devices is enabled?

Verified Answer:

(a) ENABLE 3 must be activated; ENABLE 1 and ENABL...

Question: 5.16

(a) What address code must the MPU in Figure 5-58 generate in order for the data to be transferred into register X? (b) Assume that X3-X0 = 0110, A15-A8 = 11111111, and D3-D0 = 1011. What will be in X after a WR pulse occurs?

Verified Answer:

(a) In order for the data to be transferred into X...

Question: 2.2

(a) What is the total range of decimal values that can be represented in eight bits? (b) How many bits are needed to represent decimal values ranging from 0 to 12,500?

Verified Answer:

(a) Here we have N = 8. Thus, we can represent dec...

Question: 7.5

(a) What will be the status of the LEDs when the counter in Figure 7-7(b) is holding the count of five? (b) What will the LEDs display as the counter is clocked by a 1-kHz input? (c) Will the 110 state be visible on the LEDs?

Verified Answer:

(a) Because

5_{10} = 101_{2}

, the [...

Question: 11.4

A 10-bit DAC has a step size of 10 mV. Determine the full-scale output voltage and the percentage resolution.

Verified Answer:

With 10 bits, there will be

2^{10}

...

Question: 8.14

A 4001B output is driving three 74LS inputs. Is this a well-designed circuit?

Verified Answer:

NO! The 4001B can sink 0.4 mA, but each 74LS input...

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