27) What is one disadvantage of the ripple-carry adder? A) The interconnections are more complex. C)...

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27) What is one disadvantage of the ripple-carry adder? A) The interconnections are more complex. C) It is slow, due to propagation time. 28) In the decimal value 4256, the weight of the numeral 2 is A) 10-22 B) 102 C) 200 29) Why is the fanout of CMOS gates frequency dependent? A) When the frequency reaches the critical value, the gate will only be capable of delivering 70% of the normal output voltage and consequently the output power will be one-half of normal; this defines the upper operating frequency. B) The input gates of the FETs are predominantly capacitive, and as the signal frequency increases the capacitive loading also increases, thereby limiting the number of loads that may be attached to the output of the driving gate. C) Each CMOS input gate has a specific propagation time and this limits the number of different gates that can be connected to the output of a CMOS gate. D) The higher the number of gates attached to the output, the more frequently they will have to be serviced, thus reducing the frequency at which each will be serviced with an input signal. 30) Which of the logic families listed below allows the highest operating frequency? A) 74AS B) HCMOS (548 31) The simplest Boolean expression for the Karnaugh map below is, c с 0 0 1 AB 1 1 AR 0 1 B) More stages are required to a full-adder. D) All of the above are correct. B A B A) AB+ AB C) X-AB 32) Which of the following is an invalid BCD code? A) 1101 B) 0011 B) ABC ABC ABC D) X-AC B E-S 00101 33) Which of the following is correct for a gated Dlatch? A) The output complement follows the input when enabled. B) Only one of the inputs can be high at a time. Qoutput follows the input D when the ENABLE is high D) The output toggles if one of the inputs is held high D) 103 34) Which of the following ratings is not associated with flip-flops? A) Interval time B) Hold time C) Propagation delay time D) Set-up time D) ECL D) 1001 30) 31) 32) 34) 33) 27) 28) 29) 27) What is one disadvantage of the ripple-carry adder? A) The interconnections are more complex. C) It is slow, due to propagation time. 28) In the decimal value 4256, the weight of the numeral 2 is A) 10-22 B) 102 C) 200 29) Why is the fanout of CMOS gates frequency dependent? A) When the frequency reaches the critical value, the gate will only be capable of delivering 70% of the normal output voltage and consequently the output power will be one-half of normal; this defines the upper operating frequency. B) The input gates of the FETs are predominantly capacitive, and as the signal frequency increases the capacitive loading also increases, thereby limiting the number of loads that may be attached to the output of the driving gate. C) Each CMOS input gate has a specific propagation time and this limits the number of different gates that can be connected to the output of a CMOS gate. D) The higher the number of gates attached to the output, the more frequently they will have to be serviced, thus reducing the frequency at which each will be serviced with an input signal. 30) Which of the logic families listed below allows the highest operating frequency? A) 74AS B) HCMOS (548 31) The simplest Boolean expression for the Karnaugh map below is, c с 0 0 1 AB 1 1 AR 0 1 B) More stages are required to a full-adder. D) All of the above are correct. B A B A) AB+ AB C) X-AB 32) Which of the following is an invalid BCD code? A) 1101 B) 0011 B) ABC ABC ABC D) X-AC B E-S 00101 33) Which of the following is correct for a gated Dlatch? A) The output complement follows the input when enabled. B) Only one of the inputs can be high at a time. Qoutput follows the input D when the ENABLE is high D) The output toggles if one of the inputs is held high D) 103 34) Which of the following ratings is not associated with flip-flops? A) Interval time B) Hold time C) Propagation delay time D) Set-up time D) ECL D) 1001 30) 31) 32) 34) 33) 27) 28) 29)