Which Boolean Expressions are implemented by a PAL A SumofPr

Which Boolean Expressions are implemented by a PAL? A) Sum-of-Product B) DeMorgan C) Product-of-Sum D) Both A and C The table shown in Figure 8-6 is called a. A) state diagram B) sequential truth table C) present state table D) next-state table Refer to the circuit and waveforms in Figure 9-2. What is the value of the data stored in Q3. Q2. Q1 and QO respectively at time X? A) 0 1 1 1 B) 0 1 1 0 C) 0 1 0 1 D) 1 1 1 0 Refer to the circuit and waveforms in Figure 9-2. What is the value of the data stored in Q3, QZ Q1 and QO respectively after four clock cycles? A) 1010 B) 0 0 0 0 C) 0101 D)0110 Which of the following statements is true? A) Synchronous events do not need a clock to control them b) Only asynchronous events need a control clock. C) Asynchronous events are controlled by a clock. D) Asynchronous events occur independently of the circuit clock.

Solution

(9) the PAL are implemented using sum of products (SOP) .so the option (A) is correct .

(10) the table will gives the state diagram information. so the option (A) is correct.

(11) the values of the data stored in Q3Q2Q1Q0 at time X is 1110. so the option (D) is correct

(12) the value of the data stored after four clock cycles is Q3Q2Q1Q0 is 0101 .so the option (c) is correct.

(13) the Asynchronous events occur indepently of the circuit clock .because asynchronous counter is does not need clock .