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ECE 320 Homework #7 1. 2. 3. 4. Design a sequence detector such that the output is equal to 1 if the sequence “0101” is detected. (Discard the overlapping possibility) A) A memory unit has the capacity of 8192 words of 32 bits per word. How many flipflops are needed for the memory address register and memory buffer register? B) How many words will the memory unit contain if the address register has 15 bits? A) Draw a block diagram of the 4x3 memory, showing all inputs and outputs. B) Construct a 8x3 memory unit using two such units. (Use a block diagram) Draw a timing diagram for the 4-bit binary ripple counter. ECE 320 Homework #7 5. 6. 7. A flip-flop has a 20 ns delay from the time its CP input goes from 1 to 0 to the time the output is complemented. What is the maximum delay in a 10 bit binary ripple counter that uses these flipflops? What is the maximum frequency the counter can operate at reliability? List a PLA program table for the BCD-to-excess-3 code converter. Design a combinational circuit using a ROM. The circuit accepts a 3-bit number and generates an output binary number equal to the square of the input number.