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00000EC20712 1903

PART ^
Answer any two full questions, each carries 20 marks.

Construct a 4 bit serial-in serial-out 10/1 shift register using JK FF. Describe its
operation on every clock pulse.

Show the state table and Mealy model state diagram of JK FF. Derive its
characteristic equation

Design a 3-bit asynchronous up/down counter using JK FF that counts up when
the mode M=1 and counts down when Mode=0. How does the circuit work
Explain the working of a twisted ring counter, with the help of timing diagrams.
Design a circuit to detect the sequence 1010 with overlapping, using D FF. Draw
the state diagram, state table, excitation table and the circuit

Minimize the state table using implication chart.

Present | Next state Output

state

ok ok

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