Main difference between a latch and a flip flop, Electrical Engineering

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Question:

a) What is the main difference between a latch and a flip flop?

b) Draw the logic diagram of an SR-latch using only NAND gates.

c) A positive edge triggered J-K flip flop with preset and clear inputs is shown below. Determine Q and for the inputs shown by the timing diagram.

1376_Main difference between a latch and a flip flop.png

1107_Main difference between a latch and a flip flop1.png

d) Draw a BCD asynchronous decade counter (which counts from 0000 to 1001) with asynchronous active low clear and negative edge triggered clock.

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