This document discusses flip-flop circuits, which are electronic circuits that store state information and are used in sequential logic. It describes the main types of flip-flops including SR, D, and JK flip-flops. SR flip-flops can be constructed using either NOR or NAND gates. The JK flip-flop is considered a universal flip-flop circuit. Flip-flops have applications in memory circuits, logic control devices, and as register devices.

1. FLIP-FLOP CIRCUITS AND
ITS APPLICATIONS

2. FLIP-FLOP
 Electronic circuit
Bi-stable multivibrator
Sequential logic
Store state information

4. SR flip-flop
D flip-flop
JK flip flopTYPES OF
FLIP-FLOP

5. NOR
NAND
SR FLIP-FLOP

6. SR FLIP-FLOP(NAND)
0 0 RACE
1 0 1 0
0 1 0 1
1 1 Q Q
S R Q Q

7. SR FLIP-FLOP(NOR)
0 0 Q Q
1 0 1 0
0 1 0 1
1 1 RACE
S R Q Q

8. JK FLIP FLOP
This simple JK flip Flop is the
most widely used of all the flip-flop
designs and is considered to be a
universal flip-flop circuit. The
sequential operation of the JK flip
flop is exactly the same as for the
previous SR flip-flop with the same
“Set” and “Reset” inputs. The
difference this time is that the “JK
flip flop” has no invalid or
forbidden input states of the SR
Latch even when S and R are both
at logic “1”.

9. D FLIP-FLOP
• The D flip-flop tracks the input, making transitions with match those of
the input D. The D stands for "data"; this flip-flop stores the value that
is on the data line.

10. APPLICATIONS
•Memory circuits
•Logic control devices
•Register device

11. The end