6. PRESENTATION OUTLINE
• FLIP-FLOP
• LEVEL TRIGGERED& EDGE TRIGGERED
• SYNCHRONUS
• TYPES OF FLIP-FLOP
• SR FLIP-FLOP
• JK FLIP-FLOP
• D FLIP-FLOP
• T FLIP-FLOP
7. FLIP-FLOP
In electronics a flip-flop or latgh is a circuit that
has two stable states and can be used to store
state information , basically they are the
fundamental building blocks of digital
electronics system used in computers. Flip-
flop and latches are used as data storage
elements. It is a device which stores a single
bit of data, it represent 0 & 1. Flip-flop can be
either level-triggered or edge-triggered
circuits that stores a single bit of data using
gates.
8. SYNCHRONUS
Synchronus sequential circuit uses logic gates
as Flip-flop as storage device & as a clock
signal in its one output & it has a clock signal
in its one input. The state transition occurs
when the value changes 0 to 1 or 1 to 0.
0 to 1 means rising condition & 1 to 0 means
falling condition of the edges.On the basis of
previous inputs or outputs fixed the present
state and next state.
9. DESIGN OF FLIP-FLOP
This Flip-flops is designed using logic gates.
• An Edge-triggeredFlip-flop responds only during the
brief instant of the of the clock switches from one
voltage level to another voltage level.When trigger
occurs it changes from positive to negative or vice-
versa.
• A Level-triggered Flip-flop response either in high
voltage or low voltage.
10. TYPES OF FLIP-FLOP
There are 5 types of flip-flop.
• SR FLIP-FLOP
• JK FLIP-FLOP
• D FLIP-FLOP
• T FLIP-FLOP
11. SR FLIP-FLOP(Set Reset)
THE TRUTH TABLE OF SR FLIP-FLOP
Qn S R Qn+1
0 0 0 0
0 0 1 0
0 1 0 1
0 1 1 1
1 0 0 1
1 0 1 0
1 1 0 1
12. JK FLIP-FLOP
The truth table of JK Flip-flop
Qn J K Qn+1
0 0 0 0
0 0 1 0
0 1 0 1
0 1 1 1
1 0 0 1
1 0 1 0
1 1 0 1
1 1 1 0