> Flip-flop truth tables,excitation tables and conversions. - TECH UPDATE
Flip-Flop truth tables and excitation tables:

1 1)    R-S flip-flop: -The truth table and excitation tables of R-S flip are
Truth table of R-S filp-flop

 Sn Rn Qn+1 0 0 Qn 0 1 0 1 0 1 1 1 ?

Excitation table of R-S flip-flop

 Present output Next output input Qn Qn+1 Sn Rn 0 0 0 X 0 1 1 0 1 0 0 1 1 1 X 0

Note: - Here X is either 0 or 1.

2) J-K Flip-Flop: -  The truth tables and excitation of j-k flip flops are

Truth table
 Jk Kn Qn+1 0 0 Qn 0 1 0 1 0 1 1 1 ~Qn

Excitation table of j-k flip-flop
 Present output Next output input Qn Qn+1 Jn Kn 0 0 0 X 0 1 1 X 1 0 X 1 1 1 X 0

3) T Flip-flop:- Truth table and excitation table of T Flip-flop
Truth table
 Tn Qn+1 0 Qn 1 ~Qn

Excitation table
 present output Qn Next output Qn+1 input Tn 0 0 0 0 1 1 1 0 1 1 1 0

4) D Flip-flop:- The truth table and excitation tables of D flip-flops are
Truth table of D flip-flop
 Dn Qn+1 0 0 1 1

Excitation table of D flip-flop
 present output Qn Next output Qn+1 input Tn 0 0 0 0 1 1 1 0 0 1 1 1

These are S-R, J-K, T, D flip flops truth tables and excite tabes by using these tables we can convert from one to other like S-R to J-K etc.
Above both truth tables and excitation tables are very important for conversion from one flip to another flip-flops.

Few important conversions are:
1) S-R Flip-flop to T Flip-flop: - The excitation table for S-R flip-flop to T flip-flop conversion is
 Input T Present state Qn Next state Qn+1 Flip-flop inputs S R S R 0 0 0 0 0 0 X 0 1 0 1 1 0 0 X 0 1 0 1 0 1 1 0 1 0 1 1 0 0 1 0 1

This is conversion table for S-R flip-flop to T flip-flop conversion. After draw a k- map of s and R you will get a circuit T flip-flop using S-R flip-flop.

2)S-R Flip-flop to D Flip-flop: - The excitation table for S-R flip-flop to D flip-flop conversion is

 Input D Present state Qn Next state Qn+1 Flip-flop inputs S R S R 0 0 0 0 0 0 X 0 1 0 1 0 0 1 0 1 1 0 1 1 0 1 0 1 1 1 0 0 X 0 1 0
This is conversion table for S-R flip-flop to D flip-flop conversion. After draw a k- map of s and R you will get a circuit D flip-flop using S-R flip-flop.
3)S-R Flip-flop to J-K Flip-flop: - The excitation table for S-R flip-flop to J-K flip-flop conversion
 Input Present state Next state Flip-flop inputs J K Qn Qn+1 S R S R 0 0 0 0 0 0 0 X 0 1 0 0 1 1 0 0 X 0 1 0 0 1 0 0 0 0 0 X 0 1 0 1 1 0 0 1 0 1 1 0 0 1 1 0 1 0 1 0 1 1 0 0 X 0 1 0 1 1 0 1 1 0 1 0 1 1 1 0 0 1 0 1
This is the excitation table for S-R flip-flop to J-K flip-flop. Remember before learn conversation table just note down truth table and excitation tables of the flip flops.
4)T flip-flop to D flip-flop: - The excitation table for T flip-flop to
D flip-flop conversation
 Input D Present state Qn Next state Qn+1 Flip-flop input T 0 0 0 0 0 1 0 1 1 0 1 1 1 1 1 0

5)D flip-flop to T flip-flop: - The excitation table for D flip-flop to T flip-flop conversion is

 Input T Present state Qn Next state Qn+1 Flip-flop input T 0 0 0 0 0 1 1 1 1 0 1 1 1 1 0 0
6)J-k flip flop to T flip-flop: -The excitation table for j-k flip flop to T flip flop conversation
 Input T Present state Qn Next state Qn+1 Flip-flop inputs J K J K 0 0 0 0 0 0 X 0 1 0 1 1 0 0 X 0 1 0 1 0 1 1 0 1 X 1 1 1 1 0 0 1 X 1 1 1

Before learn the conversation just read and note down the truth tables and excitation tables of every flip flops .

7) J-K flip flop to D flip flop: - The excitation table for j-k flip flop to D flip flop conversation
 Input D Present state Qn Next state Qn+1 Flip-flop inputs J K J K 0 0 0 0 0 0 X 0 1 0 1 0 0 1 X 1 1 1 1 0 1 0 0 0 X 0 1 1 1 1 0 0 X 0 1 0

#### Almost i provide all conversions in case of any missing conversions design your own truth table using truth tables and excitation tables.

Remember before learn the conversions just note down the truth tables and excitation tables of total flip flops which is very helpful for understanding the flip flop conversions.
Flip-flop truth tables,excitation tables and conversions. Reviewed by TECH UPDATE on February 05, 2018 Rating: 5