### Flip flop Conversion – SR flip-flop to JK flip-flop

Here you would see how to implement a JK flip-flop from SR flip-flop step by step – “Flip flop Conversion – SR flip-flop to JK flip-flop”.

__Flip flop Conversion – SR flip-flop to JK flip-flop__

### Step 1: Write the truth table of the required flip-flop

Here the required flip-flop is JK flip-flop

Hence you need to write the truth table of JK flip-flop which is

J |
K |
Q |
Q |

0 |
0 |
0 |
0 |

0 |
0 |
1 |
1 |

0 |
1 |
0 |
0 |

0 |
1 |
1 |
0 |

1 |
0 |
0 |
1 |

1 |
0 |
1 |
1 |

1 |
1 |
0 |
1 |

1 |
1 |
1 |
0 |

### Step 2: Write the excitation table of the given flip-flop

In this case the given flip-flop is SR flip-flop

Therefore you need to write the excitation table of SR flip-flop which is

Q |
Q |
S |
R |

0 |
0 |
0 |
X |

0 |
1 |
1 |
0 |

1 |
0 |
0 |
1 |

1 |
1 |
X |
0 |

### Step 3: Write the conversion table

The conversion table, which is a combination of truth table and excitation table, to implement a JK flip-flop from SR flip-flop is as follows

J |
K |
Q |
Q |
S |
R |

0 |
0 |
0 |
0 |
0 |
X |

0 |
0 |
1 |
1 |
X |
0 |

0 |
1 |
0 |
0 |
0 |
X |

0 |
1 |
1 |
0 |
0 |
1 |

1 |
0 |
0 |
1 |
1 |
0 |

1 |
0 |
1 |
1 |
X |
0 |

1 |
1 |
0 |
1 |
1 |
0 |

1 |
1 |
1 |
0 |
0 |
1 |

### Step 4: Find the Boolean expressions for the inputs of the given flip-flop.

In this case the given flip-flop is SR.

Therefore, write the Boolean expressions for S and R from the conversion table using K-Maps.

K-Map for S:

Expression for S would be

S = JQ_{N}^{/}

K-Map for R:

Expression for R would be

R = KQ_{N}

### Step 5: Draw the circuit for implementing JK flip-flop using SR flip-flop

In
this way a JK flip-flop can be implemented using a SR flip-flop. Hope this post
on “**Flip-flop Conversion – SR flip-flop to JK flip-flop**” would help in clearing
many doubts in flip-flop conversions.

**Related Links:**

- Flip-flop Conversion – SR flip-flop to D flip-flop
- Flip-flop Conversion – JK flip-flop to D flip-flop
- Flip-flop Conversion – D flip-flop to SR flip-flop
- Flip-flop Conversion – JK flip-flop to SR flip-flop
- Flip-flop Conversion – JK flip-flop to T flip-flop
- Flip-flop Conversion – T flip-flop to D flip-flop
- Flip-flop Conversion – T flip-flop to SR flip-flop
- Flip flop Conversion – D flip-flop to T flip-flop
- Flip flop Conversion – SR flip-flop to T flip-flop
- Flip flop Conversion – T flip-flop to JK flip-flop
- Flip flop Conversion – D flip-flop to JK flip-flop

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