## What must be done to change the circuit to an excess-3 to BCD code converter?

What must be done to change the circuit to an excess-3-to-BCD-code converter? Feed BCD-code to the 4-bit adder as the first operand. Feed constant 3 as the second operand. The output is the corresponding excess-3 code.

**What is the use of BCD to excess 3 code converter?**

Excess-3 binary code is a unweighted self-complementary BCD code. Self-Complementary property means that the 1’s complement of an excess-3 number is the excess-3 code of the 9’s complement of the corresponding decimal number.

### Which IC is used in BCD to excess 3 code conversion?

For BCD to Excess-3 code converter using logic gates:

IC Number | IC Name |
---|---|

74LS08 | Quad 2-input AND Gates |

74LS86 | Quad 2-input Exclusive-OR Gates |

74LS32 | Quad 2-input OR Gates |

74LS04 | Hex Inverting Gates |

**What is Excess-3 code example?**

For example: If we perform 1’s complement of the excess-3 code 1000(decimal 5), complement value will be 0111, which is the excess-3 code of 9’s complement of 5, i.e., 4(0111)….The Excess-3 code for the decimal number is as follows:

Decimal Digit | BCD Code | Excess-3 Code |
---|---|---|

3 | 0011 | 0110 |

4 | 0100 | 0111 |

5 | 0101 | 1000 |

6 | 0110 | 1001 |

## How do you solve excess 3?

The operation of addition can be done by very simple method we will illustrate the operation in a simple way using steps. We have to convert the numbers (which are to be added) into excess 3 forms by adding 0011 with each of the four bit groups them or simply increasing them by 3.

**Is BCD a self complementing code?**

This code has all positive weights. Sum of weights of unnatural BCD codes is equal to 9. It is a self-complementing code. Self-complementing codes provide the 9’s complement of a decimal number, just by interchanging 1’s and 0’s in its equivalent 2421 representation.

### What is 2421 BCD code?

The Aiken code (also known as 2421 code) is a complementary binary-coded decimal (BCD) code. A group of four bits is assigned to the decimal digits from 0 to 9 according to the following table.

**Why BCD is called 8421 code?**

BCD Codes. The BCD8421 code is so called because each of the four bits is given a ‘weighting’ according to its column value in the binary system. The least significant bit (lsb) has the weight or value 1, the next bit, going left, the value 2.

## Is BCD a self-complementing code?

**How do you convert GREY code to excess code 3?**

Excess-3 Code is a non-weighted BCD (8421) Code. Excess-3 Code is derived from 8421 code by adding 0011 (3) to all code groups….Excess-3 Code.

Decimal Numbers | Binary Numbers | Excess-3 Code (Binary Number + 0011) |
---|---|---|

2 | 0010 | 0101 |

3 | 0011 | 1100 |

4 | 0100 | 0111 |

5 | 0101 | 1000 |

### How do you write an excess-3 code?

We can easily get an excess-3 code of a decimal number by simply adding 3 to each decimal digit. And then we write the 4-bit binary number for each digit of the decimal number….The Excess-3 code for the decimal number is as follows:

Decimal Digit | BCD Code | Excess-3 Code |
---|---|---|

2 | 0010 | 0101 |

3 | 0011 | 0110 |

4 | 0100 | 0111 |

5 | 0101 | 1000 |

**How to design a BCD to excess-3 circuit?**

In this topic, you study how to design BCD to Excess-3 Code Converter Circuit and draw the logic diagram. The BCD (binary coded decimal) code is basically 8421 code and the conversion of 4-bit input BCD code ( A B C D) into the excess-3 code output ( W X Y Z) as shown in truth table 1.

## How to convert BCD code to Excess-3 code?

The BCD (binary coded decimal) code is basically 8421 code and the conversion of 4-bit input BCD code ( A B C D) into the excess-3 code output ( W X Y Z) as shown in truth table 1. Table 1: BCD to Excess-3 Code Converter. From this truth table, the K-maps are drawing shown in Figure 1, to obtain a minimized expression for each output.

**How to find a digital circuit using Excess-3 code?**

To find the corresponding digital circuit, we will use the K-Map technique for each of the Excess-3 code bits as output with all of the bits of the BCD number as input. Excess-3 code can be converted back to BCD in the same manner.

### Which is an example of a BCD conversion?

To understand the process of converting BCD to Excess-3, it is required to have knowledge of Number System and Number Base Conversion. The Excess-3 binary code is an example of a self-complementary BCD code.