6: Excess-3 Code to BCD Converter Combinational Circuit The Excess – 3 to BCD Code Converter has the following circuit diagram –įig. 5: Circuit Diagram of BCD to Excess 3 Converter The BCD to Excess – 3 Code Converter has the following circuit diagram –įig. 4: Circuit Diagram of Gray to Binary Code Converter The Gray to Binary Code Converter has the following circuit diagram –įig. 3: Circuit Diagram of Binary to Grey Code Converter The Binary to Gray Code Converter has the following circuit diagram –įig.

2: List of Components required for making SN-7400 Series IC based Code Converters With the knowledge of these code systems, Let us now start building the code converter circuits.įig.

1: Table listing Binary, Gray, BCD and Express-3 Coding for Decimal Digits The following table summarizes the binary representation of digits 0 to 9 in different code systems –įig. The Excess-3 code is similar to BCD numbering system with only difference that each 4-bit long value in the coded number is obtained by adding 3 to the BCD representation. So, the coded number is represented by weighted binary values where each value is 4-bit long and direct representation of the digits in the decimal number. The BCD numbering system is similar to binary representation of the decimal numbers except that the coded number is separated into four bits for each digit in the decimal number. Like in gray code, the binary numbers are ordered in such way that any two successive digits or values differ only by one bit. The different code systems have different binary numbers assigned to the digits. 在这个tuto代码转换电路设计rial will be used for conversion of digits 0 to 9 from one code system to another. In this tutorial, the following code conversion circuits will be designed – In the previous tutorial, the same series of digital ICs was used to construct arithmetic circuits like half adder, full adder, half subtractor and full subtractor. In this tutorial, code conversion circuits will be designed using SN7400 series of digital ICs. In such case, there must remain some code conversion circuit to make the interconnected digital systems compatible. The different digital systems may be using different code systems. Each code system has different binary numbers assigned to same symbols and characters.

In the first tutorial of this series – Introduction to Digital Electronics, it was mentioned that there are different code systems that are used to represent digital information as binary numbers.

Bcd to xs3 code converter smart