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# Binary to Gray Code Converter and Grey to Binary Code Converter

The logical circuit which converts binary code to equivalent gray code is known as binary to gray code converter. The gray code is a non weighted code. The successive gray code differs in one bit position only that means it is a unit distance code. It is also referred as cyclic code. It is not suitable for arithmetic operations. It is the most popular of the unit distance codes. It is also a reflective code. An n-bit Gray code can be obtained by reflecting an n-1 bit code about an axis after 2n-1 rows, and putting the MSB of 0 above the axis and the MSB of 1 below the axis. Reflection of Gray codes is shown below. The 4 bits binary to gray code conversion table is given below, That means, in 4 bit gray code, (4-1) or 3 bit code is reflected against the axis drawn after (24-1)th or 8th row. The bits of 4 bit gray code are considered as G4G3G2G1. Now from conversion table, From above SOPs, let us draw K -maps for G4, G3, G2 and G1.

## Grey to Binary Code Converter

In gray to binary code converter, input is a multiplies gray code and output is its equivalent binary code.

Let us consider a 4 bit gray to binary code converter. To design a 4 bit gray to binary code converter, we first have to draw a conversion table. From above gray code we get,

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