BE Lab Manual Experiment 5

 Experiment 5

Aim:-To study Gray to Binary Code Converter Circuit.

Apparatus: - Gray to Binary Code Converter Circuit kit, digital multimeter, patch chords.

Theory: - Code converter is a digital system that converts code from one form to another. Many a time’s data or information is available in one form and we require the data in another form. For such purpose a “Code Converter” is used. Gray to Binary Code Converter is one the type of Code Converter.

Binary Number System:-

The number system with base (or Radix) two is called a Binary number System. There are only two Symbols used in this system they are 0 & 1. These are known as bits. It is a Positional system. i.e. every position assigned a specific weight.

Gray Codes:-

The Gray Code is an unweighted Code. That means the position in the code groups do not have any specific weight assigned to them because of this, Gray Code is not suited for arithmetic operations. But it is used to reduce error while transmitting digital information from one place to another. The major advantage of the Gray Code is, only a single bit changes its logic when a decimal no changes from proceeding no to next no.

Conversion from Binary to Gray Code:-

  1. Copy the MSB of the Gray number as it is in Binary code.
  2. Add the MSB of binary with the next MSB of the Gray code and record the sum.
  3. Ignore the carry if any continue this process up to LSB of Gray code.

 

The following table shows the 4 bit Gray equivalent of the 4-bit Binary number.


Procedure:-

(1)   Study the circuit provided on the front panel of the kit.

(2)   Switch ‘ON’ the power supply.

(3)   Note down the voltage at D0 to D3 for logic 1 & logic 0.

(4)   Apply the logic to the G3 to G0 from logic input using patch chords.

(5)   Connect the output’s B3 to B0 to the logic output indicator using patch chords.

(6)   Verify and note down the Binary number for the Gray code.

Result: - The Gray to Binary Code Converter Circuit is studied and the Truth table is verified.



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