When a LOW level is applied to a segment input, the LED is forward biased and current flows through it. Each segment is an LED that emits light when current flows through it. Lead Displays- One common type of seven segment display consists of light emitting diodes (LEDs).
#Digital techniques question paper code
Now from the 2 cell combinations, one variable and a dash in the same position can be combined to form the 4 cell combination.Īns This type of decoder accepts the BCD code on its input and provides output to energize seven-segment display devices in order to produce a decimal readout. Find the min terms which differ only by one variable to get 2 cell combinations. Step 3: Compare set 1 with set 2, set 2 with set 3, set 3 with set 4 and so on. Step 2: Arrange all the min terms in increasing order according to the number of 1’s in them. What are the steps of finding minimal SOP?Īns Step 1: Represent min terms in their binary representations. Checks 8,9,10,11,12, it must be 0 to have odd parity Checks 4,5,6,7,12, it must be 1 to have odd parity. Checks 2,3,6,7,10,11, it must be 0 to have odd parity. Checks 1,3,5,7,9,11, it must be 0 to have odd parity. There are 8 bits of data, so 4 parity bits are needed.Ī 12 bit code with bit positions will be:-ġ2 11 10 9 8 7 6 5 4 3 2 1 Position 1.
Q1.(b) Construct hamming code for 10111001 using odd parity.Īns. The Hamming Distance between two codes is defined as the number of bits changed from one code to another. It is a methodical way to add one or more parity bits to a data character in order to detect and correct errors. Hamming Code- It is used for error correction.
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