Name– study of 4–bit controlled inverter using IC 7486.
Aim – to study working of controlled inverter.
Apparatus – IC 7486, circuit board, power supply +5V DC, LEDs, connecting wires, soldering iron, cutter etc.
Circuit diagram
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Procedure –
1) Identify the given IC.
2) Construct the circuit of 4–bit controlled inverter using given Ex-OR gate IC. Solder the pieces of wires for connections.
3) The outputs of four gates are already connected to the four LEDs.
4) Now keep control input = 0 and connect input data such as PQRS = 1010.
5) Observe the output of the circuit.
6) Note down the output condition of ABCD in the observation table.
7) Repeat the steps 4 to 7 for at least two readings.
8) Now keep control input = 1 and connect another input data such as PQRS = 1110.
9) Observe the output ABCD of the circuit.
10) Note down the output condition in observation table.
11) Repeat the steps 8 to 10 for at least two readings.
Brief theory –
Exclusive-OR gate – it is a very special type of gate in digital electronics. It is a logic circuit whose output becomes high only when its both inputs are UNEQUAL. Its logic equation is –
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