Why doesnt this Multiplexer based on threestate gates work O

Why doesn\'t this Multiplexer based on three-state gates work? Outputs must not be connected Inverter in one of the select lines missing Inverter at the output of the buffers missing Resistor at the output of the buffers missing

Solution

The three-state output is called a tristate because it has three output states: (1) high, (2) low (3) high impedance. A tristate buffer is a useful device that allows us to control when current passes through the device and when does not.

The correct option is (b) Inverter in one of the select lines missing.

This option is correct because the output which is required is high but according to the given circuit the output comes out to be low. Thus, there is requirement of an inverter in one of the select lines.