Explain Tri-state logic inverter with the help of a circuit diagram. Give its Truth Table.

Ans:

Tri-state Logic Inverter:

The functional diagram of Tri-state Logic Inverter is demonstrated in fig.(a) and the logic diagram of this is demonstrated in fig.(b). While the control input is LOW, the drive is removed from T₃ and T₄. Thus both T3 and T4 are cut-off and the output is in the third state. While the control input is HIGH, the output Y is Logic 1 or 0 depending upon the data input.  Tri-state Logic Inverter's truth table is given in Table no.1

Fig.(a) Functional Diagram of Tri-state Logic Inverter

Fig.(b) Logic Diagram of Tri-state Logic Inverter

Table no.1 Truth Table of Tri-state Logic Inverter