Lab report of diode AND gate

Name of the experiment: Study of diode AND gate.

Objective: To design an AND gate.

Theory:  Figur-01 shows an AND gate. If V_A or V_B  both  are at logic 0 then diode D₁ or  D₂ or both D₁&D₂ is on respectively. If any one of  D₁&D₂ is on the V_cc goes to ground  through that, so the output will be Zero. If both V_A and V_B is high then D₁&D₂ is off and V_cc will be available at the output. i.e. The output is high. If above situation is happened then the experiment will be verified.

Required instrument:

a)     Diode×2

b)     Resistor(4.7kΩ×1)

c)     LED×1

Circuit Diagram:

Fig-01: AND gate

Procedure:

a)     We connected the instrument very carefully according to the circuit diagram.

b)     We checked the output for various combinations of input voltages (00, 01, 10, 11)

c)     We took the data and put them on data table.

Data Table:

VA	VB	Output
0	0	High (Logic level1)
0	1	Low (Logic level 0)
1	0	Low (Logic level 0)
1	1	Low (Logic level 0)

Result:

 The output is high only when both V_A and V_B is zero. In other cases the output is at logic level zero. So the circuit performs the operation of AND gate. Hence the experiment is verified.

Discussion: We connected the Circuit with proper precautionary.