Lab report on inverter with transistor.

Name of the experiment:

Design an inverter with transistor.

Objective:

Our main objective is to study how a transistor acts as inverters.

Theory:

The NOT circuit has a single input and a single output and performs the operation of LOGIC NEGATION in accordance with the following definition: “The output of a Not circuit takes on the 1 state if and only if the input does not take on the 1 state”.

The transistor circuit of Fig. 1 implements an inverter for positive logic having a 0 state of V(0) = V_EE and a1 state of V(1) =V_CC. If the inputs is low, V_i =V (0), then the parameters are chosen so that the Q is OFF and hence V₀ = V_cc =V (1). On the other hand, if the input is high v_i =V (1). Then the circuit parameters are picked so that Q is in saturation and then v₀ =V_EE =V (0), if we neglect the collector-to-emitter saturation voltage V_CE(sat).

If input <0.75V (logic -o) [cutoff]

Then output = Vcc (logic -1)

And if input > 0.75 (logic -1) [saturation]

Then output = around (logic -0)

Required Equipment:

1.      Transistor (C828)

2.      Resistor (2.8KΩ)

3.      Trainer board

4.      Multimeter

5.      Connecting wire

Circuit Diagram:

Procedure:

1.      At first we connected the wire between components from the circuit diagram.

2.      Then we on the switch.

3.      Finally take the simulation result from the oscillator.

Experimental Data:

V_­cc =5V & R_c = 2.2KΩ 

Table:

Input	Output
1	LOGIC 0
0	LOGIC 1

Result:

Transistor is acting like an inverter. So we can say that our experiment was successfully.

Discussion:

1.      All the connection should be tight.

2.      We connect the all component with carefully.

3.       Always connect ground 1^st and then connect V_cc.

                                              

	Fig: An inverter circuit