EASTERN MEDITERRANEAN UNIVERSITY

DEPARTMENT OF ELECTRICAL & ELECTRONICS ENGINEERING

EENG342 ELECTRONICS II

EXPERIMENT 5

TRIANGLE WAVE GENERATOR USING A SCHMIDT TRIGGER

Std. No. and Name:

1______

2______

3______

Group No : ______

Date : ______

Object: This experiment illustrates how a Schmidt Trigger and an integrator can be used to set up a triangle wave generator. This circuit is also an example to a voltage-controlled oscillator, where the frequency of the output signal can be controlled by means of a variable voltage.

Step 1: Connect the circuit shown in the figure below. Make sure that the ± 15 V supplies of the comparator and the op-amp are properly connected.


Step 2: For VR= 0, 1, 2 V and VS= 0 V observe and plot the output (Vo) and the Schmidt Trigger output (Vst) to the provided graph paper for VR= 1 V.

Step 3: For VR= 0 V and VS= 5, 7 V observe and plot the output (Vo) and the Schmidt Trigger output (Vst) to the provided graph paper VS= 5 V.

Step 4: Measure the frequency of the output voltage for all the cases in step 2 and step 3. Compare these with the theoretical values.

Step 2 / Step 3
VS= 0 V / VR= 0 V
VR (V) / T (s) / f (Hz) / VS (V) / T (s) / f (Hz)
0 / 5
1 / 7
2

QUESTIONS:

Q1) Comment on all the experimental results you have obtained. Explain any differences between them and what is expected.

Q2) Give an account of any differences between experimental results and theoretical calculations in Step 4.

CONCLUSIONS:

State what general conclusions you draw from this experiment, pointing out the difficulties you have encountered and how you have solved them.

EXPERIMENT NO:……7…………

Graph Name: VR= 1 V, VS= 0 V

Graph Name: VR= 0 V, VS= 5 V

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