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A. ON, on, on B. ON, OFF, OFF C. Off,on, OFF






D. OFF, OFF, ON E. OFF, OFF, OFF

 

 


LABORATORY WORK # 3.

LOGIC GATES.

 

Aims: define what logic gates are realized schematically, learn the gates’ properties. Compare experimental results with theoretical foundations about logic gates.

 

PREPARATION TO LAB WORK.

1 Learn the information about logic gates and integrated circuits (IC).

2 Show truth table of AND, OR, NOT, NAND, NOR, XOR, XNOR, buffer gates.

3 Consider experiments’ schemes and draw them with application of Scheme Design System. Analyze what gates are realized on the schemes’ basis.

4 Design XNOR gate for the experiment 3D on the basis of schemes in experiment 3A, 3B, 3C. Draw the XNOR scheme with application of Scheme Design System.

5 Answer the questions below in written form.

5.1 What logical operations do you know?

5.2 Show the algebraic expression of logical operation NOT (AND, OR and so on).

5.3 How many magnitudes has the logic value got?

5.4 What is integrated circuit (IC)?

5.5 What types of IC’s do you know?

5.6 What scales of IC’s integration do you know?

5.7 How many functions of 2 variables do you know?

5.8 Show the difference between complement and dual functions.

5.9 What function is called odd (even)?

5.10 What IC digital logic families do you know?

5.11 What is positive (negative) logic?

5.12 What are typical voltage levels for TTL, ECL, CMOS families?

5.13 What is fan-out, power dissipation, propagation delay, noise margin

5.14 Compare different IC digital logic families from point of view their typical special characteristics.

 






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