Bsc CSIT Semester 1 – Physics – Unit 7: Universal Gates and Physics of Integrated Circuits (8 Hrs.)

The output of a digital circuit (y) is given by this expression:y = (AB + C̄BA)(B̄ + C̄)Where A, B and C represent inputs. Draw a circuit of above equation using OR, AND and NOT gate and hence find its truth table.

What are RTL and TTL gates? How memory and clock circuits can be made by using these gates? Show it. Explain their working scheme. Is it true that TTL logic gates are typically fabricated onto a single integrated circuit (IC)?

Describe processes involved in the fabrication of integrateds circuits include epitaxial growth, oxidation, oxide removal and pattern definition, doping (impurities in the Si), and interconnection of omponents.

Analyze the circuit shown in the figure below. Determine the logic function performed by the circuit by making and justifying the appropriate truth table.

Explain the meaning of “fabrication of integrated circuits” Describe following processes involved in the fabrication of integrated circuits: epitaxial growth, oxidation, oxide removal and patter definition, doping and interconnection of components.

The output of a digital circuit (y) is given by this expression: y = (A’B’+ B’A) ((A + B)’ + C) Where A, B and C represent inputs. Draw a circuit of above equation using OR, AND and NOT gate and hence find its truth table.

The output of a digital circuit (y) is given by this expression:

$\quad$ y = (C+ B’A) (A + B + D)’

Where A, B, C and D represent inputs. Draw a circuit of above equation using OR, AND and NOT gate and hence find its truth table.

Explain RTL and TTL gates. How memory and clock circuits can be made by using these gates? Explain how they work?

Describe the following process of IC production:

$\quad$(a) Oxidation,

$\quad$ (b) Pattern definition, and

$\quad$ (c) Doping.

Find the truth table for the circuit shown in the figure. What logic function will the circuit perform if the constant +5 V input to the first two gates is changed to ground potential?

The output of a digital circuit (y) is given by this expression:

where A,B and C represent inputs. Draw a circuit of the above equation using OR, AND and NOT gate and hence find its truth table.