Question

a) A logic gate has nominal logic voltage levels of 0 and 5 V and the following characteristics: VIL = 1.5 V VIH = 3.5 V VOL = 0.1 V VOH = 4.8 V What value of noise voltage would be required to disturb the logic levels of the circuit? b) Implement the following Boolean function using an appropriate Multiplexer (MUX): F(A,B,C,D) = ?(1,2,4,5,8,9,13,14) c) It is required to detect only the presence of the codes 000, 010, 100, 110 and 111. An active-HIGH output is required to indicate their presence. Design a digital circuit using appropriate decoder and any additional logic gates with a single output that will indicate when any one of these codes is on the inputs. For any other code, the output must be LOW. (5 marks) (10 marks) (10 marks) [Total marks: 25]

          a) A logic gate has nominal logic voltage levels of 0 and 5 V and the
following characteristics:
VIL = 1.5 V
VIH = 3.5 V
VOL = 0.1 V
VOH = 4.8 V
What value of noise voltage would be required to disturb the logic levels of the
circuit?
b) Implement the following Boolean function using an appropriate
Multiplexer (MUX):
F(A,B,C,D) = ?(1,2,4,5,8,9,13,14)
c) It is required to detect only the presence of the codes 000, 010, 100, 110
and 111. An active-HIGH output is required to indicate their presence.
Design a digital circuit using appropriate decoder and any additional logic
gates with a single output that will indicate when any one of these codes is
on the inputs. For any other code, the output must be LOW.
(5 marks)
(10 marks)
(10 marks)
[Total marks: 25]

a) A logic gate has nominal logic voltage levels of 0 and 5 V and the
following characteristics:
VIL = 1.5 V
VIH = 3.5 V
VOL = 0.1 V
VOH = 4.8 V
What value of noise voltage would be required to disturb the logic levels of the
circuit?
b) Implement the following Boolean function using an appropriate
Multiplexer (MUX):
F(A,B,C,D) = ?(1,2,4,5,8,9,13,14)
c) It is required to detect only the presence of the codes 000, 010, 100, 110
and 111. An active-HIGH output is required to indicate their presence.
Design a digital circuit using appropriate decoder and any additional logic
gates with a single output that will indicate when any one of these codes is
on the inputs. For any other code, the output must be LOW.
(5 marks)
(10 marks)
(10 marks)
[Total marks: 25]

Added by Jose Carlos B.

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