GATE (Graduate Aptitude Test in Engineering) Electronics & CE (EC): Questions 54 - 57 of 1602
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Question 54
Appeared in Year: 2003
Question MCQ▾
Without any additional circuitry, an 8: 1 MUX can be used to obtain
Choices
Choice (4) | Response | |
---|---|---|
a. | Some but not all Boolean functions of 3 variables | |
b. | All functions of 3 variables but not all of 3 variables | |
c. | All functions of 3 variables and some but not all of 4 variables | |
d. | All functions of 4 variables |
Question 55
Appeared in Year: 2005
Question MCQ▾
The transistors used in a portion of the TTL gate show in the figure have b = 100. The base emitter voltage of is 0.7 V for a transistor in active region and 0.75 V for a transistor in saturation. If the sink current I = 1 A and the output is at logic 0, then the current IR will be equal to
Choices
Choice (4) | Response | |
---|---|---|
a. | 0.75 mA | |
b. | 1.00 mA | |
c. | 0.70 mA | |
d. | 0.65 mA |
Question 56
Appeared in Year: 2001
Question MCQ▾
In the TTL circuit in the figure, S2 and S0 are select lines and X7 and X0 are input lines. S0 and X0 are LSBs. The output Y is,
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |