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Digital Circuits
Number System and Code Convertions
Marks 1Marks 2
Boolean Algebra
Marks 1Marks 2Marks 4Marks 5Marks 10
Logic Gates
Marks 1Marks 2Marks 5Marks 8
Combinational Circuits
Marks 1Marks 2Marks 5Marks 8Marks 10
Sequential Circuits
Marks 1Marks 2Marks 5Marks 8
Semiconductor Memories
Marks 1Marks 2
Logic Families
Marks 1Marks 2Marks 8
Analog to Digital and Digital to Analog Converters
Marks 1Marks 2
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1
GATE ECE 2007
MCQ (Single Correct Answer)
+2
-0.6
The circuit diagram of a standard TTL NOT gate is shown in the figure. When $${V_i}$$= 2.5V, the modes of operation of the transistors will be: GATE ECE 2007 Digital Circuits - Logic Families Question 2 English
A

$${Q_1}$$ :reverse active

$${Q_2}$$; normal active

$${Q_3}$$; :saturation;

$${Q_4}$$ :cut-off

B

$${Q_1}$$ :reverse active

$${Q_2}$$: saturation

$${Q_3}$$: saturation

$${Q_4}$$ : cut-off

C

$${Q_1}$$ : normal active

$${Q_2}$$; cut-off

$${Q_3}$$; cut-off

$${Q_4}$$ : saturation

D

$${Q_1}$$ : :saturation

$${Q_2}$$: :saturation

$${Q_3}$$ :saturation

$${Q_4}$$ : normal active

2
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
The DTL, TTL, ECL and CMOS families of digital ICs are compared in the following 4 columns GATE ECE 2003 Digital Circuits - Logic Families Question 4 English
A
P
B
Q
C
R
D
S
3
GATE ECE 1994
True or False
+2
-0
In the output stage of a standard TTL, we have a diode between the emitter of the pull up transistor and the collector of the pull-down transistor. The purpose of this diode is to isolate the output node from the power supply $${V_{cc}}$$.
A
TRUE
B
FALSE
4
GATE ECE 1987
MCQ (Single Correct Answer)
+2
-0.6
Given that for a logic family,

$${V_{OH}}$$ is the minimum output high-level voltage
$${V_{OL}}$$ is the minimum output low-level voltage
$${V_{IH}}$$ is the minimum output high-level voltage and
$${V_{IL}}$$ is the minimum output low-level voltage.
The correct relationship is:

A
$${V_{IH}}$$ >$${V_{OH}}$$ >$${V_{IL}}$$ >$${V_{OL}}$$
B
$${V_{OH}}$$ > $${V_{IH}}$$> $${V_{IL}}$$ >$${V_{OL}}$$
C
$${V_{IH}}$$>$${V_{OH}}$$ >$${V_{OL}}$$ >$${V_{IL}}$$
D
$${V_{OH}}$$ > $${V_{IH}}$$>$${V_{OL}}$$ >$${V_{IL}}$$
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Questions Asked from Marks 2
GATE ECE 2013 (1) GATE ECE 2008 (1) GATE ECE 2007 (1) GATE ECE 2003 (1) GATE ECE 1994 (1) GATE ECE 1987 (1)
GATE ECE Subjects
Signals and Systems
Network Theory
Control Systems
Digital Circuits
General Aptitude
Electronic Devices and VLSI
Analog Circuits
Engineering Mathematics
Microprocessors
Communications
Electromagnetics