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1
GATE ECE 2001
MCQ (Single Correct Answer)
+1
-0.3
The current gain of a BJT is
A
$$g_mr_o$$
B
$$\frac{g_m}{r_o}$$
C
$$g_mr_\mathrm\pi$$
D
$$\frac{g_m}{r_\mathrm\pi}$$
2
GATE ECE 2000
MCQ (Single Correct Answer)
+1
-0.3
Introducing a resistor in the emitter of a common amplifier, stabilizes the dc operating point against variations in
A
only the temperature
B
only the β of the transistor
C
both temperature and β
D
none of the above
3
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
In a series regulated power supply circuit, the voltage gain Av of the ‘pass’ transistor satisfies the condition:
A
$$A_v\rightarrow\infty$$
B
$$1\;\ll\;A_v\;\ll\;\infty$$
C
$$A_v\;\approx\;1$$
D
$$A_v\;\ll\;1$$
4
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
The emitter coupled pair of BJT’s gives a linear transfer relation between the differential output voltage and the differential input voltage Vid only. When the magnitude of Vid is less than '$$\alpha$$' times the thermal voltage, where '$$\alpha$$' is
A
4
B
3
C
2
D
1
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GATE ECE Subjects

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General Aptitude
Verbal Ability Logical Reasoning Numerical Ability
Network Theory
Network Elements State Equations For Networks Network Graphs Miscellaneous Sinusoidal Steady State Response Network Theorems Two Port Networks Transient Response
Microprocessors
Pin Details of 8085 and Interfacing with 8085 Instruction Set and Programming with 8085
Signals and Systems
Discrete Fourier Transform and Fast Fourier Transform Discrete Time Signal Fourier Series Fourier Transform Continuous Time Signal Laplace Transform Fourier Transform Representation of Continuous Time Signal Fourier Series Transmission of Signal Through Continuous Time LTI Systems Miscellaneous Sampling Continuous Time Linear Invariant System Discrete Time Linear Time Invariant Systems Discrete Time Signal Z Transform Transmission of Signal Through Discrete Time Lti Systems
Electromagnetics
Maxwell Equations Transmission Lines Uniform Plane Waves Antennas Waveguides Miscellaneous
Digital Circuits
Sequential Circuits Number System and Code Convertions Logic Gates Combinational Circuits Semiconductor Memories Logic Families Analog to Digital and Digital to Analog Converters Boolean Algebra
Electronic Devices and VLSI
IC Basics and MOSFET PN Junction BJT and FET Semiconductor Physics
Control Systems
Time Response Analysis Signal Flow Graph and Block Diagram State Space Analysis Basic of Control Systems Compensators Root Locus Diagram Stability Frequency Response Analysis
Communications
Fundamentals of Information Theory Noise In Digital Communication Digital Communication Systems Random Signals and Noise Analog Communication Systems
Engineering Mathematics
Probability and Statistics Linear Algebra Complex Variable Transform Theory Vector Calculus Differential Equations Calculus Numerical Methods
Analog Circuits
Frequency Response Operational Amplifier Power Amplifier Diodes Oscillators Feedback Amplifier 555 Timer Bipolar Junction Transistor FET and MOSFET
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