1
GATE ECE 2017 Set 2
Numerical
+2
-0
In the circuit shown, transistors Q1 and Q2 are biased at a collector current of 2.6 mA.
Assuming that transistor current gains are sufficiently large to assume collector current equal
to emitter current and thermal voltage of 26m V, the magnitude of voltage gain Vo/Vs
in the
mid-band frequency range is _____________ (up to second decimal place).
![GATE ECE 2017 Set 2 Analog Circuits - Bipolar Junction Transistor Question 9 English](https://gateclass.cdn.examgoal.net/examside/questions/0909b9f4f3333fe1839e9b10b713945309bc92f04839fbfe54e221f46758aa53.jpg)
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2
GATE ECE 2015 Set 2
Numerical
+2
-0
In the ac equivalent circuit shown, the two BJTs are biased in active region and have identical
parameters with β >> 1. The open circuit small signal voltage gain is approximately _______.
![GATE ECE 2015 Set 2 Analog Circuits - Bipolar Junction Transistor Question 12 English](https://gateclass.cdn.examgoal.net/examside/questions/403312f6321ac08e7db86fe3394e5e4818c724c557781d92879570efbd909e12.jpg)
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3
GATE ECE 2015 Set 1
Numerical
+2
-0
In the circuit shown, I1 = 80 mA and I2 b= 4mA. Transistors T1 and T2 are identical. Assume that the thermal voltage VT is 26 mV at 27oC. At 50oC, the value of the voltage V12 = V1 - V2 (in mV) is _______.
![GATE ECE 2015 Set 1 Analog Circuits - Bipolar Junction Transistor Question 13 English](https://gateclass.cdn.examgoal.net/examside/questions/39a88e46541ee47c3230178db94a4f9a065c81ef68f742067ea9c87bd1e8125c.jpg)
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4
GATE ECE 2014 Set 4
MCQ (Single Correct Answer)
+2
-0.6
Consider the common-collector amplifier in the figure (bias circuitry ensures that the transistor
operates in forward active region, but has been omitted for simplicity). Let IC be the collector
current, VBE be the base-emitter voltage and VT be the thermal voltage. Also, 𝑔m and 𝑟o are the small-signal transconductance and output resistance of the transistor, respectively. Which one of the
following conditions ensures a nearly constant small signal voltage gain for a wide range of values
of RE?
![GATE ECE 2014 Set 4 Analog Circuits - Bipolar Junction Transistor Question 16 English](https://gateclass.cdn.examgoal.net/examside/questions/0132c099a695185329c852f5349c36c339704107f26c3be7e29406a9969075a2.jpg)
Questions Asked from Bipolar Junction Transistor (Marks 2)
Number in Brackets after Paper Indicates No. of Questions
GATE ECE 2024 (1)
GATE ECE 2017 Set 1 (2)
GATE ECE 2017 Set 2 (1)
GATE ECE 2015 Set 2 (1)
GATE ECE 2015 Set 1 (1)
GATE ECE 2014 Set 4 (3)
GATE ECE 2014 Set 3 (1)
GATE ECE 2014 Set 1 (2)
GATE ECE 2013 (1)
GATE ECE 2012 (1)
GATE ECE 2011 (2)
GATE ECE 2009 (1)
GATE ECE 2008 (2)
GATE ECE 2007 (2)
GATE ECE 2006 (3)
GATE ECE 2005 (2)
GATE ECE 2004 (1)
GATE ECE 2003 (2)
GATE ECE 2000 (1)
GATE ECE 1996 (2)
GATE ECE 1992 (1)
GATE ECE 1991 (1)
GATE ECE 1990 (2)
GATE ECE 1989 (1)
GATE ECE 1988 (4)
GATE ECE Subjects
Signals and Systems
Representation of Continuous Time Signal Fourier Series Discrete Time Signal Fourier Series Fourier Transform Discrete Time Signal Z Transform Continuous Time Linear Invariant System Transmission of Signal Through Continuous Time LTI Systems Discrete Time Linear Time Invariant Systems Sampling Continuous Time Signal Laplace Transform Discrete Fourier Transform and Fast Fourier Transform Transmission of Signal Through Discrete Time Lti Systems Miscellaneous Fourier Transform
Network Theory
Control Systems
Digital Circuits
General Aptitude
Electronic Devices and VLSI
Analog Circuits
Engineering Mathematics
Microprocessors
Communications
Electromagnetics