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Analog Circuits
Bipolar Junction Transistor
Marks 1Marks 2Marks 5
FET and MOSFET
Marks 1Marks 2Marks 5Marks 8
Oscillators
Marks 1Marks 2Marks 5
Operational Amplifier
Marks 1Marks 2Marks 5Marks 8
555 Timer
Marks 1Marks 2Marks 5
Frequency Response
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Diodes
Marks 1Marks 2
Feedback Amplifier
Marks 1Marks 2
Power Amplifier
Marks 1Marks 2
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1
GATE ECE 2001
MCQ (Single Correct Answer)
+2
-0.6
An npn BJT has gm = 38 mA/V, $${C_\mu }\, = {10^{ - 14}}$$ F, $${C_\pi }\, = 4\, \times {10^{ - 13}}\,F$$ and DC current gain $$\beta \, = \,90$$. For this transistor fT and $${f_\beta }$$ are
A
$$\eqalign{ & {f_T} = 1.64 \times {10^8}\,\,Hz\,and \cr & {f_\beta } = 1.47 \times {10^{10}}\,\,Hz \cr} $$
B
$$\eqalign{ & {f_T} = 1.47 \times {10^{10}}\,\,Hz\,and \cr & {f_\beta } = 1.64 \times {10^8}\,\,Hz \cr} $$
C
$$\eqalign{ & {f_T} = 1.33 \times {10^{12}}\,\,Hz\,and \cr & {f_\beta } = 1.47 \times {10^{10}}\,\,Hz \cr} $$
D
$$\eqalign{ & {f_T} = 1.47 \times {10^{10}}\,\,Hz\,and \cr & {f_\beta } = 1.33 \times {10^{12}}\,\,Hz \cr} $$
2
GATE ECE 1999
MCQ (Single Correct Answer)
+2
-0.6
An NPN transistor (with $${C_\pi }\,\, = \,\,0.3\,\,$$ pf) has a unity gain cutoff frequency $${f_T}$$ of 400 MHz at a DC-bias current Ic = 1mA. The value of its $${C_\mu }$$ (in pf) is approximately $$\left( {{V_T}\, = \,26\,mV} \right)$$.
A
15
B
30
C
50
D
96
3
GATE ECE 1999
MCQ (Single Correct Answer)
+2
-0.6
An amplifier is assumed to have a single pole high frequency transfer function. The rise time of its output response to a step function input is 35 nsec. The upper 3 dB frequency (in MHz) for the amplifier to a sinusoidal input is approximately at
A
4.55
B
10
C
20
D
28.6
4
GATE ECE 1996
MCQ (Single Correct Answer)
+2
-0.6
In the circuit shown in Fig. is a finite gain amplifier with a gain of K, a very large input impedance, and a very low output impedance. The input impedance of the feedback amplifier with the feedback impedance Z conducted as shown will be GATE ECE 1996 Analog Circuits - Frequency Response Question 8 English
A
$$Z\left[ {1 - {1 \over K}} \right]$$
B
$$Z\left( {1 - K} \right)$$
C
$$\left[ {{Z \over {K - 1}}} \right]$$
D
$$\left[ {{Z \over {1 - K}}} \right]$$
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Questions Asked from Marks 2
GATE ECE 2010 (2) GATE ECE 2003 (1) GATE ECE 2001 (1) GATE ECE 1999 (2) GATE ECE 1996 (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