1
GATE ECE 2017 Set 1
Numerical
+2
-0
In the figure shown, the npn transistor acts as a switch. GATE ECE 2017 Set 1 Analog Circuits - Bipolar Junction Transistor Question 9 English

For the input vin(t)as shown in the figure, the transistor switches between the cut-off and saturation regions of operation, when T is large. Assume collector-to-emitter voltage saturation VCE(sat) = 0.2V and base-to-emitter voltage VBE = 0.7V. The minimum value of the common-base current gain$$\left( \alpha \right)$$ of the transistor for the switching should be _________.

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2
GATE ECE 2017 Set 1
MCQ (Single Correct Answer)
+1
-0.3
The Miller effect in the context of a Common Emitter amplifier explains
A
an increase in the low-frequency cutoff frequency
B
an increase in the high-frequency cutoff frequency
C
a decrease in the low-frequency cutoff frequency
D
a decrease in the high-frequency cutoff frequency
3
GATE ECE 2017 Set 1
MCQ (Single Correct Answer)
+1
-0.3
For the operational amplifier circuit shown, the output saturation voltages are $$ \pm \,\,15V$$. The upper and lower threshold voltages for the circuit are, respectively. GATE ECE 2017 Set 1 Analog Circuits - Operational Amplifier Question 58 English
A
+5 V and -5V
B
+7 V and -3V
C
+3V and -7V
D
+3V and -3V
4
GATE ECE 2017 Set 1
Numerical
+2
-0
The amplifier circuit shown in the figure is implemented using a compensated operational amplifier (op-amp), and has an open-loop voltage gain, A0 105 V/V and an open-loop cut-off frequency, fC = 8 Hz. The voltage gain of the amplifier at 15 kHz, in V/V, is __________. GATE ECE 2017 Set 1 Analog Circuits - Operational Amplifier Question 11 English
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