1
GATE ECE 2010
MCQ (Single Correct Answer)
+1
-0.3
In the silicon BJT circuit shown below, assume that the emitter area of transistor Q1 is half that of transistor Q2.The value of current I0 is approximately GATE ECE 2010 Analog Circuits - Bipolar Junction Transistor Question 56 English
A
0.5 mA
B
2 mA
C
9.3 mA
D
15 mA
2
GATE ECE 2010
MCQ (Single Correct Answer)
+1
-0.3
The amplifier circuit shown below uses a silicon transistor. The capacitors CC and CE can be assumed to be short at signal frequency and the effect of output resistance r0 can be ignored. If CE is disconnected from the circuit, which one of the following statements is TRUE? GATE ECE 2010 Analog Circuits - Bipolar Junction Transistor Question 55 English
A
The input resistance Ri increases and the magnitude of voltage gain AV decreases
B
The input resistance Ri decreases and the magnitude of voltage gain AV decreases
C
Both input resistance Ri and the magnitude of voltage gain AV decrease
D
Both input resistance Ri and the magnitude of voltage gain AV increase
3
GATE ECE 2010
MCQ (Single Correct Answer)
+2
-0.6
Consider the common emitter amplifier shown below with the following circuit parameters:


$$\beta = 100,\,{g_m} = 0.3861\,{\rm A}/V,\,{r_0} = \infty ,\,{r_\pi } = 259\,\Omega, $$
$${R_s} = 1\,K\Omega ,{R_B} = 93\,K\Omega ,\,{R_C} = 250\,\Omega, $$
$${R_L} = 1\,K\Omega ,\,{C_1} = \infty \,\,and\,\,{C_2} = 4.7\,\mu F.$$

GATE ECE 2010 Analog Circuits - Frequency Response Question 2 English

The lower cut-off frequency due to C2 is

A
33.9 Hz
B
27.1 Hz
C
13.6 Hz
D
16.9 Hz
4
GATE ECE 2010
MCQ (Single Correct Answer)
+2
-0.6
Consider the common emitter amplifier shown below with the following circuit parameters:


$$\beta = 100,\,{g_m} = 0.3861\,{\rm A}/V,\,{r_0} = \infty ,\,{r_\pi } = 259\,\Omega, $$
$${R_s} = 1\,K\Omega ,{R_B} = 93\,K\Omega ,\,{R_C} = 250\,\Omega, $$
$${R_L} = 1\,K\Omega ,\,{C_1} = \infty \,\,and\,\,{C_2} = 4.7\,\mu F.$$

GATE ECE 2010 Analog Circuits - Frequency Response Question 3 English

The Resistance seen by the source Vs is

A
$$258\Omega $$
B
$$1258\Omega $$
C
$$93\Omega $$
D
$$100\Omega $$
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