1
GATE ECE 1997
MCQ (Single Correct Answer)
+1
-0.3
An Amplifier a has 6 dB gain and 50 $$\Omega $$ input and output impedances. The noise figure of this Amplifier as shown in the figure is 3 dB. A cascade of two such Amplifiers as in the figure will have a noise figure of GATE ECE 1997 Analog Circuits - Operational Amplifier Question 81 English 1 GATE ECE 1997 Analog Circuits - Operational Amplifier Question 81 English 2
A
6 dB
B
8 dB
C
12 dB
D
none of the above
2
GATE ECE 1996
MCQ (Single Correct Answer)
+1
-0.3
The circuit shown in the figure is that of GATE ECE 1996 Analog Circuits - Operational Amplifier Question 82 English
A
a non-inverting Amplifiers
B
an inverting Amplifier
C
an oscillator
D
a Schmitt trigger
3
GATE ECE 1995
Fill in the Blanks
+1
-0
In the given circuit if the voltage inputs V- and V+ are to be Amplified by the same Amplification factor, the value of 'R' should be GATE ECE 1995 Analog Circuits - Operational Amplifier Question 85 English
4
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
A change in the value of the Emitter resistance (Re in a difference Amplifier.
A
Affects the difference mode gain Ad
B
Affects the common mode gain Ac.
C
Affects both Ad and Ac
D
Does not affect either Ad (or) Ac.
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