A certain system has transfer function 
a is a parameter. Consider the standard negative unity feedback configuration as shown below.
Which of the following statements is true?
-
The closed loop system in never stable for any value of a a -
For some positive values of a, the closed loop system is stable, but not for all positive values -
For all positive values of a, the closed loop system is stable -
The closed loop system is stable for all values of a, both positive and negative
A radar receiver has a noise figure ofdB atK having a bandwidth of 2.5 MHz. The minimum power it can receive is
-
3.45 x 10-15 W -
1.38 x 10-15 W -
7.5 x 10-15 W -
93.15 x 10-15 W
What is the propagation constant for air filled wave guide with dimensions a = 1.and b = 0.at 4.GHz?
-
0.6698 -
0.7698 -
0.503 -
0.6598
A discrete time linear shift-invariant system has an impulse response h[n] with h[=h[= -h[-and zero otherwise. The system is given an input sequence x[n] with x[- x[-and zero otherwise. The number of nonzero samples in the output sequence y[n], and the value of y[are, respectively
-
5, 2 -
6, 2 -
6, 1 -
5, 3
A radar receiver has a noise figure ofdB atK having a bandwidth of 2.5 MHz. The minimum power it can receive is
-
3.45 x 10-15 W -
1.38 x 10-15 W -
7.5 x 10-15 W -
93.15 x 10-15 W
Find Y- parameters
-
-
-
-
None of these
A certain system has transfer function a is a parameter. Consider the standard negative unity feedback configuration as shown below.
Which of the following statements is true?
-
The closed loop system in never stable for any value of a a -
For some positive values of a, the closed loop system is stable, but not for all positive values -
For all positive values of a, the closed loop system is stable -
The closed loop system is stable for all values of a, both positive and negative
ωL =
-
108 rad/sec -
104 rad/sec -
102 rad/sec -
10 rad/sec
What is the propagation constant for air filled wave guide with dimensions a = 1.and b = 0.at 4.GHz?
-
0.6698 -
0.7698 -
0.503 -
0.6598
A radar receiver has a noise figure ofdB atK having a bandwidth of 2.5 MHz. The minimum power it can receive is
-
3.45 x 10-15 W -
1.38 x 10-15 W -
7.5 x 10-15 W -
93.15 x 10-15 W
A n-channel JFET has IDSS = 2 mA, Gate to source voltage VGS = - 2 V and trans-conductance is 0.5 mW then pinch-off voltage is __________ .
-
- 2 V -
2 V -
- 4 V -
4 V
The truth table corresponding to the given input digital gate :
A n-channel JFET has IDSS = 2 mA, Gate to source voltage VGS = - 2 V and trans-conductance is 0.5 mW then pinch-off voltage is __________ .
-
- 2 V -
2 V -
- 4 V -
4 V
What is the propagation constant for air filled wave guide with dimensions a = 1.and b = 0.at 4.GHz?
-
0.6698 -
0.7698 -
0.503 -
0.6598
A discrete time linear shift-invariant system has an impulse response h[n] with h[=h[= -h[-and zero otherwise. The system is given an input sequence x[n] with x[- x[-and zero otherwise. The number of nonzero samples in the output sequence y[n], and the value of y[are, respectively
-
5, 2 -
6, 2 -
6, 1 -
5, 3
A discrete time linear shift-invariant system has an impulse response h[n] with h[=h[= -h[-and zero otherwise. The system is given an input sequence x[n] with x[- x[-and zero otherwise. The number of nonzero samples in the output sequence y[n], and the value of y[are, respectively
-
5, 2 -
6, 2 -
6, 1 -
5, 3
The truth table corresponding to the given input digital gate :
The truth table corresponding to the given input digital gate :