1
GATE ECE 1997
Subjective
+5
-0
In the cascade amplifier circuit shown below, determine the values of R1, R2 and RL. Such that the quiescent current through the transistors is 1mA and the collector voltage Vc1 = 3V, and Vc2 = 6V. Tke VBE = 0.7V, Transistor $$\beta $$ to be hifgh and base currents to be negligible.
![GATE ECE 1997 Analog Circuits - Bipolar Junction Transistor Question 7 English](https://gateclass.cdn.examgoal.net/examside/questions/ebb3bd8623f234243d2d6094e961b9f1cf65c21ada9f1c8ecb682c1b9df2df69.jpg)
2
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 85 English 1](https://gateclass.cdn.examgoal.net/examside/questions/2734138e672865bad8e841c1b7f3075938760cf518d95d186bb20e565d0b6c4a.jpg)
![GATE ECE 1997 Analog Circuits - Operational Amplifier Question 85 English 2](https://gateclass.cdn.examgoal.net/examside/questions/ddd4228b5761e08e6f1b3d3c1ba7cf36ea102ace7a3eeffdf495a94b90fccffa.jpg)
3
GATE ECE 1997
Subjective
+2
-0
Negative feedback in
1. Voltage series configuration
2.Current shunt configuration
(a) increases input impedance
(b) decreases input impedance
(c) increases closed loop gain
(d) leads to ascillation.
4
GATE ECE 1997
Subjective
+5
-0
An IC 555 chip has been used to construct a pulse generator. Typical pin connections with components is shown below in fig. for such application. However it is desired to generate a square pulse of 10KHz..
Evaluate values of $${R_{A\,}}$$ and $${R_{B\,}}$$ and if the capacitor has the value of 0.01$$\mu $$F for the configuration closed. If necessary you can suggest modifications in the external circuit configuration.
![GATE ECE 1997 Analog Circuits - 555 Timer Question 2 English](https://gateclass.cdn.examgoal.net/examside/questions/dfc622699900eeb59f9e696dddddfc5baabbf018b65f8b02172ef6063c8c55a4.jpg)
Paper analysis
Total Questions
Analog Circuits
7
Communications
3
Control Systems
4
Digital Circuits
9
Electromagnetics
6
Electronic Devices and VLSI
1
Engineering Mathematics
2
Microprocessors
3
Network Theory
10
Signals and Systems
7
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