1
GATE EE 1994
True or False
+1
-0
A practical $$R$$-$$C$$ sinusoidal oscillator is built using a positive feedback amplifier with a closed loop gain slightly less than unity.
A
TRUE
B
FALSE
2
GATE EE 1994
Subjective
+1
-0
Given figure shows a two stage small signal transistor feedback amplifier. Match the defective component (listed on the left hand side below) with its probable effect on the circuit (listed below) GATE EE 1994 Analog Electronics - Feedback Amplifiers and Oscillator Circuits Question 1 English

List - $${\rm I}$$
$$A.$$ Capacitor $${C_1}$$ is open
$$B.$$ Capacitor $${C_3}$$ is open
$$C.$$ Capacitor $${C_4}$$ is open
$$D.$$ $$R{C_2}$$ is shorted

List - $${\rm II}$$
$$P.$$ All $$dc$$ voltages normal, $${V_0}$$ increases marginally
$$Q.$$ Collector of $$T{R_2}$$ at $${V_{cc}},\,\,{V_0} = 0$$
$$R.$$ All $$dc$$ voltages normal, gain of $${2^{nd}}$$ stage decreases, $${V_0}$$ decreases.
$$S.$$ All $$dc$$ voltage normal, $${V_0} = 0$$
$$T.$$ All $$dc$$ voltages normal, overall gain of the amplifier increases, $${V_0}$$ increase
$$U.$$ No change

3
GATE EE 1994
Numerical
+1
-0
The number of positive real roots of the equation $${s^3} - 2s + 2 = 0$$ is __________.
Your input ____
4
GATE EE 1994
True or False
+1
-0
The closed loop system , of Figure, is stable if the transfer function $$T\left( s \right) = {{C\left( s \right)} \over {R\left( s \right)}}$$ is stable. GATE EE 1994 Control Systems - Routh Hurwitz Stability Question 2 English
A
TRUE
B
FALSE
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