1
GATE EE 1991
Subjective
+2
-0
With the ideal operational amplifiers, the circuit in figure simulates the equation GATE EE 1991 Analog Electronics - Operational Amplifier Question 44 English
2
GATE EE 1991
Subjective
+5
-0
In the figure shown, assume that the zener diode and operational amplifier to be ideal.

$$(a)$$ Draw the equivalent circuit and evaluate the gain $$\left( {{V_0}\,\,vs\,\,{V_i}} \right)$$ of the circuit for

GATE EE 1991 Analog Electronics - Operational Amplifier Question 10 English

$$(i)$$ $${V_i} \le 0$$ $$\,\,\,\,\,\left( {ii} \right)\,\,\,0 < {V_i} < 5V\,\,\,\,\,\,$$ $$\,\,\,\,\,\left( {iii} \right)\,\,\,{V_i} > 5V\,\,\,\,\,\,$$

$$(b)$$ Sketch the gain $$\left( {{V_0}\,\,\,{V_s}\,\,\,{V_i}} \right)$$ characteristics of the above circuit and label the salient features.

3
GATE EE 1991
Subjective
+5
-0
Figure shows a common emitter amplifier GATE EE 1991 Analog Electronics - Small Signal Modeling Question 3 English 1 GATE EE 1991 Analog Electronics - Small Signal Modeling Question 3 English 2

$$(a)$$ Simplify the circuit by applying thevenin's theorem to biasing network $${R_1},{R_2}$$ at
$$\,\,\,\,\,\,\,$$ the base of the transistor.
$$(b)$$ Assuming $${C_s}$$ to be a short for frequency range considered. Draw the small signal
$$\,\,\,\,\,\,\,$$ $$a.c.$$ model of the circuit obtained in $$(a)$$ by using the simple model for the
$$\,\,\,\,\,\,\,$$ transistor shown in figure.
$$(c)$$ Evaluate the small signal gain $$\left( {{{{V_0}} \over {{V_i}}}} \right)$$ of the amplifier.

4
GATE EE 1991
Fill in the Blanks
+2
-0
The signal flow graph of Fig. shown below, has ___________ forward paths / and ________feed - back loops. GATE EE 1991 Control Systems - Block Diagram and Signal Flow Graph Question 11 English
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
CBSE
Class 12