1
GATE ECE 1989
Subjective
+10
-0
Nyquist plot consider a feed back system where the OLTF is: $$G(s) = {1 \over {s\left( {2s + 1} \right)\left( {s + 1} \right)}}.$$ Determine the asymptote which the nyquist plot approaches as $$\omega \to 0.$$ Find also the range of 'k' in terms of the cross over frequency $${\omega _{PC}}$$ for stability.
2
GATE ECE 1989
MCQ (Single Correct Answer)
+2
-0.6
From the Nicholas chart, one can determine the following quantities pertaining to a closed loop system:
A
Magnitude and phase
B
band width
C
only magnitude
D
only phase
3
GATE ECE 1989
MCQ (Single Correct Answer)
+2
-0.6
In order to stabilize the system shown in fig. Ti should satisfy: GATE ECE 1989 Control Systems - Stability Question 18 English
A
$${\mathrm T}_\mathrm i=-\mathrm T$$
B
$${\mathrm T}_\mathrm i=\mathrm T.$$
C
$${\mathrm T}_\mathrm i<\mathrm T.$$
D
$${\mathrm T}_\mathrm i>\mathrm T.$$
4
GATE ECE 1989
Subjective
+10
-0
A chemical reactor has three sensors indicating the following conditions:-
(1) Pressure (P) is low or high'
(2) Temperature (T) is low or high' and
(3) Liquid level (L) is low or high.

its has two controls - Heater (H) which is either on or off and inlet value (V) which is open or close. The controls are operated as per Table.

(a) Using the convertion High =1, Low = 0, On=1, Off=0, Open=1 and Closed=0, draw the Karnaugh maps for H and V.

(b) Obtain the minimal product of sums expressions for H and V.

(c) Realize the logic for H and V using two 4-input multiplexers with T and L as control inputs. Used T as MSB. GATE ECE 1989 Digital Circuits - Combinational Circuits Question 8 English

EXAM MAP