1
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.
(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.
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