A jet aircraft employs a system for monitoring the rpm, pressure, and temper¬
ature values of its engines using sensors that operate as follows:
RPM sensor output = 0 only when speed < 4800 rpm
P sensor output = 0 only when pressure < 220 psi
T sensor output = 0 only when temperature < 200°F
Figure 3-46 shows the logic circuit that controls a cockpit warning light for
certain combinations of engine conditions. Assume that a HIGH at output W
activates the warning light.
(a) Determine what engine conditions will give a warning to the pilot.
(b) Change this circuit to one using all NAND gates.