Question

an integrated circuit voltage of 0.9 volts decreases by 0.2 volts per second how long does it take to reach a voltage of 0.3 volts

Answer 1

V(t) = 0.9 - 0.2t = 0.3, t=?

-0.2t = 0.3-0.9
0.2t = 0.6
t = 5*0.6 = 3 seconds