Mathematics

Problem

A signal

s(t)

is a periodic triangular wave oscillating between

-1

and

1

. A DC offset voltage

V

is added to create a new signal

S(t) = s(t) + V

. If the root-mean-square (RMS) value is not required, but we know the new signal never drops below

2\,\text{V}

, find the minimum possible value of

V