Current State With current state techniques, the current value (the current state) of the signal
is used to distinguish between 0s and 1s. The use of the word current in this context does not
refer to current as in voltage but rather to current as in the present time. Current state techniques will designate a specific or current value to indicate a binary 0 and another value to
indicate a binary 1. At a specific point in time, it is the value of the signal that determines the
binary value. For example, you can represent 0s and 1s using an ordinary door. Once a minute
you can check to see if the door is open or closed. If the door is open it represents a 0, and if
the door is closed it represents a 1. The current state of the door, open or closed, is what determines 0s or 1s.