Patent ID: 6417581
Filing Date: 2002-07-09
Classification: H01T,H05F

Abstract:
A circuit for changing the relative position of wired electrical lines which are in a fixed relationship to each other, the wired electrical lines including a first communication line with a first voltage and a second communication line with a second voltage, the circuit comprising:(a) a first switch associated with the first communication line, the first switch having a first, initial position and a second position which is opposite of the first, initial position; (b) a second switch associated with the second communication line, the second switch having a first, initial position and a second position which is opposite of the first, initial position; and (c) a processor having an output control signal connected to the first and second switches for causing the first and second switches to be placed in their respective first or second position, wherein the first and second communication lines have a first configuration when both are in their first, initial position and a second configuration when both are in their second position, the processor generating an initial control signal to set the first and second switches in their first position and including means for determining if the first and second communication lines are in an expected state and remain in the expected state for a predetermined period of time, the processor maintaining the first and second switches in the first position if the first and second communication lines are initially in the expected state and remain in the expected state for the predetermined period of time, the processor generating a second control signal to set the first and second switches in their second position if the first and second communication lines are not in the expected state for the predetermined period of time, the expected state being defined as one of the first voltage and the second voltage being generally less than the other voltage by a minimum predetermined difference voltage.