Patent ID: 6360081
Filing Date: 2002-03-19
Classification: H04L

Abstract:
A bidirectional signal transmission system, comprising a first transceiver, a second transceiver, and a transmission line connecting the first transceiver and the second transceiver with each other, in which the first transceiver transmits a first signal to the second transceiver while the second transceiver simultaneously transmits a second signal to the first transceiver, wherein:the first transceiver comprises: a first constant current circuit out of which a current flows, the current having a level which changes according to a first logical level of the first signal; and a first current difference compensation circuit for compensating for a difference between the current flowing out of the first constant current circuit and a current flowing along the transmission line in a direction from the first transceiver to the second transceiver; and the second transceiver comprises: a second constant current circuit into which a current flows, the current having a level which changes according to a second logical level of the second signal; and a second current difference compensation circuit for compensating for a difference between the current flowing into the second constant current circuit and the current flowing along the transmission line in a direction from the first transceiver to the second transceiver, wherein the current flow along the transmission line is in a constant direction from the first transceiver to the second transceiver, independent of the first logical level of the first signal, and the second logical level of the second signal.