The system preferably includes a unique transmitter that sends both clock and data signals over the same transmission line. The receiver uses the same transmission line to send data signals back to the transmitter. The transmitter comprises a clock generator, a decoder and a line interface. The clock...http://www.google.de/patents/US6463092?utm_source=gb-gplus-sharePatent US6463092 - System and method for sending and receiving data signals over a clock signal line
