A communication system allows the transmission of voice, data, and non-compressed video signals over shielded or unshielded copper wire for extended distances. The system includes a transmitter, a wire link, and a receiver. The transmitter in the preferred embodiment amplifies substantially the entire...http://www.google.com.hk/patents/US6137524?utm_source=gb-gplus-share專利 US6137524 - Transmitter and receiver circuits for transmission of voice, data and video signals for extended distances
