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Abstract

A high-speed digital distribution system is presented that includes a transmission line bus that carries modulated digital signals and reference signals. The transmission line bus has a first end electrically connected to a bus interface that modulates digital data onto said transmission line bus and demodulates modulated digital data signals that it receives from the transmission line bus. The bus interface can transmit and receive a reference signal. At least one digital component interface is in electromagnetic communication with the transmission line bus, and each digital component interface can also modulate digital data onto the transmission line bus and can demodulate modulated digital data signals received from the transmission line bus, and can transmit and receive a reference signal. The transmission line bus communicates modulated digital data in association with the reference signal between and among an external device connected to the bus interface and the at least one digital component interface. In one embodiment, the digital data is quadrature amplitude modulated with an encoding that uses one to five bits for the phase component and zero to three bits for the amplitude component. In another embodiment the transmission line bus has characteristic impedance and has matched terminations at its first and second ends.

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First Claim