Signal extender system and signal extender thereof

A system for transmitting electronic signals from an electronic signal source device to an electronic signal sink device, comprising:

• a transmitting module coupled to the signal source device for receiving a digital multimedia signal that includes multiple differential data signals, a differential clock signal and at least one first control signal, the transmitting module transforming the at least one first control signal into a first differential control signal;
• a repeater coupled between the transmitting module and a receiving module, and having an internal receiving module and an internal transmitting module coupled to each other;
• a first cable having four pairs of differential transmission lines and coupled between the transmitting module and the internal receiving module of the repeater;
• the receiving module coupled to the electronic signal sink device, the receiving module transforming at least one second control signal from the electronic signal sink device into a second differential control signal, and transmitting the second differential control signal over the fourth pair of differential transmission lines;
• the receiving module and the internal receiving module of the repeater each having a timing memory unit;
• a second cable having four pairs of differential transmission lines and coupled between the internal transmitting module of the repeater and the receiving module;
• and
• wherein the transmitting module and the internal transmitting module of the repeater transmit the multiple differential data signals over the first three pairs of differential transmission lines, and transmits the first differential control signal and a partial differential clock signal which is part of the differential clock signal over the fourth pair of differential transmission lines, and receives the second differential control signal from the fourth pair of differential transmission lines in a switching cycle;
• and
• wherein the timing memory unit receives the partial differential clock signal, and continuously replicates the partial differential clock signal to revert a complete differential clock signal.

A transmitting module for transmitting electronic signals from an electronic signal source device to an electronic signal sink device, comprising:

• a first interface, for receiving a digital multimedia signal including multiple differential data signals, a differential clock signal and at least one first control signal, wherein the multiple differential data signals and the differential clock signal each is characterized by consisting of two opposite signals;
• and
• a second interface including a plurality pairs of terminals;
• wherein the transmitting module transforms the at least one first control signal into a first differential control signal, transmits the first differential control signal and a partial differential clock signal which is part of the differential clock signal to a first pair of the terminals in a switching cycle so that the first differential control signal and the partial differential clock signal are transmitted alternatively in a sequence which is repeated periodically, and transmits the multiple differential data signals to the other pairs of the terminals.

A receiving module for receiving electronic signals from an electronic signal source device and transmitting to an electronic signal sink device, comprising:

• a first interface including a plurality pairs of terminals, the first interface receiving a first differential control signal and a partial differential clock signal which is part of a differential clock signal from a first pair of the terminals, and receiving multiple differential data signals from the other pairs of the terminals;
• a second interface for outputting a digital multimedia signal including the multiple differential data signals, the differential clock signal and at least one first control signal;
• and
• a timing memory unit, for receiving the partial differential clock signal, and continuously replicates the partial differential clock signal to revert the differential clock signal;
• wherein the receiving module receives the first differential control signal and the partial differential clock signal from the first pair of the terminals in a switching cycle, and transforms the first differential control signal into the at least one first control signal.