Range extension for combined data and power line

1. An apparatus for range extension for a combined data and power line, comprising:

a first port for connecting a first combined data and power line, wherein the first port has a first and a second electrical contact,

a first charge pump for refreshing a DC voltage, wherein the first charge pump is connected via a first inductive assembly to the first and the second contact of the first port, so that the first charge pump can refresh a first DC supply voltage applied to the first and to the second contact of the first port,

a second port for connecting a second combined data and power line, wherein the second port has a first and a second electrical contact,

wherein the first charge pump is connected via a second inductive assembly to the first and the second contact of the second port in order to apply the refreshed first DC supply voltage to the first and to the second contact of the second port,

a first physical interface for receiving a first differential data signal, wherein the first physical interface is connected via a first transformer and a first capacitive assembly to the first and the second contact of the first port in order to receive a first differential data signal applied to the first contact and the second contact of the first port, and

a second physical interface connected to the first physical interface for providing the first differential data signal,

wherein the second physical interface is connected via a second transformer and a second capacitive assembly to the first and the second contact of the second port in order to apply the first differential data signal to the first contact and to the second contact of the second port.

2. The apparatus according to claim 1 , wherein the first physical interface and the second physical interface are connected by a processing unit for processing the first differential data signal.

3. The apparatus according to claim 2 , wherein a voltmeter for measuring a voltage applied to the first and to the second contact of the first port is provided, and wherein the processing unit is configured to insert a first voltage value corresponding to the measured voltage into the first differential data signal.

4. The apparatus according to claim 2 , wherein an ammeter for measuring an electric current corresponding to a voltage applied to the first and to the second contact of the first port is provided, and wherein the processing unit is configured to insert a first current value corresponding to the measured electric current into the first differential data signal.

5. The apparatus according to claim 2 , wherein a thermometer for measuring a temperature of one of the electronic elements of the apparatus is provided, and wherein the processing unit is configured to insert a temperature value corresponding to the measured temperature into the first differential data signal.

6. The apparatus according to claim 2 , wherein the processing unit is configured to refresh the first differential data signal.

7. The apparatus according to claim 1 , wherein refreshing of the first DC supply voltage by the first charge pump is configured to be able to be switched on and off.

8. The apparatus according to claim 1 , wherein refreshing of the first DC supply voltage by the first charge pump is configured to be able to be switched on and off, and wherein a processing unit is configured to control the switching-on and switching-off.

9. The apparatus according to claim 1 , wherein a power supply unit for supplying the first charge pump with electric power is provided.

10. The apparatus according to claim 1 , wherein the first charge pump is configured to refresh the first DC supply voltage only when the first DC supply voltage is lower than or lower than/the same as a predetermined first supply voltage threshold value.

11. The apparatus according to claim 1 ,

wherein the first port has a third and a fourth contact,

wherein a second charge pump is connected via a third inductive assembly to the third and the fourth contact of the first port, so that the second charge pump can refresh a second DC supply voltage applied to the third and to the fourth contact of the first port,

wherein the second port has a third and a fourth electrical contact,

wherein the second charge pump is connected via a fourth inductive assembly to the third and the fourth contact of the second port in order to apply the refreshed second DC supply voltage to the third and to the fourth contact of the second port,

wherein the first physical interface is connected via a third transformer and a third capacitive assembly to the third and the fourth contact of the first port in order to receive a second differential data signal applied to the third contact and the fourth contact of the first port, and

wherein the second physical interface is connected via a fourth transformer and a fourth capacitive assembly to the third and the fourth contact of the second port in order to apply the second differential data signal to the third contact and to the fourth contact of the second port.

12. A method for range extension for a combined data and power line, comprising the following steps:

applying a first DC supply voltage to a first and to a second contact of a first port for connecting a first combined data and power line,

refreshing the first DC supply voltage applied to the first and to the second contact of the first port,

applying the refreshed first DC supply voltage to a first and to a second contact of a second port for connecting a second combined data and power line,

receiving a first differential data signal applied to the first contact and the second contact of the first port, and

applying the first differential data signal to the first contact and to the second contact of the second port.

13. The method according to claim 12 ,

wherein a first charge pump refreshes the DC voltage,

wherein the first charge pump is connected via a first inductive assembly to the first and the second contact of the first port, so that the first charge pump can refresh a first DC supply voltage applied to the first and to the second contact of the first port, and

wherein the first charge pump is connected via a second inductive assembly to the first and the second contact of the second port in order to apply the refreshed first DC supply voltage to the first and to the second contact of the second port.

14. The method according to claim 12 ,

wherein a first physical interface receives the first differential data signal,

wherein the first physical interface is connected via a first transformer and a first capacitive assembly to the first and the second contact of the first port in order to receive a first differential data signal applied to the first contact and the second contact of the first port, and

wherein a second physical interface is connected via a second transformer and a second capacitive assembly to the first and the second contact of the second port in order to apply the first differential data signal to the first contact and to the second contact of the second port.

15. The method according to claim 12 , wherein a voltmeter measures a voltage applied to the first and to the second contact of the first port, and wherein a processing unit inserts a first voltage value corresponding to the measured voltage into the first differential data signal.

16. The method according to claim 12 , wherein an ammeter measures an electric current corresponding to a voltage applied to the first and to the second contact of the first port, and wherein a processing unit inserts a first current value corresponding to the measured electric current into the first differential data signal.

17. The method according to claim 12 , wherein a thermometer that measures a temperature of one of the electronic elements of the apparatus is provided, and a processing unit inserts a temperature value corresponding to the measured temperature into the first differential data signal.

18. The method according to claim 12 , wherein a processing unit refreshes the first differential data signal.

19. The method according to claim 12 , wherein the first DC supply voltage is refreshed only when the first DC supply voltage is lower than or lower than/the same as a predetermined first supply voltage threshold value.

20. A bus system, comprising: a supply module for supplying a first DC supply voltage and a first differential data signal to a first combined data and power line, an apparatus for connect the first combined data and power line to a second combined data and power line, and a load module for receiving the first DC supply voltage and the first differential data signal from the second combined data and power line, wherein the apparatus comprising: a first charge pump for refreshing the DC voltage, a first port for connecting the first combined data and power line, wherein the first port has a first and a second electrical contact, wherein the first charge pump is connected via a first inductive assembly to the first and the second contact of the first port, so that the first charge pump can refresh a first DC supply voltage applied to the first and to the second contact of the first port, a second port for connecting the second combined data and power line, wherein the second port has a first and a second electrical contact, wherein the first charge pump is connected via a second inductive assembly to the first and the second contact of the second port in order to apply the refreshed first DC supply voltage to the first and to the second contact of the second port, a first physical interface for receiving the first differential data signal, wherein the first physical interface is connected via a first transformer and a first capacitive assembly to the first and the second contact of the first port in order to receive a first differential data signal applied to the first contact and the second contact of the first port, and a second physical interface connected to the first physical interface for providing the first differential data signal, wherein the second physical interface is connected via a second transformer and a second capacitive assembly to the first and the second contact of the second port in order to apply the first differential data signal to the first contact and to the second contact of the second port.

21. The bus system according to claim 20 , wherein the first physical interface and the second physical interface are connected by a processing unit for refreshing the first differential data signal.

22. The bus system according to claim 20 , wherein refreshing of the first DC supply voltage by the first charge pump is configured to be able to be switched on and off.

23. The bus system according to claim 20 , wherein refreshing of the first DC supply voltage by the first charge pump is configured to be able to be switched on and off, wherein a processing unit is configured to control the switching-on and switching-off.

24. The bus system according to claim 20 , wherein a power supply unit for supplying the first charge pump with electric power is provided.

25. The bus system according to claim 20 , wherein the first charge pump is configured to refresh the first DC supply voltage only when the first DC supply voltage is lower than or lower than/the same as a predetermined first supply voltage threshold value.