Apparatus for compensating for resistance tolerances of a fuse for a circuit and line driver for a connection of a communication device

1. An apparatus for compensating for resistance tolerances of a tolerance-affected fuse of a circuit, the apparatus comprising:

a first resistor connected in series with the tolerance-affected fuse; and

a second resistor connected in parallel with the tolerance-affected fuse and with the first resistor;

wherein the apparatus has, at a predefined ambient temperature, a resistance which corresponds to a desired total resistance; and

wherein a resistance of the second resistor, comprising a resistance value at least ten times higher in relation to the first resistor, is selected depending on at least one of (i) a power input into the apparatus in a fault state and (ii) a predefined tolerance of the resistance of the apparatus.

2. The apparatus as claimed in claim 1 , wherein the tolerance-affected fuse has a tolerance, with respect to its resistance, of at least 5% at the predefined ambient temperature.

3. The apparatus as claimed in claim 2 , wherein the tolerance-affected fuse has a tolerance, with respect to its resistance, of at least 20% within a predefined temperature range.

4. The apparatus as claimed in claim 1 , wherein the tolerance-affected fuse has a tolerance, with respect to its resistance, of at least 20% within a predefined temperature range.

5. The apparatus as claimed in claim 4 , wherein the tolerance-affected fuse has a temperature coefficient of at least 0.4% per degree Kelvin within the predefined temperature range.

6. The apparatus as claimed in claim 5 , wherein at least one of the first resistor and the second resistor has a tolerance, with respect to a respective resistance of at most 0.1% within the predefined temperature range.

7. The apparatus as claimed in claim 5 , wherein the predefined temperature range comprises at least a range between −40° C. and 80° C.

8. The apparatus as claimed in claim 4 , wherein at least one of the first resistor and the second resistor has a tolerance, with respect to a respective resistance of at most 0.1% within the predefined temperature range.

9. The apparatus as claimed in claim 8 , wherein the predefined temperature range comprises at least a range between −40° C. and 80° C.

10. The apparatus as claimed in claim 4 , wherein the predefined temperature range comprises at least a range between −40° C. and 80° C.

11. The apparatus as claimed in claim 1 , wherein the predefined ambient temperature is 25° C.

12. The apparatus as claimed in claim 1 , wherein the resistance of the second resistor is predefined depending on a power input into the apparatus when the tolerance-affected fuse melts.

13. A line driver for a communication device comprising a physical layer (PHY) interface apparatus, the line driver comprising:

a bridge rectifier comprising two bus-side connections and two device-side connections;

a first high-pass filter arrangement which is connectable to a first transmission unit of the PHY interface apparatus of the communication device; and

a second high-pass filter arrangement which is connectable to a second transmission unit of the PHY interface apparatus of the communication device;

wherein the first high-pass filter arrangement and the second high-pass filter arrangement each comprise an apparatus as claimed in claim 1 .

14. The line driver as claimed in claim 13 , wherein the line driver is integrated into the communication device.