US 11,810,745 B2
Apparatus for compensating for resistance tolerances of a fuse for a circuit and line driver for a connection of a communication device
Michael Geppert, Ottersweier (DE); Reinhard Bachmann, Lingenfeld (DE); Jens Gottron, Karlsruhe (DE); and Arnold Klamm, Kandel (DE)
Assigned to SIEMENS AKTIENGESELLSCHAFT, Munich (DE)
Filed by Siemens Aktiengesellschaft, Munich (DE)
Filed on Mar. 30, 2022, as Appl. No. 17/708,092.
Claims priority of application No. 21166260 (EP), filed on Mar. 31, 2021.
Prior Publication US 2022/0319791 A1, Oct. 6, 2022
Int. Cl. H01H 85/055 (2006.01); H01H 85/02 (2006.01); H04B 1/04 (2006.01)
CPC H01H 85/0241 (2013.01) [H01H 85/055 (2013.01); H04B 1/04 (2013.01)] 14 Claims
OG exemplary drawing
 
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.