US 12,074,578 B2
Method and device for attenuating oscillations on bus lines of a bus system based on differential voltage signals
Sebastian Stegemann, Tuebingen (DE); and Steffen Walker, Reutlingen (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 17/999,574
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Apr. 21, 2021, PCT No. PCT/EP2021/060377
§ 371(c)(1), (2) Date Nov. 22, 2022,
PCT Pub. No. WO2021/233635, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 10 2020 206 411.3 (DE), filed on May 22, 2020.
Prior Publication US 2023/0223931 A1, Jul. 13, 2023
Int. Cl. H03H 11/24 (2006.01); H04L 25/02 (2006.01)
CPC H03H 11/245 (2013.01) [H04L 25/0272 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An attenuation device for a controller area network bus of a bus system based on differential voltage signals, the bus including a first bus line and a second bus line, comprising:
an attenuating circuit that provides a variable electrical resistance value between the first bus line and the second bus line and that is operable in at least three circuit states, wherein in a first circuit state, the first bus line and the second bus line are connected by an attenuation resistor having a first resistance value, in a second circuit state the first bus line and the second bus line are connected by the attenuation resistor having a second resistance value, and in a third circuit state the first bus line and the second bus line are connected by the attenuation resistor having a third resistance value;
wherein the first resistance value is less than the second resistance value, and the second resistance value is less than the third resistance value, and
wherein the second resistance value is a time-variable resistance value.