US 12,405,911 B2
Transfer device for a differential bus system
Sebastian Stegemann, Tuebingen (DE); and Steffen Walker, Reutlingen (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 18/250,747
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Oct. 6, 2021, PCT No. PCT/EP2021/077548
§ 371(c)(1), (2) Date May 18, 2023,
PCT Pub. No. WO2022/089900, PCT Pub. Date May 5, 2022.
Claims priority of application No. 10 2020 213 482.0 (DE), filed on Oct. 27, 2020.
Prior Publication US 2023/0401167 A1, Dec. 14, 2023
Int. Cl. G06F 13/40 (2006.01)
CPC G06F 13/4004 (2013.01) 14 Claims
OG exemplary drawing
 
1. A transfer device for a differential bus system, comprising:
a first bus connection and a second bus connection for connection to a transfer medium of the differential bus system;
a transmitting device that is connected and/or connectable to the first bus connection and the second bus connection; and
an impedance adaptation circuit that is configured to control an impedance at the first bus connection and/or an impedance at the second bus connection, wherein the control is based on a predefined or predefinable impedance difference value of a difference between the respective impedances at the first and second bus connections.
 
6. A method for operating a transfer device for a differential bus system, the transfer device including a first bus connection and a second bus connection for connection to a transfer medium of the differential bus system, and including a transmitting device that is connected and/or connectable to the first bus connection and the second bus connection, the transfer device including an impedance adaptation circuit, the method comprising the following:
controlling an impedance at the first bus connection and/or an impedance at the second bus connection, wherein the control is based on a predefined or predefinable impedance difference value of a difference between the respective impedances at the first and second bus connections.
 
8. A transfer device for a differential bus system, comprising:
a first bus connection and a second bus connection for connection to a transfer medium of the differential bus system;
a transmitting device that is connected and/or connectable to the first bus connection and the second bus connection; and
an impedance adaptation circuit that is configured to influence an impedance at the first bus connection and/or at the second bus connection;
wherein the transfer device includes at least one of the following three features (I)-(III):
(I) the influence of the impedance for which the impedance adaptation circuit is configured is an influence of the impedance at the first bus connection and/or the second bus connection that ensures that the impedance at the first bus connection does not deviate from the impedance at the second bus connection by more than a maximum predefinable difference value;
(II) the impedance adaptation circuit includes a first active semiconductor element that is connected and/or connectable to the first bus connection and a second active semiconductor element that is connected and/or connectable to the second bus connection; and
(III) the impedance adaptation circuit includes at least one circuit component that represents a simulation of at least one portion of the transmitting device.