System for transmission of data on a bus

• US 20050135331A1
• Filed: 12/17/2004
• Published: 06/23/2005
• Est. Priority Date: 12/17/2003
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Reindl, Hartwig, Schmid, Gerhard
• Granted Patent: US 7,356,050 B2
• Time in Patent Office: Days
• US Class Current: 370/351
• CPC Class Codes: H04L 12/40032 Details regarding a bus interface enhancer
• CPC Class Codes: H04L 2012/40215 Controller Area Network CAN
• CPC Class Codes: H04L 2012/40273 the transportation system being a vehicle

Abstract

A system for transmitting data between a transmitter and a receiver on a communication network connecting a number of components, especially in a motor vehicle, has a CAN transceiver which converts logic signals into bus data signals downstream of each transmitter. A non-inductive symmetrical CAN filter is connected downstream of each CAN bus transceiver. The CAN filter has at least two impedances and it is preferably implemented as an X2Y capacitor.

Claims

1. A system for transmitting data between a transmitter and a receiver on a communication network connecting a plurality of components, comprising:

at least one transmitter for transmitting data on the communication network;

a CAN bus transceiver connected following said at least one transmitter in a signal flow direction and configured to convert logic signals into bus data signals; and

a symmetrical CAN filter connected following said CAN bus transceiver in the signal flow direction, said CAN filter having a non-inductive configuration and including at least two impedances.

2. The system according to claim 1, wherein said CAN bus transceiver and said CAN filter are disposed in a motor vehicle and are connected in a CAN bus of the motor vehicle.

3. The system according to claim 1, wherein said at least two impedances include a first impedance shorting a CAN-H line to ground and a second impedance shorting a CAN-L line to ground.

4. The system according to claim 3, wherein said first and second impedances are structured identically with regard to an electronic characteristic thereof.

5. The system according to claim 3, which comprises a third impedance connecting the CAN_H line and the CAN_L line.

6. The system according to claim 5, wherein said first, second, and third impedances are capacitive components.

7. The system according to claim 3, wherein said first and second impedances are capacitive components.

8. The system according to claim 1, wherein said symmetrical CAN filter is an X2Y capacitor.