Device for non-contacting transmission of electrical signals between two relatively moving parts, with reduced perturbing radiation

US7421058B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Stefan Popescu · Erlangen, DE
• Marco Leone · Olching, DE

Key dates

• Filing date: Jul 28, 2006
• Grant date: Sep 2, 2008
• Expiry date: Aug 30, 2026

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L25/085
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A device for non-contacting transmission of electrical signals between one part moving relative to another part has at least one strip conductor pair for symmetrical signal transmission attached on a first of the two parts, in which strip conductor pair the electrical signals are supplied from a transmission module for differential signal transmission. At least one reception element is attached on the other of the two parts, at a slight separation along at least one segment of the strip conductor pair, and is connected with a reception module. The strip conductor pair is provided with one or more components for reduction of a common mode signal component that arises therein due to the differential signals therein. Additionally or alternatively, compensation elements for adaptation of a time offset between signals on the output conductors are arranged in the output conductors of the transmission module that minimizes the common mode signal component. A reduced electromagnetic perturbing radiation is achieved with the device during the non-contacting signal transmission by capacitive RF coupling.