Coupling circuit for feeding or intercepting DC voltage component on electrical line of data transmission cable, measuring device for checking data transmission, and signal processing unit and system

• Main Author: KAINDL MICHAEL
• Format: Patent
• Language: Chinese; English
• Published: 09.01.2024
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

The invention relates to a coupling circuit (24) for feeding in or cutting off a DC voltage component on an electrical line (18) of a data transmission cable (14), in which a common mode choke (29) is provided, in which a first input port (30) is coupled to a first output port (32) via a first inductance (31) and a second input port (33) is coupled to a second output port (35) via a second inductance (34), the second inductor is magnetically coupled with the first inductor (31) for common mode rejection; the first input port (30) is electrically connected to the first capacitor port (26) and the second input port (33) is electrically connected to the second capacitor port (27) and the first output port (32) is galvanically connected to the DC voltage supply port (37) and the second output port (35) is connected to the DC voltage supply port (37) or to a measurement input (58) of the voltage measurement circuit (51) via the capacitor (38). 本发明涉及一种用于在数据传输线缆(14)的电导线(18)上馈入或截取直流电压分量的耦合电路(24)，其中，提供共模扼流器(29)，其中第一输入