Contactless transmission of a differential signal between a transmitter and a receiver
AssigneeSiemens Aktiengesellschaft
InventorsMarkus Hemmerlein, Helmut Repp
Life of this patent
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Abstract
A method for the contactless transmission of at least one differential signal between a transmitter and a receiver given the existence of at least one common-mode noise signal, which has a low frequency in comparison with at least one signal to be transmitted, is provided. The suppression of at least one common-mode noise signal within the receiver a ground reference potential assigned to the receiver is separated into two ground reference potentials decoupled from one another. At least one common-mode noise signal may be suppressed by a filter unit at the input of a receive amplifier of the receiver.
Claims21
A method for the contactless transmission of at least one differential signal between a transmitter and a receiver given the existence of at least one common-mode noise signal, the method comprising:
- separating a ground reference potential assigned to the receiver into two ground reference potentials (14, 19, 29, 35, 38a, 38b) decoupled from one another, and
- suppressing the at least one common-mode noise signal by a filter unit at the input of a receive amplifier of the receiver,
- attenuating, using a passive filter unit, at least one common-mode noise signal in a coupler for decoupling at least one signal from the transmitter at the receiver at least essentially to the same extent as a signal of the same frequency to be transmitted and/or that a ground reference potential relating to a part of the receiver including a receive amplifier is capacitively coupled to a ground reference potential of the transmitter.
A circuit arrangement for the contactless transmission of at least one differential signal between a transmitter and a receiver of the circuit arrangement (1) given the existence of at least one common-mode noise signal that has a lower frequency than at least one signal to be transmitted, the circuit arrangement comprising:
- at least one circuit element which is designed for the separation of a ground reference potential assigned to the receiver into two ground reference potentials decoupled from one another, and/or
- a filter unit at the input of a receive amplifier of the receiver, which is designed for the suppression of at least one common-mode noise signal,
- a passive filter unit that attenuates at least one common-mode noise signal present in a coupler for decoupling at least one signal from the transmitter at the receiver at least essentially to the same extent as a signal of the same frequency to be transmitted, and/or at least one circuit element designed for the capacitive coupling of a ground reference potential relating to a part of the receiver including a receive amplifier to a ground reference potential of the transmitter.
Dependencies are inferred from the claim text.