Contactless transmission of a differential signal between a transmitter and a receiver
AssigneeSiemens Aktiengesellschaft
InventorsMarkus Hemmerlein, Helmut Repp
Life of this patent
Estimating the term…
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 a 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 decoupled from one another, and
- suppressing the at least one common-mode noise signal by a filter unit at an input of a receive amplifier of the receiver,
- attenuating, using a passive-filter unit, the 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
- capacitively coupling a ground reference potential relating to a part of the receiver including the receive amplifier to a ground reference potential of the transmitter,
- wherein separating the ground reference potential includes modulating an analog signal, encoding a digital signal or modulating the analog signal and encoding the digital signal, and
- wherein an optoelectrical converter and an optical waveguide are used to separate the ground reference potential.
A circuit arrangement for the contactless transmission of at least one differential signal between a transmitter and a receiver of the circuit arrangement 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 configured 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 an input of a receive amplifier of the receiver, the filter unit being designed for the suppression of the at least one common-mode noise signal,
- a passive filter unit that attenuates the at least one common-mode noise signal, which is 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 configured for the capacitive coupling of a ground reference potential relating to a part of the receiver including the receive amplifier to a ground reference potential of the transmitter, and
- at least one optocoupler, transducer, or optoelectrical converter in conjunction with an optical waveguide, configured for the separation of at least one signal.
A method for contactless transmission of a differential signal between a transmitter and a receiver given the existence of a common-mode noise signal, the method comprising:
- separating a ground reference potential associated with the receiver into two ground reference potentials decoupled from each other to suppress the common-mode noise signal within the receiver;
- and
- capacitively coupling a ground reference potential relating to a part of the receiver including a receiver amplifier, to a ground reference potential of the transmitter.
Dependencies are inferred from the claim text.