Forschungszentrum Julich Gmbh

Christian Grewing

Christian Roth

-Ing Markus Robens

Lioubov Jokhovets

Markus Robens

Alessandra Lai

Andreas Erven

Pawel Kulessa

Stefen Van Waasen

The invention relates to a method and a system for position determination of at least one object, in particular inside a building. In a method for position determination of at least one object, at least four transmitters transmit circularly polarized signals and a receiver to be localized receives the circularly polarized signals. At least two and in particular all transmitters transmit periodic signals of different frequencies, these frequencies being closely adjacent.

Method and system for determining the position of at least one object

The invention relates to a filter circuit which, on the hardware level, prevents charge transfers caused by one or more currents in a frequency divider () from generating an interference signal that can cause a signal distortion at the output of a current-to-voltage converter () belonging to a filter circuit. This signal distortion would otherwise have to be removed by means of laborious post-processing of the signal. In this process, the voltage curve at the input of the frequency divider () or the current at the second output of the frequency divider () are employed so that, by means of a compensation circuit arrangement, it is possible to model a compensation signal that essentially compensates for an interference signal caused by the charge transfers. The invention also relates to an associated method.

Filter circuit for suppressing signal distortion

The invention relates to a voltage amplifier () that places defined ranges () of an input voltage signal () in different relations in terms of the input voltage signal () at one or more operating points of an amplifier circuit (). An appropriate division of the ranges () of the input voltage signal () makes it possible to linearly amplify the appertaining ranges (). Such linearly amplified output signals () can then be converted into digital signals (), for example, by means of several analog-to-digital converters ().

Voltage amplifier for a programmable voltage range

The invention relates to a filter circuit () comprising at least a first filter line (). The first filter line () has a first input circuit (), a first integration circuit () and a first output circuit (). The first input circuit () is configured in such a way that, as a function of the value of the input signal, it converts an input signal into at least two distinguishable, first first-stage output signals and relays the first-stage output signals to the first integration circuit () during a prescribed period of time. The first integration circuit () is configured to integrate the first first-stage output signals of the first input circuit () over the prescribed period of time and to generate a first integration signal (). The first output circuit () is configured to compare the first integration signal () to a first output reference value and to generate a first second-stage output signal (). The invention also relates to an appertaining filtering method.

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Jülich, Germany

Christian Grewing