Circuit arrangement for the frequency analysis of a signal
AssigneeSiemens Aktiengesellschaft
InventorKurt Berglund
Life of this patent
Estimating the term…
Abstract
A circuit arrangement for the frequency analysis of a signal, including a plurality of band filter channels, to whose inputs there is transmitted in parallel the signal which is to be analyzed, and which possess band filters having different limiting or boundary frequencies and containing rectifiers and integrators for the integration of the rectified output signals of the band filters at predetermined integrating intervals; and having a scanning arrangement connected to the outputs thereof which interrogates the integration results pursuant to predetermined intervals.
Claims8
In a circuit arrangement for the frequency analysis of a signal, including a plurality of band filter channels having inputs to which the signal is transmitted in parallel connection, said channels including band filters of different boundary frequencies, rectifiers and integrators for integrating the rectified output signals of the band filters within predetermined integrating intervals;
- and a scanning installation being connected to the outputs of the latter for retrieving the integrating results after predetermined intervals, the improvement comprising:
- means comprising switch elements for determining the integrating intervals in dependence upon the median transmissive frequencies of said band filters so that the integrating intervals decrease with an increasing median transmissive frequency of said band filters;
- and switch elements having correlating means connected to the outputs of said integrators for correlating each integrating result to the corresponding integrating interval.
In a circuit arrangement for the frequency analysis of a signal, including a plurality of band filter channels having inputs to which the signal is transmitted in parallel connection, said channels having band filters of different boundary frequencies, rectifiers and integrators for integrating the rectified output signals of the band filters within predetermined integrating intervals;
- and a scanning installation being connected to the outputs of the latter for retrieving the integrating results after predetermined intervals, means comprising switch elements for determining the integrating intervals in dependence upon the median transmissive frequencies of said band filters so that the integrating intervals decrease with an increasing median transmissive frequency of said band filters;
- said switch elements having voltage dividers connected to the outputs of said integrators for correlating the integrating results to the integrating intervals and whose dividing ratios correspond to the integrating intervals.
In a circuit arrangement for the frequency analysis of a signal, including a plurality of band filter channels having inputs to which the signal is transmitted in parallel connection, said channels including band filters of different boundary frequencies, rectifiers and integrators for integrating the rectified output signals of the band filters within predetermined integrating intervals;
- and a scanning installation being connected to the outputs of the latter for retrieving the integrating results after predetermined intervals;
- means comprising switch elements for determining the integrating intervals in dependence upon the median transmissive frequencies of said band filters so that the integrating intervals decrease with an increasing median transmissive frequency of said band filters;
- and said switch elements having correlating means connected to the outputs of said integrators for correlating each integrating result to the corresponding integrating interval;
- signal storage means connected to the outputs of said band filter channels, said signal storage means being connected to the integrators via the switch elements;
- and impulse generators delivering impulse sequences in which the duration of the impulses is equal to the current integrating interval.
Dependencies are inferred from the claim text.