US 6,606,013 B2Granted

Equalizing device for cable distribution network

AssigneeKoninklijke Philips Electronics N.V.

InventorsAlain Bachelay, Pascal Rouet, Vincent Magnin

Life of this patent

Estimating the term…

Loading patent…

Abstract

The invention relates to an equalizing device (62) intended to be used in a signal processing device (30) of a cable distribution network (1). The equalizing device according to the invention comprises two branches (B1, B2) brought together at the input (IN) and output (OUT) via two diplexers (SS, RC). At least either of the two branches includes an attenuator (V1, V2, V3). The passband of the two diplexers is determined to compensate for the faults caused by the distribution network. Advantageously, either of the two branches comprises an attenuator which is adjustable. The control of the adjustable attenuator is local or remote. The shape of the frequency response of such an equalizing device is regular when the value of the attenuation varies.

Claims10

Dependent claims

An equalizing device comprising:

a first and a second branch which are connected;
an input via a signal separation device to separate the frequencies of an input signal for producing a signal that occupies a first frequency band via the first branch, and a signal that occupies a second frequency band via the second branch;
and
at output via a recombining device to produce an output signal which occupies the first and second frequency bands based on the signals transmitted over the first and the second branch;
and wherein:
the first and second frequency bands correspond to a cutting off of a useful frequency band between a low part and a high part;
the first and second branches each include at least an attenuator, while the attenuation of the first attenuator is higher than that of the second attenuator;
and
the separation and recombining devices having a passband designed in such a way that the output signal SOUT has a substantially constant amplitude in said first and second frequency bands.

6 more elements

Dependencies are inferred from the claim text.