US 2019/0157862 A1 · FILTER CIRCUIT

Abstract

A filter circuit includes a signal input terminal, a gas discharging tube, a signal output terminal, and a filter. The signal input terminal is configured to receive a communication signal. The gas discharging tube is coupled between the signal input terminal and a natural ground terminal. The signal output terminal is configured to provide a filtered communication signal. The filter is coupled between the signal input terminal and the signal output terminal. The filter includes a first high voltage capacitor, a second high voltage capacitor, and a main filter element. The first high voltage capacitor is coupled between the signal input terminal and an electronic ground terminal. The second high voltage capacitor is coupled between the signal output terminal and the electronic ground terminal. The main filter element is coupled between the signal input terminal and the signal output terminal.

Claims8

Dependent claims

A filter circuit comprising:

a signal input terminal configured to receive a communication signal;
a gas discharging tube coupled between the signal input terminal and a natural ground terminal;
at least one signal output terminal configured to output the communication signal which is filtered;
and
at least one filter coupled between the signal input terminal and the corresponding signal output terminal, the at least one filter comprising a first sub-filter, the first sub-filter comprising:
a first high voltage capacitor coupled between the signal input terminal and an electronic ground terminal;
a second high voltage capacitor coupled between the corresponding signal output terminal and the electronic ground terminal;
and
a filter inductor coupled between the signal input terminal and the corresponding signal output terminal.

6 more elements

Dependencies are inferred from the claim text.

Filter circuit

Life of this patent

Filter circuit

Life of this patent

Abstract

Claims8