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US 2003/0078005 A1Published application
Apparatus and methods for noise suppression in communications systems
AssigneeAirnet Ltd.
InventorElyahu Recht
Life of this patent
Estimating the term…
Abstract
A communication circuit and method including communications circuitry having an input and an output and a noise suppressor. The noise suppressor includes an amorphous magnetic core and a bifilar winding around said amorphous magnetic core.
Claims76
A communication circuit comprising:
- communications circuitry having an input and an output;
- and
- a noise suppressor comprising:
- an amorphous magnetic core and
- a bifilar winding around said amorphous magnetic core.
2 more elements
A noise suppressor assembly comprising:
- a multiplicity of noise suppressors, at least one of said multiplicity of noise suppressors including:
- an amorphous magnetic core;
- and
- a bifilar winding wound around said amorphous magnetic core.
1 more element
A noise suppressor assembly comprising at least one noise suppressor including:
- a core including ferrite and an amorphous magnetic material;
- and
- a bifilar winding wound around said core.
A wide band noise suppressor comprising
- a core assembly comprising a multiplicity of amorphous magnetic cores;
- and
- a bifilar winding wound around said core assembly.
A wide band noise suppressor comprising
- a core comprising a mixture of a plurality of different amorphous magnetic materials;
- and
- a bifilar winding wound around said core.
A signal to interference enhancer comprising:
- at least one passive analog circuit operative to decrease radio frequency interference in a received signal;
- and
- at least one active analog circuit operative to decrease radio frequency interference in said received signal,
- said at least one passive analog circuit and said at least one active analog circuit being arranged in series for providing radio frequency signal to interference enhancement to said received signal.
1 more element
A signal to interference enhancer comprising:
- a low-pass EMI filter operative to attenuate interference at frequencies above a desired frequency pass band;
- and
- a plurality of cascaded common mode chokes connected in series with said EMI filter, said common mode chokes being operative to attenuate interference at frequencies within said desired frequency pass band.
A signal to interference enhancer embodied in a circuit package and comprising:
- a low-pass EMI filter operative to attenuate interference at frequencies above a desired frequency pass band;
- a plurality of cascaded common mode chokes connected in series with said EMI filter, said common mode chokes being operative to attenuate interference at frequencies within said desired frequency pass band;
- and
- metallic barriers located at said filter and at said cascaded common mode chokes in order to reduce parasitic input to output interference coupling.
1 more element
A communication noise suppressing method comprising:
- providing a communications circuitry having an input and an output;
- providing an amorphous magnetic core;
- winding a bifilar winding around said amorphous magnetic core and in series with at least one of said communications circuitry input and communications circuitry output;
- and
- passing a communication signal from said input, through said bifilar winding and to said output for suppressing noise in said communication signal.
2 more elements
A noise suppressing method comprising:
- providing a multiplicity of magnetic cores, at least one of said multiplicity of magnetic cores comprising an amorphous magnetic core;
- winding a bifilar winding around each of said plurality of magnetic cores;
- connecting said bifilar windings in series;
- and
- passing a signal through said bifilar windings for suppressing noise in said signal.
2 more elements
A noise suppressing method comprising:
- providing at least one core including ferrite and an amorphous magnetic material;
- winding a bifilar winding around said at least one core;
- and
- passing a signal through said bifilar winding for suppressing noise in said signal.
1 more element
A wide band noise suppressing method comprising:
- providing a core assembly comprising a multiplicity of amorphous magnetic cores;
- winding a bifilar winding wound around said core assembly;
- and
- passing a signal through said bifilar winding for suppressing noise in said signal.
1 more element
A wide band noise suppressing method comprising:
- providing a core comprising a mixture of a plurality of different amorphous magnetic materials;
- winding a bifilar winding wound around said core;
- and
- passing a signal through said bifilar winding for suppressing noise in said signal.
1 more element
A signal to interference enhancing method comprising:
- providing at least one passive analog circuit operative to decrease radio frequency interference in a received signal;
- providing at least one active analog circuit operative to decrease radio frequency interference in said received signal;
- arranging said at least one passive analog circuit and said at least one active analog circuit in series;
- and
- passing a radio frequency signal through said passive analog circuit and said active analog circuit for enhancing said signal to interference therein.
2 more elements
A signal to interference enhancing method comprising:
- employing a low-pass EMI filter to attenuate interference above a desired frequency pass band;
- employing a plurality of cascaded common mode chokes connected in series with said EMI filter to attenuate interference at frequencies within said desired frequency pass band;
- and
- passing a signal through said low-pass EMI filter and said plurality of cascaded common mode chokes for suppressing noise in said signal.
1 more element
A signal to interference enhancing method comprising:
- employing a low-pass EMI filter to attenuate interference at frequencies above a desired frequency pass band;
- employing a plurality of cascaded common mode chokes connected in series with said EMI filter to attenuate interference at frequencies within said desired frequency pass band;
- and
- employing a metallic barriers located at said filter and at said cascaded common mode chokes to reduce parasitic input to output interference coupling.
1 more element
A signal to interference enhancer according to claim 56 and wherein said amorphous material comprises at least one of cobalt and nickel.
A noise suppressor comprising:
- an amorphous magnetic core;
- and
- a bifilar winding wound around said amorphous magnetic core, and
- wherein said amorphous magnetic core has a closed E shape.
1 more element
A signal to interference enhancer comprising:
- at least one passive analog circuit operative to decrease radio frequency interference in a received signal;
- and
- at least one active analog circuit operative to decrease radio frequency interference in said received signal,
- said at least one passive analog circuit and said at least one active analog circuit being arranged in series for providing radio frequency signal to interference enhancement to said received signal;
- and
- said at least one active analog circuit operative to interface with a modem.
3 more elements
A signal to interference enhancer comprising:
- at least one passive analog circuit operative to decrease radio frequency interference in a received signal;
- and
- at least one active analog circuit operative to decrease radio frequency interference in said received signal,
- said at least one passive analog circuit and said at least one active analog circuit being arranged in series for providing radio frequency signal to interference enhancement to said received signal;
- and
- said at least one active analog circuit operative to interface with an A/D converter.
3 more elements
A signal to interference enhancing repeater comprising:
- a first passive analog circuit operative to decrease radio frequency interference in a received signal;
- at least one active analog circuit operative to decrease radio frequency interference in said received signal;
- and
- a second passive analog circuit operative to decrease radio frequency interference in a received signal,
- said first passive analog circuit and said active analog circuit and said second passive analog circuit being arranged in series for providing radio frequency signal to interference enhancement to said received signal;
- and
- said at least one active analog circuit operative as an analog repeater.
4 more elements
A signal to interference enhancer comprising:
- at least one passive analog circuit comprising a differential input and operative to decrease radio frequency interference in a received signal;
- and
- at least one active analog circuit comprising a single-ended output and operative to decrease radio frequency interference in said received signal,
- said at least one passive analog circuit and said at least one active analog circuit being arranged in series for providing radio frequency signal to interference enhancement to said received signal;
- and wherein said differential input serves as the input of the cascaded circuit and said single-ended output serves as the output of the cascaded circuits.
2 more elements
A signal to interference enhancer comprising:
- at least one passive analog circuit operative to decrease radio frequency interference in a received signal;
- and
- at least one active analog circuit operative to decrease radio frequency interference in said received signal,
- said at least one passive analog circuit and said at least one active analog circuit being arranged in series for providing radio frequency signal to interference enhancement to said received signal;
- and
- the first said of at least one passive analog circuit comprising a differential input and the last of said at least one active analog circuit comprising a single-ended output.
3 more elements
A signal to interference enhancer comprising:
- at least one passive analog circuit operative to decrease radio frequency interference in a received signal;
- and
- at least one active analog circuit operative to decrease radio frequency interference in said received signal,
- said at least one passive analog circuit and said at least one active analog circuit being arranged in series for providing radio frequency signal to interference enhancement to said received signal;
- and
- the first of said at least one passive analog circuit comprising a single-ended input and the last of said at least one active analog circuit comprising a single-ended output.
3 more elements
A signal to interference enhancer comprising:
- at least one passive analog circuit operative to decrease radio frequency interference in a received signal;
- and
- at least one active analog circuit operative to decrease radio frequency interference in said received signal,
- said at least one passive analog circuit and said at least one active analog circuit being arranged in series for providing radio frequency signal to interference enhancement to said received signal;
- and
- the first of said at least one passive analog circuit comprising a single-ended input and the last of said at least one active analog circuit comprising a differential output.
3 more elements
A signal to interference enhancer comprising:
- at least one passive analog circuit operative to decrease radio frequency interference in a received signal;
- and
- at least one active analog circuit operative to decrease radio frequency interference in said received signal,
- said at least one passive analog circuit and said at least one active analog circuit being arranged in series for providing radio frequency signal to interference enhancement to said received signal;
- and
- said at least one active analog circuit operative to interface with an XDSL modem.
3 more elements
A noise suppressing transformer assembly comprising:
- at least one noise suppressor comprising:
- an amorphous magnetic core;
- and
- a bifilar winding wound around said amorphous magnetic core;
- and
- a transformer comprising:
- at least one core comprising at least a ferrite material;
- and
- at least one coil wound about said at least one core,
- said at least one noise suppressor and said transformer being arranged in series.
7 more elements
A signal to interference enhancer embodied in a circuit package and comprising:
- a low-pass EMI filter operative to attenuate interference at frequencies above a desired frequency pass band;
- and
- a plurality of cascaded common mode chokes connected in series with said EMI filter, said common mode chokes being operative to attenuate interference at frequencies within said desired frequency pass band;
- and
- each of said low-pass EMI filter and said plurality of cascaded common mode being contained in a separate metallic enclosure.
2 more elements
A signal to interference enhancer embodied in a circuit package and comprising:
- a low-pass EMI filter operative to attenuate interference at frequencies above a desired frequency pass band;
- and
- a plurality of cascaded common mode chokes connected in series with said EMI filter, said common mode chokes being operative to attenuate interference at frequencies within said desired frequency pass band;
- said plurality of cascaded common mode chokes being contained in a metal enclosure and said EMI filter being embodied in a feed-through device inserted in a wall of said enclosure.
1 more element
A transformer comprising:
- at least one core comprising at least one of metal-based amorphous material and a ferrite material;
- at least one coil wound about said at least one core;
- and
- at least one aluminum foil shield wound around at said least one coil.
1 more element
A noise suppressor embodied in a circuit package comprising:
- an amorphous magnetic core;
- a bifilar winding wound around said amorphous magnetic core, said bifilar winding comprising an input portion and an output portion;
- and
- a metallic barrier located across said amorphous magnetic core and between said input portion and said output portion in order to reduce parasitic input to output interference coupling.
1 more element
Dependencies are inferred from the claim text.