Broadband absorptive-loading filter
AssigneeBroadcom Corporation
InventorIgnacio (Jose) Gorostegui
Life of this patent
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Abstract
In one embodiment, front end circuitry for an electronic appliance, the front end circuitry comprising: a first port configured to conduct signals from a signal source, the signals comprising a first signal and a second signal; a first filter coupled to the first port, the first filter configured to filter the first signal according to a first frequency band and output the filtered first signal for further processing; a second filter coupled to the first port and arranged in parallel with the first filter, the second filter configured to absorb the second signal according to a second frequency band that is a stopband for the first filter; and an impedance load coupled between an output of the second filter and ground.
Claims20
Front end circuitry for an electronic appliance, the front end circuitry comprising:
- a first port configured to conduct signals from a signal source, the signals comprising a first signal and a second signal;
- a first filter coupled to the first port, the first filter configured to filter the first signal according to a first frequency band and output the filtered first signal for further processing;
- a second filter coupled to the first port and arranged in parallel with the first filter, the second filter configured to absorb the second signal according to a second frequency band that is a stopband for the first filter;
- and
- an impedance load coupled between an output of the second filter and ground.
An electronic appliance, comprising:
- front end circuitry comprising:
- a first port configured to conduct signals from a signal source, the signals comprising a first signal and a second signal;
- a first filter coupled to the first port, the first filter configured to filter the first signal according to a first frequency band and output the filtered first signal for further processing;
- a second filter coupled to the first port and arranged in parallel with the first filter, the second filter configured to absorb the second signal according to a second frequency band that is a stopband for the first filter;
- and
- an impedance load coupled between an output of the second filter and ground.
A broadband absorptive-loading filter method, the method comprising:
- receiving at a first port signals from a signal source, the signals comprising a first signal and a second signal;
- filtering by a first filter the first signal according to a first frequency band and outputting the filtered first signal for further processing, the first filter coupled to the first port;
- and
- absorbing by a second filter the second signal according to a second frequency band that is a stopband for the first filter, the second filter coupled to the first port and arranged in parallel with the first filter, the second filter coupled to a grounded impedance load.
Dependencies are inferred from the claim text.