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US 2019/0158262 A1Published application
Tunable filter for lte bands
AssigneeQorvo US, Inc.
InventorNadim Khlat
Life of this patent
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Abstract
A tunable filter reduces the total number of filters used in TDD (Time-Division Duplex) communication circuitry. The communication circuitry may include a tunable filter and a first switch associated with the tunable filter. The tunable filter may include a tuning component and a filtering component. The tuning component may be located with the first switch on a first die. The filtering component may be located in a laminate underneath the first switch. Power amplifiers for amplifying transmission signals may be located on a second die, and the second die may be located on the laminate.
Claims5
Communication circuitry comprising:
- a tunable filter comprising a tuning component and a filtering component that collectively filter within a first band when tuned to the first band and filter within a second band when tuned to the second band;
- a first amplifier configured to amplify a first transmission signal;
- a first switch configured to:
- in a first mode, receive the amplified first transmission signal and pass the amplified first transmission signal to the tunable filter;
- and
- in a second mode, receive a first reception signal from the tunable filter and pass the first reception signal towards a transceiver;
- an LTE (Long Term Evolution) band 40b filter that is one of a SAW (Surface Acoustic Wave) filter and a BAW (Bulk Acoustic Wave) filter;
- a second switch configured to:
- in the first mode, receive the first transmission signal and pass the first transmission signal to the LTE band 40b filter;
- and
- in the second mode, receive a second reception signal from the LTE band 40b filter and pass the second reception signal towards the transceiver;
- a second amplifier configured to amplify an LTE (Long Term Evolution) band 7 transmission signal;
- and
- a duplexer configured to receive the amplified LTE band 7 transmission signal;
- and
- wherein the tuning component and the first switch are located on a first die and the filtering component is not located on the first die.
13 more elements
Dependencies are inferred from the claim text.