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US 12,763,799 B2Granted
Circuits for filtering radio-frequency signals
AssigneeSkyworks Solutions, Inc.
InventorDavid Richard Pehlke
Life of this patent
Estimating the term…
Abstract
Embodiments of the invention relate to a switching circuit that includes a first signal path for a first frequency range, a second signal path for a second frequency range, and one or more switches. Each of the first and second signal paths may include one or more filters configured to pass a respective region of the first or second frequency ranges. The one or more switches are configured to select one or more signal path filters based on a control signal. Related methods for filtering a radio-frequency signal, radio-frequency modules and wireless devices are also provided.
Claims20
A radio-frequency switching circuit, comprising:
- a first signal path for a first frequency range;
- a second signal path for a second frequency range, the first and second frequency ranges being adjacent to each other;
- first signal path filters each configured to pass a respective region of the first frequency range, the first signal path filters including a first filter and a second filter, the respective region of the first filter including a first band and a second band that are separate from each other in frequency, the respective region of the second filter including a sub-band of the first band and a sub-band of the second band such that the second filter has a reduced bandwidth relative to the first filter;
- second signal path filters each configured to pass a respective region of the second frequency range, the respective regions being smaller than the second frequency range and being between the first band and the second band, the second signal path filters including a third filter and a fourth filter, the respective region of the third filter having a larger gap in frequency offset from the first band than the fourth filter, and the respective region of the fourth filter having a larger gap in frequency offset from the second band than the third filter;
- and
- one or more switches configured to select one of the first signal path filters and one of the second signal path filters based on a control signal, and to connect the selected one of the first signal path filters with the selected one of the second signal path filters.
3 more elements
A radio-frequency switching circuit for multiple signal bands, comprising:
- a first signal path for a first frequency range;
- a second signal path for a second frequency range, the first and second frequency ranges being adjacent to each other;
- first signal path filters including a first filter and a second filter, the first filter configured to pass a first band and a second band within the first frequency range, and the second filter configured to pass a sub-band of the first band and a sub-band of the second band such that the second filter has a reduced bandwidth relative to the first filter;
- a second signal path filter configured to pass a region of the second frequency range that is between the first band and the second band, the region having a larger gap in frequency offset from the sub-band of the first band than the first band, and having a larger gap in frequency offset from the sub-band of the second band than the second band;
- and
- one or more switches configured to select one of the first signal path filters based on a control signal and to connect the selected one of the first signal path filters to the second signal path filter.
3 more elements
A radio-frequency module comprising:
- a packaging substrate configured to receive a plurality of components;
- and
- a semiconductor die implemented on the packaging substrate, the semiconductor die including a radio-frequency switching circuit, the radio-frequency switching circuit including a first signal path for a first frequency range;
- a second signal path for a second frequency range, the first and second frequency ranges being adjacent to each other;
- first signal path filters including a first filter and a second filter, the first filter configured to pass a first band and a second band within the first frequency range, and the second filter configured to pass a sub-band of the first band and a sub-band of the second band such that the second filter has a reduced bandwidth relative to the first filter;
- a second signal path filter configured to pass a region of the second frequency range that is between the first band and the second band, the region having a larger gap in frequency offset from the sub-band of the first band than the first band, and having a larger gap in frequency offset from the sub-band of the second band than the second band;
- and one or more switches configured to select one of the first signal path filters based on a control signal and to connect the selected one of the first signal path filters to the second signal path filter.
4 more elements
Dependencies are inferred from the claim text.