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US 2026/0303064 A1Published application
Switchable acoustic filter topologies with improved performance
AssigneeSkyworks Solutions, Inc.
InventorsKun Chen, Hao Wang, Li Chen, Ahmad Adel Ahmad Gheethan, Zhi Shen
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Abstract
An adjustable filter having a first contact; a second contact; and one or more switchable resonator circuits coupled between the first contact and the second contact, each switchable resonator circuit including a switch, a first impedance, and a resonator coupled in parallel with a second impedance, a parallel combination of the resonator and second impedance being coupled in series with the first impedance.
Claims20
A triplexer comprising:
- an antenna contact;
- a first filter path contact;
- a second filter path contact;
- a third filter path contact;
- a first filter branch coupled between the antenna contact and the first filter path contact;
- a second filter branch coupled between the antenna contact and the second filter path contact;
- a third filter branch coupled between the antenna contact and the third filter path contact;
- and
- one or more switchable resonators coupled to one or more of the first filter branch, the second filter branch, and the third filter branch.
6 more elements
A method of adjusting a resonance frequency and an antiresonance frequency of a filter, comprising:
- selectively controlling a first switch to be in a first closed state or first open state, the first switch being coupled in parallel with a first impedance, a first combination of the first switch and the first impedance being coupled in series with a first resonator, the resonance frequency depending on a first state of the first switch;
- and
- selectively controlling a second switch to be in a second closed state or a second open state, the second switch being coupled in series with a second impedance, a second combination of the second switch and the second impedance being coupled in parallel with a second resonator, the antiresonance frequency depending on a second state of the second switch.
A system comprising:
- a first filter coupled to a plurality of switchable filters, each switchable filter of the plurality of switchable filters including a first combination of a first switch coupled in parallel to a first impedance, the first combination being coupled in series with a first resonator, and a second combination of a second switch coupled in series with a second impedance, the second combination being coupled in parallel with a second resonator.
Dependencies are inferred from the claim text.