Simplified acoustic RF resonator parallel capacitance compensation
AssigneeQorvo US, Inc.
InventorsNadim Khlat, Jean-Frederic Chiron, Marcus Granger-Jones, Andrew F. Folkmann, Robert Aigner
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Abstract
RF circuitry, which includes a first acoustic RF resonator (ARFR) and a first compensating ARFR, is disclosed. A first inductive element is coupled between the first compensating ARFR and a first end of the first ARFR. A second inductive element is coupled between the first compensating ARFR and a second end of the first ARFR. The first compensating ARFR, the first inductive element, and the second inductive element at least partially compensate for a parallel capacitance of the first ARFR.
Claims18
RF circuitry comprising:
- a first acoustic RF resonator (ARFR);
- and
- a parallel capacitance compensation circuit comprising:
- a first compensating ARFR:
- a first inductive element coupled between the first compensating ARFR and a first end of the first ARFR;
- a second inductive element coupled between the first compensating ARFR and a second end of the first ARFR, wherein:
- the first compensating ARFR, the first inductive element, and the second inductive element are configured to at least partially compensate for a parallel capacitance of the first ARFR;
- and
- the parallel capacitance compensation circuit is configured to increase a ratio of a parallel resonant frequency of the first ARFR to a series resonant frequency of the first ARFR.
RF circuitry comprising a first RF RX bandpass filter, which comprises:
- a first acoustic RF resonator (ARFR);
- a first compensating ARFR;
- a first inductive element, which is coupled between the first compensating ARFR and a first end of the first ARFR;
- a second inductive element, which is coupled between the first compensating ARFR and a second end of the first ARFR;
- and
- a first plurality of ARFRs coupled in series between the first ARFR and a first RF antenna, wherein:
- the first RF RX bandpass filter is configured to receive and filter a first antenna, first RF RX signal via the first RF antenna to provide a first antenna, first upstream RF RX signal via the first ARFR;
- and
- the first compensating ARFR, the first inductive element, and the second inductive element are configured to at least partially compensate for a parallel capacitance of the first ARFR.
Dependencies are inferred from the claim text.