US 2025/0062746 A1 · TUNABLE SINGLE-INPUT DUAL-OUTPUT ACOUSTIC FILTER CIRCUIT

Abstract

A tunable single-input dual-output (SIDO) acoustic filter circuit is provided. Specifically, the tunable SIDO acoustic filter circuit includes one input port and two output ports. The input port is configured to receive a signal in a band-pass frequency range or in a band-stop frequency range outside the band-pass frequency range. When the signal is modulated in the band-pass frequency range, the acoustic band-pass and band-stop filter can output the signal via a first one of the output ports. When the signal is modulated in the band-stop frequency range, the acoustic band-pass and band-stop filter can output the signal via a second one of the output ports. In an embodiment, the band-pass frequency range, and accordingly the band-stop frequency range, can be statically or dynamically tuned by a tuning voltage. As such, the tunable SIDO acoustic filter circuit can be flexibly tuned to support a variety of band-pass and band-stop frequencies.

Claims20

Dependent claims

An acoustic resonator structure comprising:

a ferroelectric coupling layer configured to tune a band-pass frequency range in response to receiving a tuning voltage;
and
a pair of acoustic resonators coupled to each other via the ferroelectric coupling layer and interconnected between an input port and an output port to:
block a signal between the input port and the output port inside the band-pass frequency range;
and
pass the signal from the input port to the output port outside the band-pass frequency range.

3 more elements

A tunable single-input dual-output (SIDO) acoustic filter circuit comprising:

an input circuit configured to receive a signal and output the signal in a band-pass frequency range;
an output circuit configured to output the signal in a band-stop frequency range outside the band-pass frequency range;
and
an in-phase path and a quadrature path provided in parallel between the input circuit and the output circuit and each configured to:
block the signal in the band-pass frequency range to thereby cause the signal to be outputted from the input circuit;
and
pass the signal in the band-stop frequency range to thereby cause the signal to be outputted from the output circuit.

4 more elements

A wireless device comprising a tunable single-input dual-output (SIDO) acoustic filter circuit, the tunable SIDO acoustic filter circuit comprising:

an input circuit configured to receive a signal and output the signal in a band-pass frequency range;
an output circuit configured to output the signal in a band-stop frequency range outside the band-pass frequency range;
and
an in-phase path and a quadrature path provided in parallel between the input circuit and the output circuit and each configured to:
block the signal in the band-pass frequency range to thereby cause the signal to be outputted from the input circuit;
and
pass the signal in the band-stop frequency range to thereby cause the signal to be outputted from the output circuit.

4 more elements

Dependencies are inferred from the claim text.

Tunable single-input dual-output acoustic filter circuit

Life of this patent

Tunable single-input dual-output acoustic filter circuit

Life of this patent

Abstract

Claims20