公开(公告)号：US11984850B2

公开(公告)日：2024-05-14

申请号：US17876008

申请日：2022-07-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Udit Rawat ,  Bichoy Bahr ,  Swaminathan Sankaran

IPC: H03B5/24 ,  G01S13/88 ,  H03H9/02

CPC classification number: H03B5/24 ,  G01S13/88 ,  H03H9/02007

Abstract: An oscillator circuit includes a bulk acoustic wave resonator, a differential active inductor circuit, and a gain circuit. The differential active inductor circuit is configured to bias the bulk acoustic wave resonator. The differential active inductor circuit is coupled between the bulk acoustic wave resonator and a power supply terminal. The gain circuit is coupled to the bulk acoustic wave resonator.

公开(公告)号：US20250142241A1

公开(公告)日：2025-05-01

申请号：US18495675

申请日：2023-10-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Udit Rawat ,  Bichoy Bahr ,  Baher Haroun

IPC: H04R1/08

Abstract: An acoustic device is provided which comprises an audio system including: a microphone having a microphone output, and a processing circuit having a wakeup input, an audio input, and an audio output, the audio input coupled to the microphone output. In at least one example, the acoustic device further comprises an acoustic sensor separate from the microphone, the acoustic sensor having a sensor output. In at least one example, the acoustic device further comprises a wakeup circuit having a sensor input and a wakeup output, the sensor input coupled to the sensor output, wherein the wakeup output is coupled to the wakeup input.

公开(公告)号：US20250080920A1

公开(公告)日：2025-03-06

申请号：US18240668

申请日：2023-08-31

Applicant: Texas Instruments Incorporated

Inventor： Bichoy Bahr ,  Udit Rawat ,  Mohit Chawla ,  Yogesh Ramadass

IPC: H04R17/10 ,  H04R3/04 ,  H04R17/02 ,  H04R29/00 ,  H10N30/50 ,  H10N30/87

Abstract: In one example, an audio device includes a substrate, a first piezoelectric flap, a second piezoelectric flap, a transmit circuit, a first receive circuit, a switch circuit, and a second receive circuit. The substrate has an opening. The first piezoelectric flap has a first end on the substrate and extending over the opening, the first piezoelectric flap having first and second terminals. The second piezoelectric flap has a second end on the substrate and extending over the opening, the second piezoelectric flap spaced from the first piezoelectric flap, the second piezoelectric flap having third and fourth terminals. The transmit circuit has driver outputs. The first receive circuit has first receiver inputs. The switch circuit coupled to the driver outputs and the first receiver inputs, and the first and second terminals. The second receive circuit has second receiver inputs coupled to the third and fourth terminals.

公开(公告)号：US20250080918A1

公开(公告)日：2025-03-06

申请号：US18240676

申请日：2023-08-31

Applicant: Texas Instruments Incorporated

Inventor： Bichoy Bahr ,  Udit Rawat ,  Mohit Chawla ,  Yogesh Ramadass

IPC: H04R17/02 ,  H04R17/10 ,  H10N30/063 ,  H10N30/086 ,  H10N30/20 ,  H10N30/87

Abstract: In one example, an apparatus comprises a substrate, a first piezoelectric flap, and a second piezoelectric flap. The substrate has an opening. The first piezoelectric flap has a first end on the substrate and has a first portion extending over a first part of the opening, the first piezoelectric flap including first electrodes, in which the first electrodes extend no more than half of a first length of the first portion. The second piezoelectric flap has a second end on the substrate and has a second portion extending over a second part of the opening, the second piezoelectric flap including second electrodes, in which the second electrodes extend no more than half of a second length of the second portion.