公开(公告)号：US20220029505A1

公开(公告)日：2022-01-27

申请号：US17497110

申请日：2021-10-08

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Aleksey KHENKIN ,  Siddharth MARU ,  Tejasvi DAS ,  Emmanuel MARCHAIS ,  Vadim KONRADI ,  Viral PARIKH ,  Jon D. HENDRIX ,  Marco A. JANKO

IPC: H02K7/065 ,  G01D5/243 ,  H02K41/03 ,  G06F3/01 ,  G01R27/26

Abstract: A system for detecting displacement of a movable member of an electromagnetic transducer having a magnetic coil-driven linear actuator with a static member and a movable mass mechanically coupled to the static member and having a back electromotive force present across terminals of a coil of the electromagnetic transducer is provided. The system may include a resistive-inductive-capacitive sensor comprising the coil, a driver configured to drive the resistive-inductive-capacitive sensor with a driving signal, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to measure one or more of phase information and amplitude information associated with the resistive-inductive-capacitive sensor and based on the one or more of phase information and amplitude information, determine a displacement of movable mass, wherein the displacement of the movable mass causes a change in an impedance of the resistive-inductive-capacitive sensor.

公开(公告)号：US20210328535A1

公开(公告)日：2021-10-21

申请号：US16850843

申请日：2020-04-16

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Aleksey KHENKIN ,  Steve PROFFITT ,  Marco JANKO

IPC: H02P25/034 ,  G08B6/00

Abstract: A method for minimizing undesired movement of a moving mass of an electromagnetic load may include detecting undesired movement of the moving mass based on real-time measurements of one or more parameters associated with the electromagnetic load and, responsive to detecting undesired movement of the moving mass, affecting a signal applied to the moving mass to reduce the undesired movement.

公开(公告)号：US20210325967A1

公开(公告)日：2021-10-21

申请号：US16850904

申请日：2020-04-16

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Aleksey KHENKIN ,  Jun YAN ,  Marco JANKO ,  Michael MCKNIGHT

IPC: G06F3/01 ,  H02N11/00 ,  G01R33/028

Abstract: A method may include measuring an electrical parameter of an electromagnetic load having a moving mass during the absence of a driving signal actively driving the electromagnetic load, measuring a mechanical parameter of mechanical motion of a host device comprising the electromagnetic load, correlating a relationship between the mechanical parameter and the electrical parameter, and calibrating the electromagnetic load across a plurality of mechanical motion conditions based on the relationship.

公开(公告)号：US20250076343A1

公开(公告)日：2025-03-06

申请号：US18666028

申请日：2024-05-16

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Aleksey KHENKIN ,  Ravi K. KUMMARAGUNTLA ,  John C. TUCKER ,  John L. MELANSON

IPC: G01R15/14 ,  G01R19/00

Abstract: In accordance with embodiments of the present disclosure, a system may include a main integrated circuit (IC) comprising current measurement circuitry, an auxiliary current sense resistor coupled to the main IC, and an auxiliary pair of Kelvin sense resistors coupled between the auxiliary current sense resistor and the current measurement circuitry. The main IC may further comprise current injection circuitry configured to inject a known sink current which is split between a main current in a first path and an auxiliary current in a second path comprising the auxiliary current sense resistor.

公开(公告)号：US20240114288A1

公开(公告)日：2024-04-04

申请号：US18073853

申请日：2022-12-02

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Ning LI ,  Hamid SEPEHR ,  Ben LESLIE ,  Aleksey KHENKIN ,  Michael KUREK ,  Marco A. JANKO ,  Vadim KONRADI ,  Peter FOSKEY ,  Aaron TREPTOW

IPC: H04R3/00 ,  H04R9/02 ,  H04R29/00

CPC classification number: H04R3/007 ,  H04R9/022 ,  H04R29/001 ,  H04R2400/03

Abstract: A method of controlling a vibrational transducer, the method comprising: tracking a temperature metric of the vibrational transducer; and controlling a drive signal for the vibrational transducer, where the drive signal is limited to a value to protect the vibrational transducer from over excursion, and where said value is a function of the tracked temperature metric.

公开(公告)号：US20170180858A1

公开(公告)日：2017-06-22

申请号：US15198809

申请日：2016-06-30

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Sunder S. KIDAMBI ,  John C. TUCKER ,  Aleksey KHENKIN

IPC: H04R3/06 ,  H04R29/00

CPC classification number: H04R3/06 ,  H04R29/004 ,  H04R2201/003

Abstract: In accordance with embodiments of the present disclosure, a system may include a digital correcting network for correcting for an intrinsic highpass filter of a microelectromechanical systems (MEMS) microphone such that a combined phase and magnitude response of a cascade of the intrinsic highpass filter and the digital correcting network substantially approximates the response of a target highpass filter.