公开(公告)号：US20240310920A1

公开(公告)日：2024-09-19

申请号：US18676043

申请日：2024-05-28

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Harsha RAO ,  Rong HU ,  Carl Lennart STÅHL ,  Jie SU ,  Vadim KONRADI ,  Teemu RAMO ,  Anthony Stephen DOY

IPC: G06F3/01 ,  G06F3/041 ,  G06F3/044

CPC classification number: G06F3/016 ,  G06F3/01 ,  G06F3/0414 ,  G06F3/0416 ,  G06F3/044

Abstract: An integrated haptic system may include a digital signal processor and an amplifier communicatively coupled to the digital signal processor and integrated with the digital signal processor into the integrated haptic system. The digital signal processor may be configured to receive a force sensor signal indicative of a force applied to a force sensor and generate a haptic playback signal responsive to the force. The amplifier may be configured to amplify the haptic playback signal and drive a vibrational actuator communicatively coupled to the amplifier with the haptic playback signal as amplified by the amplifier.

公开(公告)号：US20200272239A1

公开(公告)日：2020-08-27

申请号：US16871832

申请日：2020-05-11

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Harsha RAO ,  Rong HU ,  Carl Lennart STÅHL ,  Jie SU ,  Vadim KONRADI ,  Teemu RAMO ,  Anthony Stephen DOY

IPC: G06F3/01 ,  G06F3/041 ,  G06F3/044

Abstract: An integrated haptic system may include a digital signal processor and an amplifier communicatively coupled to the digital signal processor and integrated with the digital signal processor into the integrated haptic system. The digital signal processor may be configured to receive a force sensor signal indicative of a force applied to a force sensor and generate a haptic playback signal responsive to the force. The amplifier may be configured to amplify the haptic playback signal and drive a vibrational actuator communicatively coupled to the amplifier with the haptic playback signal as amplified by the amplifier.

公开(公告)号：US20190294247A1

公开(公告)日：2019-09-26

申请号：US16207547

申请日：2018-12-03

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Rong HU ,  Jie SU

IPC: G06F3/01 ,  B06B1/06

Abstract: Embodiments described herein relate to methods and apparatus for driving a haptic transducer with a driving signal. The method comprises estimating, based on a current through the haptic transducer and a terminal voltage across the haptic transducer, a back electromotive force, EMF, voltage representative of a velocity of a mass in the haptic transducer; comparing a phase of a voltage signal derived from the terminal voltage with a phase of the estimated back EMF voltage; and based on the comparison, adjusting a frequency or a phase of an output signal, wherein the driving signal is derived from the output signal, such that a frequency of the driving signal converges to a resonant frequency of the haptic transducer.

公开(公告)号：US20180302714A1

公开(公告)日：2018-10-18

申请号：US16013545

申请日：2018-06-20

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Rong HU ,  Jie SU

IPC: H04R3/02 ,  H04R29/00 ,  H04R3/04 ,  H04R3/00

Abstract: In accordance with embodiments of the present disclosure, a method may include using an adaptive filter system to estimate a response of an electrical characteristic of a loudspeaker based on an error between a first electrical parameter of the loudspeaker and a second electrical parameter of the loudspeaker and adding a non-zero delay to the first electrical parameter relative to the second electrical parameter prior to calculation of the error such that the adaptive filter system captures a truncated non-causality of the electrical characteristic.

公开(公告)号：US20180206034A1

公开(公告)日：2018-07-19

申请号：US15918705

申请日：2018-03-12

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Roger SERWY ,  Jason W. LAWRENCE ,  Firas AZRAI ,  Jeffrey Allen MAY ,  Jie SU

IPC: H04R3/00 ,  H03F3/183 ,  H03F3/21 ,  H04R29/00

CPC classification number: H04R3/007 ,  H03F1/52 ,  H03F3/183 ,  H03F3/21 ,  H03F2200/03 ,  H03F2200/211 ,  H04R1/1041 ,  H04R3/00 ,  H04R29/001 ,  H04R2430/01 ,  H04R2460/03

Abstract: A predictive brownout prevention system may be configured to prevent brownout of an audio output signal. Particularly, the brownout prevention system may be configured to receive information indicative of adaptive estimates of power supply conditions, wherein the information indicative of adaptive estimates of the power supply conditions comprises information regarding a voltage component and a resistive component received from an adaptive battery model of a battery for providing electrical energy to a power supply for generating the power supply voltage and adapt the adaptive battery model based on a monitored battery voltage output by the battery and loading events of the signal path and excluding loading events of components other than the signal path which are powered from the battery.

公开(公告)号：US20170280240A1

公开(公告)日：2017-09-28

申请号：US15453718

申请日：2017-03-08

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Rong HU ,  Jie SU

IPC: H04R3/02 ,  H04R29/00 ,  H04R3/00 ,  H04R3/04

CPC classification number: H04R3/02 ,  H04R3/007 ,  H04R3/04 ,  H04R29/001

Abstract: In accordance with embodiments of the present disclosure, a method may include using an adaptive filter system to estimate a response of an electrical characteristic of a loudspeaker based on an error between a first electrical parameter of the loudspeaker and a second electrical parameter of the loudspeaker and adding a non-zero delay to the first electrical parameter relative to the second electrical parameter prior to calculation of the error such that the adaptive filter system captures a truncated non-causality of the electrical characteristic.