公开(公告)号：US20200343871A1

公开(公告)日：2020-10-29

申请号：US16928444

申请日：2020-07-14

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Johann G. GABORIAU ,  David M. OLIVENBAUM ,  Xiaofan FEI ,  Amar VELLANKI ,  Venugopal CHOUKINISHI ,  Gautham SIVASANKAR ,  Wai-Shun SHUM

IPC: H03G3/30 ,  H03F3/217

Abstract: A method for calibrating gain in a multi-path subsystem having a first processing path, a second processing path, and a mixed signal return path, may include low-pass filtering an input signal and a mixed signal return path signal generated from the input signal at subsonic frequencies to generate a filtered input signal and a filtered mixed signal return path signal and tracking and correcting for a gain difference between the first processing path and the second processing path based on the filtered input signal and the filtered mixed signal return path signal.

公开(公告)号：US20230379592A1

公开(公告)日：2023-11-23

申请号：US18318896

申请日：2023-05-17

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Wai-Shun SHUM ,  Amar VELLANKI ,  Jeffrey SKARZYNSKI ,  Gautham S. SIVASANKAR ,  Xingdong DAI ,  Venugopal CHOUKINISHI ,  Xiaofan FEI ,  Xin ZHAO

IPC: H04N23/90

CPC classification number: H04N23/90

Abstract: A system for relaying communication for a PHY/data link level communication protocol may include a first device having a first and second transceiver, the first transceiver having a first protocol controller configured to detect a first bus condition and second transceiver having a second protocol controller configured to detect a second bus condition and a switching matrix coupled to the first and second transceiver and configured to operate in a relaying mode to enable: the first protocol controller to control a physical layer of the second transceiver and enables the second protocol controller to control a physical layer of the first transceiver, a physical layer of a first transmitter of the first transceiver to receive an output of a second receiver of the second transceiver, and the physical layer of a second transmitter of the second transceiver to receive an output of a first receiver of the first transceiver.

公开(公告)号：US20240187205A1

公开(公告)日：2024-06-06

申请号：US18471856

申请日：2023-09-21

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Jeffrey SKARZYNSKI ,  Wai-Shun SHUM ,  Amar VELLANKI ,  Venugopal CHOUKINISHI ,  Xin ZHAO ,  John L. MELANSON

IPC: H04L7/033 ,  H04J3/06

CPC classification number: H04L7/033 ,  H04J3/0688

Abstract: A system may include a plurality of devices coupled to one another via a shared digital wired communication link, the plurality of devices comprising a first device configured to periodically transmit a synchronization packet onto the shared digital wired communication link to synchronize other of the plurality of devices to a reference clock of the first device, a second device configured to receive the synchronization packet and transmit one or more first data packets onto the shared digital wired communication link in response to the synchronization packet, and a third device configured to receive the synchronization packet and transmit one or more second data packets onto the shared digital wired communication link in response to the synchronization packet and the one or more second data packets.

公开(公告)号：US20190257866A1

公开(公告)日：2019-08-22

申请号：US16121259

申请日：2018-09-04

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Gautham S. SIVASANKAR ,  Tejasvi DAS ,  Emmanuel MARCHAIS ,  Amar VELLANKI ,  Leyi YIN ,  John L. MELANSON ,  Venugopal CHOUKINISHI

IPC: G01R25/00 ,  H03F3/183 ,  H03G3/30 ,  H03G3/00 ,  H04R3/00

Abstract: A method of determining a phase misalignment between a first signal generated from a first signal path and a second signal generated from a second signal path may include obtaining multiple samples of the first signal proximate to when the first signal crosses zero wherein the first signal can be approximated as linear; obtaining multiple samples of the second signal proximate to when the second signal crosses zero wherein the first signal can be approximated as linear; based on the multiple samples of the first signal, approximating a first time at which the first signal crosses zero; based on the multiple samples of the second signal, approximating a second time at which the second signal crosses zero; and determining the phase misalignment between the first signal and the second signal based on a difference between the first time and the second time.