公开(公告)号：US10713184B2

公开(公告)日：2020-07-14

申请号：US15988593

申请日：2018-05-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert David Rand ,  Bradley Allan Lambert

IPC: G06F13/38 ,  G06F13/40 ,  G06F13/42 ,  G06F13/10 ,  G06F3/16 ,  G06F1/3234 ,  G06F1/3215

Abstract: Interface circuitry is provided for a host device, the interface circuitry for controlling data connections between the host device and a peripheral device. The interface circuitry comprises: a discovery module, operable to detect mating of a connector of the peripheral device with a connector of the host device, and to store an indication of the current mating status of the connector of the host device; and a data connection management module, configured to: responsive to detection of mating between the connector of the peripheral device and the connector of the host device by the discovery module, establish a digital data connection between the connector of the peripheral device and the connector of the host device; responsive to detection of a deactivation event and based on the stored indication of the mating, deactivate the digital data connection; and responsive to detection of an activation event and based on the stored indication of the mating, re-establish the digital data connection between the connector of the peripheral device and the connector of the host device.

公开(公告)号：US10691780B2

公开(公告)日：2020-06-23

申请号：US15667849

申请日：2017-08-03

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Sunil Saunders ,  Robert David Rand ,  Robert James Hatfield ,  John Laurence Pennock

IPC: G06F21/32 ,  H04W12/06 ,  H04L29/06 ,  G06F1/3231 ,  G06K9/00 ,  G06K9/62 ,  G10L17/22 ,  G06F3/16 ,  G06K9/68 ,  G10L17/02

Abstract: An electronic device, comprising one or more input devices, for receiving biometric input from a user and generating one or more biometric input signals; an applications processor; a mixer configurable by the applications processor to provide a first signal path between one or more of the input devices and the applications processor; and a biometric authentication module coupled to the one or more input devices via a second signal path that does not include the mixer, for performing authentication of at least one of the one or more biometric input signals.

公开(公告)号：US10198386B2

公开(公告)日：2019-02-05

申请号：US15051995

申请日：2016-02-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert David Rand ,  Graeme Gordon MacKay ,  Andrew James Howlett

IPC: G06F13/00 ,  G06F13/38 ,  G06F13/12 ,  G06F13/40

Abstract: This application relates to methods and apparatus for transfer of data between a host device (400) and a peripheral device (300) via a USB Type-C connector (100; 304) of the host device. A data controller is described that has a path controller (309, 310; 706) for establishing signal paths between circuitry of the host device and contacts (101) of said USB Type-C connector. The path controller is operable in at least first and second modes. In the first mode the path controller establishes separate signal paths to each of at least first, second, third and fourth contacts (A6, A7, B6, B7) of the USB Type-C connector and a plurality of the established signal paths are for transfer of analog audio data. In the second mode the path controller establishes a pair of signal paths to only a subset of said first to fourth contacts to provide a differential digital data path.

公开(公告)号：US20160246747A1

公开(公告)日：2016-08-25

申请号：US15051995

申请日：2016-02-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert David Rand ,  Graeme Gordon MacKay ,  Andrew James Howlett

IPC: G06F13/38 ,  G06F13/40 ,  G06F13/12

CPC classification number: G06F13/385 ,  G06F13/122 ,  G06F13/382 ,  G06F13/4022

Abstract: This application relates to methods and apparatus for transfer of data between a host device (400) and a peripheral device (300) via a USB Type-C connector (100; 304) of the host device. A data controller is described that has a path controller (309, 310; 706) for establishing signal paths between circuitry of the host device and contacts (101) of said USB Type-C connector. The path controller is operable in at least first and second modes. In the first mode the path controller establishes separate signal paths to each of at least first, second, third and fourth contacts (A6, A7, B6, B7) of the USB Type-C connector and a plurality of the established signal paths are for transfer of analogue audio data. In the second mode the path controller establishes a pair of signal paths to only a subset of said first to fourth contacts to provide a differential digital data path.

Abstract translation: 本申请涉及通过主机设备的USB Type-C连接器（100; 304）在主机设备（400）和外围设备（300）之间传输数据的方法和装置。 描述了一种数据控制器，其具有用于在主机设备的电路和所述USB C型连接器的触点（101）之间建立信号路径的路径控制器（309,310; 706）。 路径控制器可在至少第一和第二模式中操作。 在第一模式中，路径控制器为USB C型连接器的至少第一，第二，第三和第四触点（A6，A7，B6，B7）中的每一个建立单独的信号路径，并且多个建立的信号路径用于 传输模拟音频数据。 在第二模式中，路径控制器仅建立到所述第一至第四触点的子集的一对信号路径，以提供差分数字数据路径。

公开(公告)号：US11768787B2

公开(公告)日：2023-09-26

申请号：US16256162

申请日：2019-01-24

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert David Rand ,  Graeme Gordon Mackay ,  Andrew James Howlett

IPC: G06F13/12 ,  G06F13/38 ,  G06F13/40

CPC classification number: G06F13/385 ,  G06F13/122 ,  G06F13/382 ,  G06F13/4022

Abstract: This application relates to methods and apparatus for transfer of data between a host device (400) and a peripheral device (300) via a USB Type-C connector (100; 304) of the host device. A data controller is described that has a path controller (309, 310; 706) for establishing signal paths between circuitry of the host device and contacts (101) of said USB Type-C connector. The path controller is operable in at least first and second modes. In the first mode the path controller establishes separate signal paths to each of at least first, second, third and fourth contacts (A6, A7, B6, B7) of the USB Type-C connector and a plurality of the established signal paths are for transfer of analogue audio data. In the second mode the path controller establishes a pair of signal paths to only a subset of said first to fourth contacts to provide a differential digital data path.

公开(公告)号：US10997104B2

公开(公告)日：2021-05-04

申请号：US16715922

申请日：2019-12-16

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert David Rand ,  Nigel Burgess

IPC: G06F13/38 ,  G10L19/00 ,  G06F13/40 ,  G06F13/42 ,  H04R3/00 ,  H04R3/12

Abstract: This application relates to transfer of digital audio data between a host device and an accessory apparatus that may be connected to the host device via a suitable connector, such as a USB connector. A path selector is operable to establish either a first digital data path or a second digital data path for transfer of digital data. The first digital data path includes a first data bus host and a general purpose digital data interface suitable for bulk data transfer between the first data bus host and the applications processor of the device. This may be a default USB path. The second digital data path includes a second data bus host and at least one pair of second path data interfaces. The second data bus host does not form part of the applications processor and each of said second path data interfaces comprises a digital audio interface suitable for streaming of audio data. The path selector selectively establishes the first data path for bulk digital data transfer or the second data path for streaming of audio data where latency is important.

公开(公告)号：US10652662B2

公开(公告)日：2020-05-12

申请号：US16233676

申请日：2018-12-27

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert David Rand ,  John Laurance Pennock

IPC: H04R5/02 ,  H04R5/04 ,  H01R13/66 ,  H01R29/00 ,  G06F13/38 ,  H04R1/10

Abstract: Embodiments of the present disclosure relate to methods and apparatus for peripheral device discovery, the detection of orientation of a connector having multiple degrees of rotational symmetry, and the provision of appropriate signal paths between a host device and a peripheral device. Some embodiments provide a characteristic impedance within the peripheral device that is coupled between rotationally symmetric contacts of the connector and thus enables detection of the connector orientation. The value of the characteristic impedance may be used in some embodiments to determine the type or model of peripheral device. Some embodiments are concerned with the enablement of appropriate signal paths to a peripheral device having a transducer (e.g. a loudspeaker) coupled only to rotationally symmetric contacts of the connector, such as headphones implemented in a “balanced” configuration.

公开(公告)号：US11064293B2

公开(公告)日：2021-07-13

申请号：US16667224

申请日：2019-10-29

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Ross Crawford Morgan ,  Robert David Rand ,  Richard Colin Fitzgerald

IPC: H03G3/00 ,  H04R3/00 ,  H03G3/30 ,  G10L21/034

Abstract: There is provided an apparatus for providing an output signal to an audio transducer, comprising: a first signal path for receiving a first digital audio input signal, applying a first digital gain, and outputting an amplified first digital audio input signal; a second signal path, for receiving a second digital audio input signal, applying a second digital gain, and outputting an amplified second digital audio input signal; converter circuitry, coupled to the first and second signal paths, for converting at least the amplified first and second digital audio input signals into the analogue domain, and outputting an analogue audio input signal; and an analogue gain element, for applying an analogue gain to the analogue audio input signal and outputting the output signal. The apparatus further comprises a control circuit, coupled to the first and second signal paths, operative to select the analogue gain based on a combination of at least the first and second digital audio input signals or signals derived therefrom, and to select the first and second digital gains so as to compensate for the analogue gain.

公开(公告)号：US10969871B2

公开(公告)日：2021-04-06

申请号：US16810512

申请日：2020-03-05

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert David Rand ,  Tony Stephen Doy ,  Thomas Ivan Harvey

IPC: G06F3/01 ,  G06F3/16 ,  G06F3/041 ,  G06F3/0488

Abstract: The present disclosure relates to a system for providing substantially synchronised haptic and audio outputs. The system includes a signal processor which is configured to receive an audio signal from a main processor of the system and to receive a haptic signal, which may be received from the main processor, or may be retrieved from memory, or else may be generated in real-time by the signal processor. The signal processor calculates a delay to be applied to the haptic signal or the audio signal and outputs a delayed version of the audio signal and the haptic signal, or a delayed version of the haptic signal and the audio signal, to appropriate output stages.

公开(公告)号：US10528507B2

公开(公告)日：2020-01-07

申请号：US15847183

申请日：2017-12-19

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert David Rand ,  Nigel Burgess

IPC: G06F13/38 ,  G06F3/00 ,  G10L19/00 ,  G06F13/40 ,  G06F13/42 ,  H04R3/00 ,  H04R3/12

Abstract: This application relates to transfer of digital audio data between a host device (200) and an accessory apparatus (101) that may be connected to the host device via a suitable connector (106), such as a USB connector. A path selector (240, 270) is operable to establish either a first digital data path (201) or a second digital data path (202) for transfer of digital data. The first digital data path (201) includes a first data bus host (103) and a general purpose digital data interface (131) suitable for bulk data transfer between the first data bus host and the applications processor (110) of the device. This may be a default USB path. The second digital data path (202) includes a second data bus host (230) and at least one pair of second path data interfaces (140, 141). The second data bus host (230) does not form part of the applications processor and each of said second path data interfaces comprises a digital audio interface suitable for streaming of audio data. The path selector selectively establishes the first data path for bulk digital data transfer or the second data path for streaming of audio data where latency is important.