公开(公告)号：US10455339B2

公开(公告)日：2019-10-22

申请号：US15875175

申请日：2018-01-19

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert David Rand

IPC: H04R29/00 ,  G10L15/22 ,  G10L15/08 ,  G11B20/10 ,  H04R3/00 ,  G08B6/00 ,  G10L25/48 ,  G10L25/78

Abstract: The present disclosure relates to a system for providing an acknowledgement output at an output transducer of a device in response to detection of a trigger signal. The system includes an input transducer, a signal processor, a main processor separate from the signal processor and an output driver. The signal processor monitors an input signal received at the signal processor from the input transducer and outputs an acknowledgement signal to the output driver if the received input signal corresponds to the trigger signal. The signal processor also outputs an interrupt signal to the main processor to cause the main processor to enter an active state. In this way an acknowledge output can rapidly be provided to a user of the system, as there is no need to wait until the main processor has entered its active state and processed the trigger signal.

公开(公告)号：US10187727B2

公开(公告)日：2019-01-22

申请号：US15659276

申请日：2017-07-25

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Robert David Rand ,  John Laurence Pennock

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