公开(公告)号：US20190199215A1

公开(公告)日：2019-06-27

申请号：US16226454

申请日：2018-12-19

申请人： Cirrus Logic International Semiconductor Ltd.

发明人： Xin Zhao ,  John L. Melanson ,  Eric King ,  Xiaofan Fei

IPC分类号： H02M3/158 ,  H02M3/157 ,  G05F1/62

CPC分类号： H02M3/1582 ,  G05F1/62 ,  H02M3/157

摘要： The overall performance of single input multiple output (SIMO) switching DC-DC power converters may be improved by controlling power and output switches to adjust inductor current delivered to one output while maintaining substantially constant the current delivered to other outputs, thereby reducing cross regulation interference across outputs. Power converter systems of this disclosure may be configured to calculate an inductor current value and a duty cycle value based on voltages at each of the voltage outputs. The power converter systems may be configured to control at least one main power switch to increase or decrease the current in the inductor based on the calculated inductor current value. Additionally, the power converter systems may be configured to control at least one output power switch to divert current from the inductor to one of the plurality of output nodes based on the calculated duty cycle value.

公开(公告)号：US10249283B2

公开(公告)日：2019-04-02

申请号：US15669647

申请日：2017-08-04

申请人： Cirrus Logic International Semiconductor Ltd.

发明人： Dayong Zhou ,  Yang Lu ,  Jeffrey D. Alderson ,  Eric King

IPC分类号： H04R3/04 ,  G10K11/178 ,  G10L25/21 ,  G10L25/51

摘要： The handling of disturbances to audio signals may be improved with an adaptive noise cancellation (ANC) system that performs tone suppression and howl suppression in a collaborative manner. Such ANC systems may be configured to detect a first tone in an input signal at a first tone frequency and extract the detected first tone from the input signal. The ANC systems may also be configured to adaptively filter the extracted first tone to generate a second tone that has a magnitude that is approximately equal to a magnitude of the extracted first tone and a phase that is approximately opposite the phase of the extracted first tone. The ANC systems may be further configured to add the second tone to an intermediate signal that is based, at least in part, on the input signal to generate the output signal.

公开(公告)号：US20190043467A1

公开(公告)日：2019-02-07

申请号：US15669647

申请日：2017-08-04

申请人： Cirrus Logic International Semiconductor Ltd.

发明人： Dayong Zhou ,  Yang Lu ,  Jeffrey D. Alderson ,  Eric King

IPC分类号： G10K11/178 ,  G10L25/21 ,  G10L25/51 ,  H04R3/04

摘要： The handling of disturbances to audio signals may be improved with an adaptive noise cancellation (ANC) system that performs tone suppression and howl suppression in a collaborative manner. Such ANC systems may be configured to detect a first tone in an input signal at a first tone frequency and extract the detected first tone from the input signal. The ANC systems may also be configured to adaptively filter the extracted first tone to generate a second tone that has a magnitude that is approximately equal to a magnitude of the extracted first tone and a phase that is approximately opposite the phase of the extracted first tone. The ANC systems may be further configured to add the second tone to an intermediate signal that is based, at least in part, on the input signal to generate the output signal.