公开(公告)号：US20170338126A1

公开(公告)日：2017-11-23

申请号：US15675242

申请日：2017-08-11

申请人： Cirrus Logic, Inc.

发明人： Zhonghai SHI ,  Vince DEEMS ,  Hong TIAN

IPC分类号： H01L21/3205 ,  H01L27/08 ,  H01L21/762 ,  H01L21/763 ,  H01L29/06 ,  H01L49/02

CPC分类号： H01L21/32055 ,  H01L21/76224 ,  H01L21/763 ,  H01L27/0802 ,  H01L28/20 ,  H01L29/0649

摘要： In accordance with embodiments of the present disclosure, an integrated circuit may include at least one region of shallow-trench isolation field oxide, at least one region of dummy diffusion, and a polycrystalline semiconductor resistor. The at least one region of shallow-trench isolation field oxide may be formed on a semiconductor substrate. The at least one region of dummy diffusion may be formed adjacent to the at least one region of shallow-trench isolation field oxide on the semiconductor substrate. The polycrystalline semiconductor resistor may comprise at least one resistor arm formed with a polycrystalline semiconductor material, wherein the at least one resistor arm is formed over each of the at least one region of shallow-trench isolation field oxide and the at least one region of dummy diffusion.

公开(公告)号：US09788094B2

公开(公告)日：2017-10-10

申请号：US15362781

申请日：2016-11-28

申请人： Cirrus Logic, Inc.

发明人： Eric J. Swanson

IPC分类号： H04R1/10 ,  G06F17/30 ,  H04R5/033

CPC分类号： H04R1/1025 ,  G06F17/3074 ,  H04R1/1016 ,  H04R1/1041 ,  H04R5/033 ,  H04R2201/103 ,  H04R2420/07

摘要： A wireless earpiece may include a local memory for storing audio files that can be played back by the user. The wireless earpiece may fit entirely within the user's ear canal. Audio files, for example music files, may be loaded on the wireless earpiece by docking the wireless earpiece with a mobile device, which includes a larger memory storing the user's library of music files. The stored audio files may be received from a mobile device that were automatically selected from a library of music files by the mobile device without intervention from the user. To provide stereo sound, two wireless earpieces may be worn by the user and docked separately with the mobile device. Each of the two wireless earpieces may store a single channel of an audio file, which is separated by the mobile device during synchronization.

公开(公告)号：US09759751B1

公开(公告)日：2017-09-12

申请号：US13740014

申请日：2013-01-11

申请人： Cirrus Logic, Inc.

发明人： Shruti Sethi

IPC分类号： G01R21/06 ,  G01R21/133 ,  G06F17/00

CPC分类号： G01R21/133 ,  G01R23/20 ,  G06F17/00

摘要： In one embodiment, a system and method perform a spectral analysis in a power measurement system to determine the total harmonic distortion (“THD”) in a power signal by correlating one or more THD calculation parameters to a sensed period of a voltage input signal. In at least one embodiment, the one or more THD calculation parameters are a number of samples of a voltage, current, or voltage and current components of the power signal that correlate to the sensed period. Because, for example, the period of the power signal can vary or the clock frequency can drift over time, the power measurement system correlates the number of samples with the period and, thus, varies the count of samples over which THD is calculated when the period varies. By correlating the samples with the period, the samples more closely represent a period of the sampled component of the power signal.

公开(公告)号：US09711130B2

公开(公告)日：2017-07-18

申请号：US15130271

申请日：2016-04-15

申请人： Cirrus Logic, Inc.

发明人： Jon D. Hendrix ,  Gautham Devendra Kamath ,  Nitin Kwatra ,  Ali Abdollahzadeh Milani ,  Jeffrey Alderson

IPC分类号： A61F11/06 ,  G10K11/178 ,  H04R3/00 ,  H04R1/10

CPC分类号： G10K11/178 ,  G10K11/17827 ,  G10K11/17854 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/30232 ,  G10K2210/3026 ,  G10K2210/3028 ,  G10K2210/3051 ,  G10K2210/3055 ,  H04R1/1083 ,  H04R3/005

摘要： A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal that measures the ambient audio and an error microphone signal that measures the output of an output transducer plus any ambient audio at that location and injects the anti-noise signal at the transducer output to cause cancellation of ambient audio sounds. A processing circuit uses the reference and error microphone to generate the anti-noise signal, which can be generated by an adaptive filter operating at a multiple of the ANC coefficient update rate. Downlink audio can be combined with the high data rate anti-noise signal by interpolation. High-pass filters in the control paths reduce DC offset in the ANC circuits, and ANC coefficient adaptation can be halted when downlink audio is not detected.

公开(公告)号：US09698732B2

公开(公告)日：2017-07-04

申请号：US14706656

申请日：2015-05-07

申请人： Cirrus Logic, Inc.

发明人： Siddharth Maru ,  Eric J. King

IPC分类号： H02M3/158 ,  H03F1/08 ,  G05F1/575 ,  H03F3/217 ,  H03F1/02 ,  H03F3/181

CPC分类号： H03F1/083 ,  G05F1/575 ,  H02M3/158 ,  H03F1/0277 ,  H03F3/181 ,  H03F3/217 ,  H03F3/2178 ,  H03F2200/03 ,  H03F2200/372

摘要： A controller may be configured to sequentially apply a plurality of switch configurations of a power converter in order to operate the power converter as a differential output converter to switch a polarity of the output voltage, such that: during a charging phase of the power converter, a power inductor is coupled between one of a first terminal and a second terminal of the power source and one of a first terminal and a second terminal of the output load, during a transfer phase of the power converter, at least one of the plurality of switches is activated in order to couple the power inductor between the second terminal of the power source and one of the first terminal of the output load and the second terminal of the output load, wherein the output voltage is a differential voltage between the first terminal and the second terminal.

公开(公告)号：US20170179895A1

公开(公告)日：2017-06-22

申请号：US15451882

申请日：2017-03-07

申请人： Cirrus Logic, Inc.

发明人： Eric J. King ,  Christophe J. Amadi ,  John L. Melanson

IPC分类号： H03F3/217 ,  H03F3/185

CPC分类号： H03F3/2175 ,  H03F1/0277 ,  H03F1/083 ,  H03F3/181 ,  H03F3/185 ,  H03F3/217 ,  H03F3/2171 ,  H03F3/2173 ,  H03F3/2178 ,  H03F2200/03 ,  H03F2200/231

摘要： A method for producing an output voltage to a load may include, in a power stage comprising power converter having a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, and an output for producing the output voltage comprising a first output terminal and a second output terminal, controlling the linear amplifier to transfer electrical energy from the input source of the power stage to the load in accordance with one or more least significant bits of a digital input signal, and controlling the power converter in accordance with bits of the digital input signal other than the one or more least significant bits to sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from the input source of the power stage to the load.

公开(公告)号：US09654056B2

公开(公告)日：2017-05-16

申请号：US14706680

申请日：2015-05-07

申请人： Cirrus Logic, Inc.

发明人： Christophe J. Amadi ,  Siddharth Maru ,  Eric J. King

IPC分类号： G05F1/575 ,  H03F1/08 ,  H02M3/158 ,  H03F3/217 ,  H03F1/02 ,  H03F3/181

CPC分类号： H03F1/083 ,  G05F1/575 ,  H02M3/158 ,  H03F1/0277 ,  H03F3/181 ,  H03F3/217 ,  H03F3/2178 ,  H03F2200/03 ,  H03F2200/372

摘要： A power converter may include a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, an output for producing the output voltage, wherein a first switch is coupled to a first output terminal of the output and a second switch is coupled to a second output terminal of the output, and a linear amplifier coupled to the output. The controller may be configured to, in a linear amplifier mode of the power stage, enable the linear amplifier to transfer electrical energy from an input source of the power stage to the load, and in at least one mode of the power stage other than the linear amplifier mode, sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer the electrical energy from the input source to the load.

公开(公告)号：US09646595B2

公开(公告)日：2017-05-09

申请号：US14564611

申请日：2014-12-09

申请人： Cirrus Logic, Inc.

发明人： Ali Abdollahzadeh Milani ,  Gautham Devendra Kamath

IPC分类号： G10K11/16 ,  G10K11/175 ,  G10K11/178

CPC分类号： G10K11/175 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/3039 ,  G10K2210/3055 ,  G10K2210/503

摘要： A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit determines a degree of coupling between the user's ear and the transducer and adjusts the adaptive cancellation of the ambient sounds to prevent erroneous and possibly disruptive generation of the anti-noise signal if the degree of coupling lies either below or above a range of normal operating ear contact pressure.

公开(公告)号：US09613622B1

公开(公告)日：2017-04-04

申请号：US14324286

申请日：2014-07-07

申请人： Cirrus Logic, Inc.

发明人： John L. Melanson

IPC分类号： H03G3/20 ,  G10L15/20

CPC分类号： G10L15/20 ,  H03G3/32 ,  H03G9/005 ,  H03G9/025

摘要： A personal audio device that detects speech provides for improved interaction with others. When speech is detected in a microphone output signal of a microphone that measures ambient audio sounds, the audio program being reproduced by the personal audio device may be altered, by attenuating, muting or interrupting the program material. The speech may be provided to a headset that reproduces the program material. The direction of the speech can be used to determine whether the speech is from a person other than the use of the personal audio device.

公开(公告)号：US09609416B2

公开(公告)日：2017-03-28

申请号：US14299836

申请日：2014-06-09

申请人： Cirrus Logic, Inc.

发明人： Roy Scott Kaller ,  Aaron Brennan

IPC分类号： H04R1/10 ,  G08G1/0967

CPC分类号： H04R1/1041 ,  G08G1/096791 ,  H04R1/1083

摘要： An optical sensor may be integrated into headphones and feedback from the sensor used to adjust an audio output from the headphones. For example, an emergency vehicle traffic preemption signal may be detected by the optical sensor. Optical signals may be processed in a pattern discriminator, which may be integrated with an audio controller integrated circuit (IC). When the signal is detected, the playback of music through the headphones may be muted and/or a noise cancellation function turned off. The optical sensor may be integrated in a music player, a smart phone, a tablet, a cord-mounted module, or the earpieces of the headphones.