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公开(公告)号：US20190028128A1
公开(公告)日：2019-01-24
申请号：US16137268
申请日：2018-09-20
Applicant: Maxlinear, Inc.
Abstract: Methods and systems for crest factor reduction may comprise generating an original waveform, generating a distortion signal by reducing a crest factor of the original waveform, generating an error signal by subtracting out the original waveform from the distortion signal, and generating a conditioned waveform by adding the error signal to the original waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The crest factor of the original waveform may be reduced using a limiter. The power amplifier may comprise a programmable gain amplifier (PGA). The distortion signal may be generated based on a PGA model and/or a predistortion model. A signal from an output of the PA may be fed back to the PGA model. The PGA model may be dynamically configured. The crest factor of the original waveform may be reduced in an analog domain and/or a digital domain.
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公开(公告)号：US20180191452A1
公开(公告)日：2018-07-05
申请号：US15907404
申请日：2018-02-28
Applicant: Maxlinear, Inc.
Inventor： Glenn Chang , Raja Pullela , Madhukar Reddy , Timothy Gallagher , Shantha Murthy Prem Swaroop , Curtis Ling , Vamsi Paidi , Wenjian Chen
CPC classification number: H04H40/90 , H04N21/6143
Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
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公开(公告)号：US09692435B2
公开(公告)日：2017-06-27
申请号：US15130636
申请日：2016-04-15
Applicant: MaxLinear, Inc.
Inventor： Gaurav Chandra , Tao Zeng , Shantha Murthy Prem Swaroop , Jianyu Zhu
CPC classification number: H03M1/1023 , H03M1/0607 , H03M1/68
Abstract: Systems and methods are provided for digital-to-analog converter (DAC) with digital offsets. A digital offset may be applied to an input of a digital-to-analog converter (DAC), and digital-to-analog conversions are then applied via the DAC to the input with the digital offset. The digital offset is set to account for one or more conditions relating to inputs to the DAC, with the one or more conditions affect switching characteristics of one or more of a plurality of conversion elements in the DAC, and where each conversion element handles a particular bit in inputs to the DAC. The digital offset may be determined dynamically and adaptively, such as based on the input and/or conditions relating to the input. Alternatively, the digital offset may be pre-determined and fixed. One or more adjustments may be selectively applied to the digital offset for particular input conditions.
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公开(公告)号：US20160248458A1
公开(公告)日：2016-08-25
申请号：US15140599
申请日：2016-04-28
Applicant: Maxlinear, Inc.
CPC classification number: H04B1/0475 , H03F1/02 , H03F1/3241 , H03F1/3247 , H03F3/195 , H03F3/213 , H03F3/24 , H03F2200/451 , H03F2201/3215 , H03G3/3042 , H04B2001/0425 , H04B2001/045
Abstract: Methods and systems for crest factor reduction may comprise generating an original waveform to be amplified by a programmable gain amplifier (PGA); generating a distortion signal utilizing a PGA model that predicts an output signal of the PGA based on the original waveform; generating an error signal by subtracting out the original waveform from the distortion signal; filtering the generated error signal; generating a conditioned waveform with crest factor reduced from that of the original waveform by adding the filtered error signal to the original waveform; and amplifying the conditioned waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The generating of the conditioned waveform may be iterated. The distortion signal may be generated based on a predistortion model. A signal may be fed back from an output of the PGA to the predistortion model, which may be dynamically configured.
Abstract translation: 用于波峰因数降低的方法和系统可以包括产生要由可编程增益放大器（PGA）放大的原始波形; 使用预测基于原始波形的PGA的输出信号的PGA模型产生失真信号; 通过从失真信号中减去原始波形来产生误差信号; 过滤产生的误差信号; 通过将滤波后的误差信号加到原始波形，产生波形因数从原始波形的峰值因数减小的条件波形; 并放大调节波形。 可以基于光谱掩模要求来减小原始波形的波峰因数。 可以重复生成条件波形。 可以基于预失真模型来生成失真信号。 信号可以从PGA的输出反馈到预失真模型，该预失真模型可以被动态配置。
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公开(公告)号：US20240356445A1
公开(公告)日：2024-10-24
申请号：US18762569
申请日：2024-07-02
Applicant: MaxLinear, Inc.
Inventor： Curtis Ling , Shantha Murthy Prem Swaroop , Vinit Jayaraj
CPC classification number: H02M3/1584 , H02M3/156 , H02M3/1586 , H03M1/143
Abstract: Methods and systems for ripple suppression in multi-phase buck converters may comprise a buck converter for providing an output voltage with controlled ripple current. The buck converter may include one or more main buck converter stages and one or more suppression buck converter stages coupled with the one or more main buck converter stages. The one or more suppression buck converter stages may provide suppression currents to reduce ripple currents generated in the one or main buck converter stages.
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Patent Agency Ranking
公开(公告)号：US10211936B2
公开(公告)日：2019-02-19
申请号：US15907404
申请日：2018-02-28
Applicant: Maxlinear, Inc.
Inventor： Glenn Chang , Raja Pullela , Madhukar Reddy , Timothy Gallagher , Shantha Murthy Prem Swaroop , Curtis Ling , Vamsi Paidi , Wenjian Chen
Abstract: A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.
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公开(公告)号：US10084494B2
公开(公告)日：2018-09-25
申请号：US15646773
申请日：2017-07-11
Applicant: Maxlinear, Inc.
CPC classification number: H04B1/0475 , H03F1/02 , H03F1/3241 , H03F1/3247 , H03F3/195 , H03F3/213 , H03F3/24 , H03F2200/451 , H03F2201/3215 , H03G3/3042 , H04B2001/0425 , H04B2001/045
Abstract: Methods and systems for crest factor reduction may comprise generating an original waveform, generating a distortion signal by reducing a crest factor of the original waveform, generating an error signal by subtracting out the original waveform from the distortion signal, and generating a conditioned waveform by adding the error signal to the original waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The crest factor of the original waveform may be reduced using a limiter. The power amplifier may comprise a programmable gain amplifier (PGA). The distortion signal may be generated based on a PGA model and/or a predistortion model. A signal from an output of the PA may be fed back to the PGA model. The PGA model may be dynamically configured. The crest factor of the original waveform may be reduced in an analog domain and/or a digital domain.
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28.发明申请公开(公告)号：US20180226980A1
公开(公告)日：2018-08-09
申请号：US15949395
申请日：2018-04-10
Applicant: MaxLinear, Inc.
Inventor： Gaurav Chandra , Tao Zeng , Shantha Murthy Prem Swaroop
CPC classification number: H03M1/066 , H03M1/1038 , H03M1/66
Abstract: Systems and methods are provided for managing dynamic element matching (DEM) in digital-to-analog converters (DACs). One or more parameters associated with the DAC and/or a signal being converted via the DAC; and based on the one or more parameters, conditions affecting dynamic element matching in the DAC may be assessed. Based on the assessing of the conditions, one or more adjustments may be determined and dynamically applied to the dynamic element matching in the DAC.
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公开(公告)号：US09991899B2
公开(公告)日：2018-06-05
申请号：US15790343
申请日：2017-10-23
Applicant: MaxLinear, Inc.
Inventor： Gaurav Chandra , Tao Zeng , Shantha Murthy Prem Swaroop , Jianyu Zhu
CPC classification number: H03M1/0624 , H03M1/66
Abstract: Systems and methods are provided for adaptive configuration and control of digital-to-analog converters (DACs). Performance of a plurality of conversion elements in a digital-to-analog converter (DAC) may be assessed based on particular input conditions associated with a digital input to the DAC, and the DAC may be configured based on the assessing of performance. Each conversion element of the plurality of conversion elements handles a particular bit in the digital input. The configuring may comprise selecting a subset of the plurality of conversion elements, and setting only the subset of the plurality of conversion elements to apply a particular type of operations. The particular type of operations pertains to applying digital-to-analog conversions via the DAC, and the particular type of operations relates to or affects performance. The particular input conditions may comprise signal backoff.
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公开(公告)号：US09800254B2
公开(公告)日：2017-10-24
申请号：US15130602
申请日：2016-04-15
Applicant: MaxLinear, Inc.
Inventor： Gaurav Chandra , Tao Zeng , Shantha Murthy Prem Swaroop , Jianyu Zhu
CPC classification number: H03M1/0624 , H03M1/66
Abstract: Systems and methods are provided for digital-to-analog converter (DAC) with partial constant switching. A digital-to-analog converter (DAC) comprising a plurality of conversion elements may be configured to apply constant switching in only some of the conversion elements. Only conversion elements applying constant switching may incorporate circuitry for providing such the constant switching. Alternatively, each conversion element may incorporate constant switching circuitry and functionality, and the constant switching may then be turned on or off for each conversion element adaptively, such as based on input conditions.
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