公开(公告)号：US10367515B2

公开(公告)日：2019-07-30

申请号：US16217348

申请日：2018-12-12

Applicant: Maxlinear, Inc.

Inventor： Gaurav Chandra ,  Tao Zeng ,  Shantha Murthy Prem Swaroop ,  Jianyu Zhu

IPC: H03M1/06 ,  H03M1/66

Abstract: A digital-to-analog converter (DAC) controller system may be configured for controlling switching in an associated digital-to-analog converter (DAC), based on a plurality of system inputs that include at least a first system input corresponding to an input applied to the DAC for controlling switching therein, and a second system input that includes a reference control signal. The DAC controller system may include a logic gate circuit that generates a gate output based on two gate inputs that include the first system input and an input set based on the second system input; and a plurality of timing circuits that generate timing outputs for controlling timing of switching in the DAC, which include at least one timing circuit that generates a timing output based on the gate output, with the timing output configured for application in conjunction with and for adjusting a timing output of another timing circuit.

公开(公告)号：US10097195B2

公开(公告)日：2018-10-09

申请号：US15700383

申请日：2017-09-11

Applicant: MaxLinear, Inc.

Inventor： Gaurav Chandra ,  Tao Zeng ,  Shantha Murthy Prem Swaroop

IPC: H03M1/48 ,  H03M1/06 ,  H03M1/10 ,  H03M1/66

Abstract: Systems and methods are provided for digital-to-analog converters (DACs) with enhanced dynamic element matching (DEM) and calibration. DEM may be adapted based on assessment of one or more conditions that may affect the DACs or DEM functions thereof. The one or more condition may comprise amount of signal backoff. The adaption may comprise switching the DEM function (as a whole, or partially—e.g., individual DEM elements) on or off based on the assess conditions. The DACs may incorporate use of calibration. The DEM and/or the calibration may be applied to only a portion of the DAC, such as a particular segment (e.g., a middle segment comprising bits between the MSBs and the LSBs).

公开(公告)号：US20180097524A1

公开(公告)日：2018-04-05

申请号：US15700383

申请日：2017-09-11

Applicant: MaxLinear, Inc.

Inventor： Gaurav Chandra ,  Tao Zeng ,  Shantha Murthy Prem Swaroop

IPC: H03M1/06 ,  H03M1/10 ,  H03M1/66

CPC classification number: H03M1/066 ,  H03M1/1038 ,  H03M1/66

Abstract: Systems and methods are provided for digital-to-analog converters (DACs) with enhanced dynamic element matching (DEM) and calibration. DEM may be adapted based on assessment of one or more conditions that may affect the DACs or DEM functions thereof. The one or more condition may comprise amount of signal backoff. The adaption may comprise switching the DEM function (as a whole, or partially—e.g., individual DEM elements) on or off based on the assess conditions. The DACs may incorporate use of calibration. The DEM and/or the calibration may be applied to only a portion of the DAC, such as a particular segment (e.g., a middle segment comprising bits between the MSBs and the LSBs).

公开(公告)号：US20180062663A1

公开(公告)日：2018-03-01

申请号：US15790343

申请日：2017-10-23

Applicant: MaxLinear, Inc.

Inventor： Gaurav Chandra ,  Tao Zeng ,  Shantha Murthy Prem Swaroop ,  Jianyu Zhu

IPC: H03M1/06 ,  H03M1/66

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.

公开(公告)号：US20160308546A1

公开(公告)日：2016-10-20

申请号：US15130602

申请日：2016-04-15

Applicant: MaxLinear, Inc.

Inventor： Gaurav Chandra ,  Tao Zeng ,  Shantha Murthy Prem Swaroop ,  Jianyu Zhu

IPC: H03M1/10 ,  H03M1/66

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.

Abstract translation: 为具有局部恒定切换的数模转换器（DAC）提供了系统和方法。 包括多个转换元件的数模转换器（DAC）可以被配置为仅在一些转换元件中应用恒定切换。 仅使用恒定切换的转换元件可以包括用于提供这种恒定切换的电路。 或者，每个转换元件可以包括恒定的切换电路和功能，并且然后可以针对每个转换元件自适应地导通或关闭恒定切换，例如基于输入条件。

公开(公告)号：US10224946B2

公开(公告)日：2019-03-05

申请号：US15949395

申请日：2018-04-10

Applicant: MaxLinear, Inc.

Inventor： Gaurav Chandra ,  Tao Zeng ,  Shantha Murthy Prem Swaroop

IPC: H03M1/06 ,  H03M1/10 ,  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.

公开(公告)号：US20190044524A1

公开(公告)日：2019-02-07

申请号：US16155482

申请日：2018-10-09

Applicant: MaxLinear, Inc.

Inventor： Gaurav Chandra ,  Tao Zeng ,  Shantha Murthy Prem Swaroop

IPC: H03M1/06 ,  H03M1/10

Abstract: In a digital-to-analog converter (DAC) that includes one or more conversion circuits, with each conversion circuit configured to handle one or more bits in an input signal to the DAC, one or more types of errors that occur during operation of the DAC may be detected, and one or more adjustments may be determined for correcting the one or more types of errors that occur during operation of the DAC and/or for reducing effects resulting from the one or more types of errors. At least one of the one or more adjustments may applied, with the at least one of the one or more adjustments is applied to only a subset of one or more conversion circuits. The DAC may be adaptive switched among a plurality of modes, and adjustments may be applied only in one or more of the modes but not in all of the modes.

公开(公告)号：US20170359080A1

公开(公告)日：2017-12-14

申请号：US15633157

申请日：2017-06-26

Applicant: MaxLinear, Inc.

Inventor： Gaurav Chandra ,  Tao Zeng ,  Shantha Murthy Prem Swaroop ,  Jianyu Zhu

IPC: H03M1/10 ,  H03M1/06 ,  H03M1/68

CPC classification number: H03M1/1023 ,  H03M1/0607 ,  H03M1/68

Abstract: Systems and methods are provided for digital-to-analog conversions with adaptive digital offsets. A digital offset may be determined and applied to a digital input to a digital-to-analog converter (DAC), and digital-to-analog conversions are then applied via the DAC to the digital input with the digital offset. The digital offset may be set to account for one or more conditions relating to inputs to the DAC, with the one or more conditions affecting switching characteristics of one or more of a plurality of conversion elements in the DAC. The digital offset may be determined dynamically and adaptively, such as based on the input and/or conditions relating to the input. The adjustments may be selectively applied to the digital offset for particular input conditions.

公开(公告)号：US09705541B2

公开(公告)日：2017-07-11

申请号：US15140599

申请日：2016-04-28

Applicant: Maxlinear, Inc.

Inventor： Ramesh Sridhar ,  Timothy Gallagher ,  Shantha Murthy Prem Swaroop ,  Ali Shahed Hagh Gadam

IPC: H04L25/03 ,  H04B1/04 ,  H03G3/30 ,  H03F1/32 ,  H03F3/195 ,  H03F3/24 ,  H03F3/213

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.

公开(公告)号：US20160308545A1

公开(公告)日：2016-10-20

申请号：US15130617

申请日：2016-04-15

Applicant: MaxLinear, Inc.

Inventor： Gaurav Chandra ,  Tao Zeng ,  Shantha Murthy Prem Swaroop

IPC: H03M1/06 ,  H03M1/68 ,  H03M1/10

CPC classification number: H03M1/066 ,  H03M1/1038 ,  H03M1/66

Abstract: Systems and methods are provided for digital-to-analog converters (DACs) with enhanced dynamic element matching (DEM) and calibration. DEM may be adapted based on assessment of one or more conditions that may affect the DACs or DEM functions thereof. The one or more condition may comprise amount of signal backoff. The adaption may comprise switching the DEM function (as a whole, or partially—e.g., individual DEM elements) on or off based on the assess conditions. The DACs may incorporate use of calibration. The DEM and/or the calibration may be applied to only a portion of the DAC, such as a particular segment (e.g., a middle segment comprising bits between the MSBs and the LSBs).

Abstract translation: 为具有增强的动态元素匹配（DEM）和校准的数模转换器（DAC）提供了系统和方法。 可以基于可能影响DAC或其DEM功能的一个或多个条件的评估来调整DEM。 一个或多个条件可以包括信号回退量。 适应可以包括基于评估条件来打开或关闭DEM功能（整体上，或部分地，例如，单独的DEM元件）。 DAC可以使用校准。 DEM和/或校准可以仅应用于DAC的一部分，例如特定段（例如，包括MSB和LSB之间的位的中间段）。