公开(公告)号：US09590590B2

公开(公告)日：2017-03-07

申请号：US14537836

申请日：2014-11-10

Applicant: ANALOG DEVICES GLOBAL

Inventor： Hongxing Li ,  Niall Kevin Kearney ,  Keith O'Donoghue

IPC: H03M1/10 ,  H03H11/04 ,  H03M3/00

CPC classification number: H03H11/0422 ,  H03M3/396 ,  H03M3/422 ,  H03M3/438 ,  H03M3/458

Abstract: A dynamically tunable transconductor includes a voltage-to-current converter stage for generating a current signal based on a voltage signal; and a current scaling stage for scaling the current signal by a scaling factor to achieve a particular transconductance. Current scaling stage includes a coarse tune mechanism having an associated coarse tune step and a fine tune mechanism having an associated fine tune step, where the scaling factor is a ratio of the coarse tune step to the fine tune step. A delta-sigma modulator can implement the transconductor to generate loop filter coefficients by dynamically tuning the transconductance to achieve a particular resistance.

Abstract translation: 一种动态可调谐的跨导体包括用于基于电压信号产生电流信号的电压 - 电流转换器级; 以及用于按比例因子缩放当前信号以实现特定跨导的电流缩放级。 当前缩放级包括具有相关联的粗调步骤的粗调机构和具有相关联的微调步骤的微调机构，其中缩放因子是粗调步骤与微调步骤的比率。 Δ-Σ调制器可以通过动态调谐跨导来实现跨导体来产生环路滤波器系数以实现特定的电阻。

公开(公告)号：US09584302B2

公开(公告)日：2017-02-28

申请号：US14732253

申请日：2015-06-05

Applicant: ANALOG DEVICES GLOBAL

Inventor： Mohan Perumal Karthik ,  Sivaramakrishnan Subramanaiam ,  Praveen Krishna

IPC: H04L7/00

CPC classification number: H04L7/0012 ,  H04J3/0664 ,  H04J3/0667 ,  H04L7/0008

Abstract: Existing synchronization methods can be inefficient in hardware-assisted implementations because of the effects of various jittery events. Thus, a method and an apparatus are provided to synchronize a slave device's clock to a master device's clock for a hardware-assisted implementation. The method can include the receipt of three messages. Time differences are determined based on a time extracted from two of the messages and a time of receipt of a different one of the messages. The slave device's clock can be adjusted based on these time differences. Thus, this method, which can include a dynamic weighted average to compute and implement the synchronization, can synchronize the clock of the slave device to the clock of the master device in a faster time interval.

Abstract translation: 由于各种抖动事件的影响，现有的同步方法在硬件辅助实现中可能效率低下。 因此，提供了一种方法和装置，用于将从属设备的时钟与主设备的时钟同步以用于硬件辅助实现。 该方法可以包括接收三条消息。 基于从两个消息中提取的时间和接收到不同消息的时间确定时差。 可以根据这些时间差来调整从设备的时钟。 因此，该方法可以包括用于计算和实现同步的动态加权平均，可以以更快的时间间隔将从设备的时钟同步到主设备的时钟。

公开(公告)号：US09564855B2

公开(公告)日：2017-02-07

申请号：US14618899

申请日：2015-02-10

Applicant: Analog Devices Global

Inventor： Gerard Mora-Puchalt

IPC: H03F1/02 ,  H03F3/45 ,  H03F1/30

CPC classification number: H03F3/2175 ,  H03F1/0205 ,  H03F1/303 ,  H03F3/2171 ,  H03F3/303 ,  H03F3/45179 ,  H03F3/45219 ,  H03F3/45748 ,  H03F3/45775 ,  H03F2200/231 ,  H03F2200/297 ,  H03F2203/45112 ,  H03F2203/45116 ,  H03F2203/45292 ,  H03F2203/45454 ,  H03M1/12

Abstract: Adaptive biasing circuits for input differential pairs of a buffer or an amplifier adapt to autozero currents for discrete pair selection or continuous pair selection. The adaptive biasing circuits include a multistage device including current source and follower devices with a plurality of switches for a two-phase operation: autozero and amplifying phases. During an autozero phase, input differential pairs are isolated from subsequent stages and biasing currents are determined for autozeroing of input offset voltages. During an amplifying phase, both input differential pairs can be coupled to subsequent stages for continuous selection or a selected input differential pair can be coupled to subsequent stages for discrete selection.

Abstract translation: 用于缓冲器或放大器的输入差分对的自适应偏置电路适用于用于离散对选择或连续对选择的自动电流。 自适应偏置电路包括包括具有用于两相操作的多个开关的电流源和从动装置的多级装置：自动调零和放大阶段。 在自动调零阶段，输入差分对与后续阶段隔离，偏置电流被确定为输入偏移电压的自动调零。 在放大阶段期间，两个输入差分对可以耦合到后续级以用于连续选择，或者所选择的输入差分对可耦合到后续级用于离散选择。

公开(公告)号：US20170025594A1

公开(公告)日：2017-01-26

申请号：US14805135

申请日：2015-07-21

Applicant: Analog Devices Global

Inventor： Patrick M. McGUINNESS ,  Helen BERNEY ,  Jane CORNETT ,  William Alan LANE ,  Baoxing CHEN

IPC: H01L35/32 ,  H01L35/18

Abstract: An embodiment of a thermoelectric device may include a plurality of thermoelectric cells disposed between first and second planes. Each of the thermoelectric cells may include a thermoelectric element formed from a thermoelectric material of a single semiconductor type, the thermoelectric element including a first end, a second end, and a portion extending from the first end to the second end, the portion extending from the first end to the second end including at least two surfaces that face each other; and at least one conductive element electrically connected to and extending away from the second end of the thermoelectric element toward the first end of the thermoelectric element of another thermoelectric cell. Each thermoelectric cell also may further include an insulating element disposed between the at least two surfaces of the thermoelectric element and between portions of the at least one conductive element.

Abstract translation: 热电装置的实施例可以包括设置在第一和第二平面之间的多个热电电池。 每个热电池可以包括由单一半导体类型的热电材料形成的热电元件，所述热电元件包括​​第一端，第二端和从第一端延伸到第二端的部分，所述部分从 包括至少两个彼此相对的表面的第二端的第一端; 以及至少一个导电元件，其电连接到所述热电元件的第二端并远离所述热电元件的所述热电元件的第一端。 每个热电池还可以进一步包括设置在热电元件的至少两个表面之间和至少一个导电元件的部分之间的绝缘元件。

公开(公告)号：US20170023506A1

公开(公告)日：2017-01-26

申请号：US15187398

申请日：2016-06-20

Applicant: Analog Devices Global

Inventor： Colin G. Lyden ,  Donal Bourke ,  Dennis A. Dempsey ,  Dermot G. O'Keeffe ,  Patrick C. Kirby

IPC: G01N27/02 ,  G01N27/49 ,  G01N27/327 ,  H03F3/45 ,  H03F1/34

CPC classification number: G01N27/028 ,  G01N27/3273 ,  G01N27/49 ,  H03F1/34 ,  H03F3/45475 ,  H03F2200/261 ,  H03F2200/462 ,  H03L5/00

Abstract: A control circuit for use with a four terminal sensor, the sensor having first and second drive terminals and first and second measurement terminals, the control circuit arranged to drive at least one of the first and second drive terminals with an excitation signal, to sense a voltage difference between the first and second measurement terminals, and control the excitation signal such that the voltage difference between the first and second measurement terminals is within a target range of voltages, and wherein the control circuit includes N poles in its transfer characteristic and N−1 zeros in its transfer characteristic such that when a loop gain falls to unity the phase shift around a closed loop is not substantially 2π radians or a multiple thereof, where N is greater than 1.

Abstract translation: 一种与四端子传感器一起使用的控制电路，所述传感器具有第一和第二驱动端子以及第一和第二测量端子，所述控制电路被布置成用激励信号驱动第一和第二驱动端子中的至少一个，以感测 并且控制所述激励信号，使得所述第一测量端子与所述第二测量端子之间的电压差在目标电压范围内，并且其中所述控制电路在其传输特性中包括N极，并且所述N- 1的零传递特性使得当环路增益下降到1时，围绕闭环的相移基本上不是2π弧度或其倍数，其中N大于1。

公开(公告)号：US09543921B2

公开(公告)日：2017-01-10

申请号：US14724731

申请日：2015-05-28

Applicant: Analog Devices Global

Inventor： Fatih Kocer

IPC: H03H7/25 ,  H03K5/134

CPC classification number: H03H7/25 ,  H03K5/134

Abstract: Apparatus and methods for controlling overshoot in digital step attenuators are disclosed. By configuring a multi-bit DSA such that an attenuation control block changes a plurality of control signals in a manner preventing a series cascade of attenuation units from having a transient attenuation value less than an initial and final value of attenuation, an overshoot condition can be prevented. Control signals transition the attenuation units to a first state of attenuation before they transition attenuation units to a second state of insertion.

Abstract translation: 公开了用于控制数字步进衰减器中的过冲的装置和方法。 通过配置多比特DSA，使得衰减控制块以防止衰减单元的串联级联具有小于衰减的初始和最终值的瞬态衰减值的方式改变多个控制信号，可以将过冲条件 防止了 控制信号在将衰减单元转换到第二插入状态之前将衰减单元转换到第一衰减状态。

公开(公告)号：US09542933B2

公开(公告)日：2017-01-10

申请号：US13789847

申请日：2013-03-08

Applicant: ANALOG DEVICES GLOBAL

Inventor： Mikael Mortensen

IPC: G10L15/04 ,  G10L15/02 ,  G10L15/22 ,  H04R3/00 ,  G10L15/28 ,  G10L15/06 ,  G10L15/08 ,  G10L15/26

CPC classification number: G10L15/28 ,  G10L15/02 ,  G10L15/063 ,  G10L15/08 ,  G10L15/10 ,  G10L15/22 ,  G10L15/265 ,  H04R3/00 ,  H04R2225/43

Abstract: A microphone circuit assembly for an external application processor, such as a programmable Digital Signal Processor, may include a microphone preamplifier and analog-to-digital converter to generate microphone signal samples at a first predetermined sample rate. A speech feature extractor is configured for receipt and processing of predetermined blocks of the microphone signal samples to extract speech feature vectors representing speech features of the microphone signal samples. The microphone circuit assembly may include a speech vocabulary comprising a target word or target phrase of human speech encoded as a set of target feature vectors and a decision circuit is configured to compare the speech feature vectors generated by the speech feature extractor with the target feature vectors to detect the target speech word or phrase.

Abstract translation: 用于外部应用处理器（例如可编程数字信号处理器）的麦克风电路组件可以包括麦克风前置放大器和模数转换器，用于以第一预定采样率产生麦克风信号样本。 语音特征提取器被配置为接收和处理麦克风信号样本的预定块，以提取表示麦克风信号样本的语音特征的语音特征向量。 麦克风电路组件可以包括语音词汇，其包括编码为一组目标特征向量的人类语音的目标词或目标短语，并且判定电路被配置为将由语音特征提取器生成的语音特征向量与目标特征向量 以检测目标语音词或短语。

公开(公告)号：US20170003704A1

公开(公告)日：2017-01-05

申请号：US14789477

申请日：2015-07-01

Applicant: Analog Devices Global

Inventor： Stefan MARINCA

IPC: G05F3/26

CPC classification number: G05F3/267

Abstract: A bias current generators that may be implemented in low power environments is described. The current generator can be implemented without using resistors and may be used to generate reference currents and voltages. It may also be used to generate voltage references where the output of the circuit is to at least a first order temperature independent.

Abstract translation: 描述了可以在低功率环境中实现的偏置电流发生器。 电流发生器可以在不使用电阻的情况下实现，并可用于产生参考电流和电压。 它也可以用于产生电压基准，其中电路的输出至少与第一阶温度无关。

公开(公告)号：US09531433B2

公开(公告)日：2016-12-27

申请号：US14175480

申请日：2014-02-07

Applicant: Analog Devices Global

Inventor： Kim Spetzler Berthelsen ,  Robert Adams ,  Kasper Strange

IPC: H04M9/08 ,  H04B1/38 ,  H04B3/23

CPC classification number: H04B3/23 ,  H04M9/082

Abstract: A feedback cancellation assembly for an electroacoustic communication apparatus may include a signal transmission path for generation and emission of an outgoing sound signal to an external environment through an electrodynamic loudspeaker and a signal reception path comprising a microphone for generation of a microphone input signal corresponding to sound received from the external environment. The signal reception path may generate a digital microphone signal. The outgoing sound signal may be acoustically coupled to the microphone. An electronic feedback cancellation path may be coupled between a tapping node and a summing node to produce a feedback cancellation signal to the summing node.

Abstract translation: 用于电声通信设备的反馈消除组件可以包括用于通过电动扬声器产生和发射到外部环境的输出声音信号的信号传输路径，以及包括用于产生对应于声音的麦克风输入信号的麦克风的信号接收路径 从外部环境收到。 信号接收路径可以产生数字麦克风信号。 输出声音信号可以声学耦合到麦克风。 电子反馈消除路径可以耦合在轻敲节点和求和节点之间以产生到求和节点的反馈消除信号。

公开(公告)号：US09525939B2

公开(公告)日：2016-12-20

申请号：US14511955

申请日：2014-10-10

Applicant: ANALOG DEVICES GLOBAL

Inventor： Kim Spetzler Berthelsen ,  Kasper Strange

IPC: H03G11/00 ,  H04R3/00 ,  H04R29/00 ,  H04R9/06

CPC classification number: H04R3/007 ,  H04R9/06

Abstract: The present invention relates in one aspect to a voice coil temperature protector for electrodynamic loudspeakers. The voice coil temperature protector comprises an audio signal input for receipt of an audio signal supplied by an audio signal source and a probe signal source for generation of a low-frequency probe signal. A signal combiner is configured to combine the audio signal with the low-frequency probe signal to provide a composite loudspeaker drive signal comprising an audio signal component and a probe signal component. The voice coil temperature protector comprises a current detector configured for detecting a level of a probe current component flowing through the voice coil in response to the composite loudspeaker drive signal and a current comparator which is configured to comparing the detected level of the probe current component with a predetermined probe current threshold. The predetermined probe current threshold corresponds to a predetermined voice coil temperature via a known temperature dependency of a voice coil resistance. The voice coil temperature protector further comprises a signal controller configured for attenuating a level of the audio signal in response to the probe current component falls below the predetermined probe current threshold.

Abstract translation: 本发明在一个方面涉及一种用于电动扬声器的音圈温度保护器。 音圈温度保护器包括用于接收由音频信号源提供的音频信号的音频信号输入端和用于产生低频探测信号的探测信号源。 信号组合器被配置为将音频信号与低频探测信号组合以提供包括音频信号分量和探测信号分量的复合扬声器驱动信号。 音圈温度保护器包括电流检测器，其被配置为响应于复合扬声器驱动信号检测流过音圈的探头电流分量的电平;以及电流比较器，其被配置为将探测电流分量的检测电平与 预定的探针电流阈值。 预定的探针电流阈值通过音圈电阻的已知温度依赖性对应于预定的音圈温度。 音圈温度保护器还包括信号控制器，该信号控制器被配置为响应于探头电流分量而降低到低于预定探针电流阈值的音频信号的电平。