公开(公告)号：WO2011010142A3

公开(公告)日：2011-01-27

申请号：PCT/GB2010/051189

申请日：2010-07-20

Applicant: WOLFSON MICROELECTRONICS PLC ,  NOTMAN, Andrew ,  MCCLOY-STEVENS, Mark

Inventor： NOTMAN, Andrew ,  MCCLOY-STEVENS, Mark

IPC: H02M3/158

Abstract: There is provided a level-shift circuit, comprising: an input, for receiving a first voltage; an output, for outputting a second voltage; a resistor array comprising one or more resistors connected in series to the input; a current sink for providing a current that is independent of the first voltage; a switch arrangement comprising a plurality of switch connections for establishing a selected one from a plurality of force paths between the current sink and the input, said selected force path comprising a selected number of said one or more resistors of said resistor array; and at least one connection between the output and the resistor array that provides a sense path between the resistor array and the output that does not comprise any of said switch connections used to establish each of said plurality of force paths.

公开(公告)号：WO2011010133A1

公开(公告)日：2011-01-27

申请号：PCT/GB2010/051179

申请日：2010-07-20

Applicant: WOLFSON MICROELECTRONICS PLC ,  HATFIELD, Robert

Inventor： HATFIELD, Robert

IPC: H04M1/60 ,  H04S1/00

CPC classification number: H04M1/6025 ,  H04M1/72558

Abstract: An integrated circuit (39) for transferring audio signals between audio transducers and circuits that supply or receive digital audio signals, suitable for use for example in a portable, battery powered telecommunications device such as a mobile telephone, smartphone or portable digital assistant with telephone capability, comprises at least two sets of interface connectors (40a, 40b, 40c) for connecting to digital audio buses or links (38a, 38b, 38c) for communicating digital audio signals with the external circuits (31, 33, 37), and at least one digital audio interface circuit (43, 45) for converting the audio signals between the format used by the data link (38a, 38b, 38c) and the format used within the integrated circuit (39) (such as conversion between serial and parallel and multiplexing/demultiplexing multiple data channels that are time division multiplexed onto the data link). A routing system (74) is connected between the interface connectors (40a, 40b, 40c) and the digital audio interface circuit or circuits (43, 45). The routing system (74) is operable to route signals passing through a first set of interface connectors 40b so as to pass through a first digital audio interface circuit (45) and is operable to route signals passing through a second set of interface connectors (40c) so as to pass through the first digital audio interface circuit (45) or alternatively is operable to route signals passing through the second set of interface connectors (40c) so as to pass through the first set of interface connectors 40b without passing through any digital audio interface circuit as the signals pass between the first and second sets of interface connectors (40b, 40c), or alternatively is operable to perform both routings.

Abstract translation: 一种用于在音频换能器和提供或接收数字音频信号的电路之间传送音频信号的集成电路（39），其适用于例如便携式电池供电的电信设备，例如具有电话能力的移动电话，智能电话或便携式数字助理 包括用于连接数字音频总线或链接（38a，38b，38c）的至少两组接口连接器（40a，40b，40c），用于与外部电路（31,33,37）通信数字音频信号，并且在 用于在数据链路（38a，38b，38c）使用的格式和集成电路（39）内使用的格式之间转换音频信号的至少一个数字音频接口电路（43,44）（例如串行和并行之间的转换 并且将时分复用到数据链路的多个数据信道复用/解复用）。 路由系统（74）连接在接口连接器（40a，40b，40c）和数字音频接口电路（43,45）之间。 路由系统（74）可操作地路由通过第一组接口连接器40b的信号，以便通过第一数字音频接口电路（45），并且可操作地路由通过第二组接口连接器（40c）的信号 ），以便通过第一数字音频接口电路（45），或者可操作地路由通过第二组接口连接器（40c）的信号，以便通过第一组接口连接器40b而不通过任何数字 音频接口电路作为信号通过第一和第二组接口连接器（40b，40c）之间，或者可操作地执行两个路由。

公开(公告)号：WO2010094966A2

公开(公告)日：2010-08-26

申请号：PCT/GB2010/050277

申请日：2010-02-18

Applicant: WOLFSON MICROELECTRONICS PLC ,  AL-NAIMI, Khaldoon Taha ,  DOBSON, Robert

Inventor： AL-NAIMI, Khaldoon Taha ,  DOBSON, Robert

IPC: G10K11/178

CPC classification number: G10K11/178 ,  G10K2210/108 ,  G10K2210/3213 ,  G10L21/0232 ,  H03G3/32

Abstract: A noise cancellation signal is generated based on detected ambient noise, such that the noise cancellation signal and a wanted sound signal can be applied to a speaker. Gain control is applied to the wanted sound signal based on a comparison between the detected ambient noise level and the wanted sound signal level, for example such that the level of the wanted sound signal after the gain has been applied exceeds the level of a detected ambient noise signal by a certain threshold. Steps may also be taken such that the total level of the wanted sound signal after the gain has been applied and of the detected ambient noise signal do not exceed a second threshold, to avoid saturating the speaker to which they are applied.

Abstract translation: 基于检测到的环境噪声产生噪声消除信号，使得可以将噪声消除信号和有用声音信号应用于扬声器。 基于检测到的环境噪声电平和所需声音信号电平之间的比较，将增益控制应用于所需声音信号，例如使得增益之后的所需声音信号的电平超过检测到的环境的电平 噪声信号达到一定阈值。 还可以采取步骤，使得已经应用增益之后的有用声音信号的总电平和检测到的环境噪声信号的总电平不超过第二阈值，以避免使其所应用的扬声器饱和。

公开(公告)号：WO2009136196A3

公开(公告)日：2010-06-24

申请号：PCT/GB2009050473

申请日：2009-05-07

Applicant: WOLFSON MICROELECTRONICS PLC ,  MCMULLEN ROBERT ERROL ,  LAMING RICHARD IAN ,  TRAYNOR ANTHONY BERNARD ,  HOEKSTRA TSJERK HANS

Inventor： MCMULLEN ROBERT ERROL ,  LAMING RICHARD IAN ,  TRAYNOR ANTHONY BERNARD ,  HOEKSTRA TSJERK HANS

IPC: B06B1/02

CPC classification number: B06B1/0292

Abstract: A MEMS device comprises a substrate having at least a first transducer optimized for transmitting pressure waves, and at least a second transducer optimized for detecting pressure waves. The transducers can be optimised for transmitting or receiving by varying the diameter, thickness or mass of the membrane and/or electrode of each respective transducer. Various embodiments are described showing arrays of transducers, with different configurations of transmitting and receiving transducers. Embodiments are also disclosed having an array of transmitting transducers and an array of receiving transducers, wherein elements in the array of transmitting and /or receiving transducers are arranged to have different resonant frequencies. At least one of said first and second transducers may comprise an internal cavity that is sealed from the outside of the transducer.

Abstract translation: MEMS器件包括具有至少第一传感器的衬底，该第一传感器优化用于传送压力波，以及至少第二传感器，其优化用于检测压力波。 可以通过改变每个相应换能器的膜和/或电极的直径，厚度或质量来优化传感器的传播或接收。 描述了各种实施例，其示出了具有不同配置的发射和接收换能器的换能器阵列。 还公开了具有发射换能器阵列和接收换能器阵列的实施例，其中发射和/或接收换能器阵列中的元件布置成具有不同的谐振频率。 所述第一和第二换能器中的至少一个可以包括从换能器的外部密封的内部空腔。

公开(公告)号：WO2010055347A1

公开(公告)日：2010-05-20

申请号：PCT/GB2009/051531

申请日：2009-11-13

Applicant: WOLFSON MICROELECTRONICS PLC ,  BROWN, Niall ,  MORE, Grant, M. ,  MALCOLM, Grant, Fraser ,  ROBINSON, Michael ,  DEAS, James, Thomas ,  FRITH, Peter, John

Inventor： BROWN, Niall ,  MORE, Grant, M. ,  MALCOLM, Grant, Fraser ,  ROBINSON, Michael ,  DEAS, James, Thomas ,  FRITH, Peter, John

IPC: G06F13/36 ,  G06F3/16

CPC classification number: G06F3/162

Abstract: An audio device is provided that is arranged for communication of data and signalling with a controller, signalling from the device to the controller being made in discrete time slots, the device comprising: a plurality of nodes, each assigned a priority value and each having one or more unsolicited response sources capable of generating an unsolicited response for transmission to the controller, wherein unsolicited responses generated from a particular node are assigned the priority value of that node; and unsolicited response management means operable to hold unsolicited responses generated by the plurality of nodes that are awaiting transmission to the controller, wherein when two or more unsolicited responses are awaiting transmission to the controller in the unsolicited response management means, the device is arranged to transmit the unsolicited response with the highest assigned priority value first, in the next free time slot.

Abstract translation: 提供了一种音频设备，其被布置为用于与控制器通信数据和信令，从设备到控制器的信令在离散时隙中进行，该设备包括：多个节点，每个节点分配优先级值，并且每个节点具有一个优先级值 或更多的非请求响应源，其能够产生用于传输到控制器的非请求响应，其中从特定节点产生的非请求响应被分配该节点的优先级值; 以及主动响应管理装置，其可操作以保持由等待传输到控制器的多个节点产生的非请求响应，其中当两个或多个未经请求的响应等待在主动请求响应管理装置中传送到控制器时，该装置被安排为发送 在下一个空闲时隙中首先将具有最高分配优先级值的未经请求的响应。

公开(公告)号：WO2007107736A3

公开(公告)日：2009-09-11

申请号：PCT/GB2007000972

申请日：2007-03-20

Applicant: WOLFSON MICROELECTRONICS PLC ,  LAMING RICHARD IAN ,  BEGBIE MARK ,  TRAYNOR ANTHONY

Inventor： LAMING RICHARD IAN ,  BEGBIE MARK ,  TRAYNOR ANTHONY

IPC: B81C1/00

CPC classification number: B81C1/00158 ,  B81B2201/0257 ,  B81B2203/0127 ,  B81C99/004 ,  B81C2201/0109 ,  H04R7/10 ,  H04R7/18 ,  H04R19/005 ,  H04R2307/207 ,  Y10S977/733

Abstract: A MEMS device, for example a capacitive microphone, comprises a flexible membrane (11) that is free to move in response to pressure differences generated by sound waves. A first electrode (13) is mechanically coupled to the flexible membrane (11), and together form a first capacitive plate of the capacitive microphone device. A second electrode (23) is mechanically coupled to a generally rigid structural layer or back-plate (14), which together form a second capacitive plate of the capacitive microphone device. The capacitive microphone is formed on a substrate (1), for example a silicon wafer. A back- volume (33) is provided below the membrane (11), and is formed using a 'back-etch' through the substrate (1). A first cavity (9) is located directly below the membrane (11), and is formed using a first sacrificial layer during the fabrication process. Interposed between the first and second electrodes (13 and 23) is a second cavity (17), which is formed using a second sacrificial layer during the fabrication process. A plurality of bleed holes (15) connect the first cavity (9) and the second cavity (17). Acoustic holes (31) are arranged in the back-plate (14) so as to allow free movement of air molecules, such that the sound waves can enter the second cavity (17). The first and second cavities (9 and 17) in association with the back-volume (33) allow the membrane (11) to move in response to the sound waves entering via the acoustic holes (31) in the back-plate (14). The provision of first and second sacrifjciaj layers has the advantage of protecting the membrane during manufacture, and disassociating the back etch process from the definition of the membrane. The bleed holes (15) aid with the removal of the first and second sacrificial layers. The bleed holes (15) also contribute to the operating characteristics of the microphone.

Abstract translation: MEMS器件，例如电容式麦克风，包括响应于由声波产生的压力差而自由移动的柔性膜（11）。 第一电极（13）机械耦合到柔性膜（11），并且一起形成电容式麦克风装置的第一电容板。 第二电极（23）机械地联接到大致刚性的结构层或背板（14），它们一起形成电容式麦克风装置的第二电容板。 电容式麦克风形成在基板（1）上，例如硅晶片上。 背部容积（33）设置在膜（11）下方，并且通过基板（1）的“背蚀刻”形成。 第一腔（9）位于膜（11）的正下方，并且在制造过程中使用第一牺牲层形成。 介于第一和第二电极（13和23）之间的是在制造过程中使用第二牺牲层形成的第二腔体（17）。 多个排放孔（15）连接第一腔（9）和第二腔（17）。 声孔（31）布置在背板（14）中以便允许空气分子的自由移动，使得声波可以进入第二腔（17）。 与背容积（33）相关联的第一和第二空腔（9和17）允许膜（11）响应于通过背板（14）中的声孔（31）进入的声波而移动， 。 提供第一和第二牺牲层具有在制造期间保护膜的优点，以及使背蚀刻工艺与膜的定义分离。 排放孔（15）有助于去除第一和第二牺牲层。 排放孔（15）也有助于麦克风的操作特性。

公开(公告)号：WO2009081189A1

公开(公告)日：2009-07-02

申请号：PCT/GB2008/051184

申请日：2008-12-12

Applicant: WOLFSON MICROELECTRONICS PLC ,  MAGRATH, Anthony, James ,  CLEMOW, Richard

Inventor： MAGRATH, Anthony, James ,  CLEMOW, Richard

IPC: G10K11/178

CPC classification number: G10K11/178 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3056 ,  G10K2210/504

Abstract: There is provided a method of calibrating a noise cancellation system, the noise cancellation system being for use in a device comprising a microphone for detecting ambient noise and generating a noise signal; a signal processor for generating a noise cancellation signal from the noise signal; and a speaker for receiving the noise cancellation signal such that the speaker generates a sound signal therefrom, in which the detected ambient noise has been at least partially cancelled, the method comprising: applying a test signal to the speaker to generate a test sound; detecting the test sound with the microphone; and adapting the signal processor on the basis of the detected test sound.

Abstract translation: 提供了一种校准噪声消除系统的方法，噪声消除系统用于包括用于检测环境噪声并产生噪声信号的麦克风的设备中; 信号处理器，用于从噪声信号产生噪声消除信号; 以及扬声器，用于接收噪声消除信号，使得扬声器从中产生一个声音信号，其中检测到的环境噪声已被至少部分地消除，该方法包括：将测试信号施加到扬声器以产生测试声音; 用麦克风检测测试声音; 并根据检测到的测试声音对信号处理器进行调整。

公开(公告)号：WO2009024762A2

公开(公告)日：2009-02-26

申请号：PCT/GB2008/002772

申请日：2008-08-15

Applicant: WOLFSON MICROELECTRONICS PLC ,  TRAYNOR, Anthony, Bernard ,  LAMING, Richard, Ian ,  HOEKSTRA, Tsjerk, Hans

Inventor： TRAYNOR, Anthony, Bernard ,  LAMING, Richard, Ian ,  HOEKSTRA, Tsjerk, Hans

IPC: B81B3/00

CPC classification number: H04R19/04 ,  B81B3/0021 ,  B81B3/0072 ,  B81B3/0094 ,  B81B2201/00 ,  B81B2201/0235 ,  B81B2201/0257 ,  B81B2201/0264 ,  H01L27/00 ,  H04R19/00 ,  H04R19/005 ,  H04R23/00 ,  H04R31/00 ,  H04R2499/11

Abstract: A method of fabricating a micro-electrical-mechanical system (MEMS) transducer comprises the steps of forming a membrane (5) on a substrate (3), and forming a back-volume in the substrate. The step of forming a back-volume in the substrate comprises the steps of forming a first back-volume portion (7a) and a second back-volume portion (7b), the first back-volume portion (7a) being separated from the second back-volume portion (7b) by a step in a sidewall of the back-volume. The cross-sectional area of the second back-volume portion (7b) can be made greater than the cross-sectional area of the membrane (5), thereby enabling the back-volume to be increased without being constrained by the cross-sectional area of the membrane (5). The back-volume may comprise a third back-volume portion. The third back-volume portion enables the effective diameter of the membrane to be formed more accurately.

Abstract translation: 制造微机电系统（MEMS）换能器的方法包括以下步骤：在衬底（3）上形成膜（5），并在衬底中形成后体积。 在衬底中形成背部体积的步骤包括形成第一后部容积部分（7a）和第二后部体积部分（7b）的步骤，第一后部体积部分（7a）与第二后部体积部分 后体积部分（7b）通过后体积的侧壁中的台阶。 第二后部容积部分（7b）的横截面面积可以大于膜（5）的横截面面积，从而能够增加后部体积而不受横截面积的约束 的膜（5）。 背部容积可以包括第三后部体积部分。 第三后部体积部分能够更准确地形成膜的有效直径。

公开(公告)号：WO2009019460A1

公开(公告)日：2009-02-12

申请号：PCT/GB2008/002644

申请日：2008-08-04

Applicant: WOLFSON MICROELECTRONICS PLC ,  LESSO, John, Paul

Inventor： LESSO, John, Paul

IPC: H03F1/02 ,  H03F1/30

CPC classification number: H03G3/3015 ,  H03F1/0216 ,  H03F1/0227 ,  H03F1/0261 ,  H03F1/30 ,  H03F3/185 ,  H03F3/193 ,  H03F2200/03 ,  H03F2200/504 ,  H03G3/001

Abstract: There is provided an amplifier circuit, comprising: an input, for receiving an input signal to be amplified; a power amplifier, for amplifying the input signal; a switched power supply, having a switching frequency, for providing at least one supply voltage to the power amplifier; and a dither block, for dithering the switching frequency of the switched power supply. The dither block is controlled based on the input signal. Another aspect of the invention involves using first and second switches, each having different capacitances and resistances, and using the first or second switch depending on the input signal or volume signal. Another aspect of the invention involves controlling a bias signal provided to one or more components in the signal path based on the input signal or volume signal.

Abstract translation: 提供了一种放大器电路，包括：输入端，用于接收待放大的输入信号; 功率放大器，用于放大输入信号; 具有开关频率的开关电源，用于向所述功率放大器提供至少一个电源电压; 以及抖动块，用于使开关电源的开关频率抖动。 基于输入信号控制抖动块。 本发明的另一方面涉及使用具有不同电容和电阻的第一和第二开关，以及根据输入信号或音量信号使用第一或第二开关。 本发明的另一方面涉及基于输入信号或音量信号控制提供给信号路径中的一个或多个分量的偏置信号。

公开(公告)号：WO2008078119A1

公开(公告)日：2008-07-03

申请号：PCT/GB2007/050787

申请日：2007-12-21

Applicant: WOLFSON MICROELECTRONICS PLC ,  LESSO, John, Paul ,  PENNOCK, John, Laurence ,  FRITH, Peter, John,

Inventor： LESSO, John, Paul ,  PENNOCK, John, Laurence ,  FRITH, Peter, John,

IPC: H02M3/07

CPC classification number: H02M3/07 ,  H02M2001/009 ,  H02M2003/071 ,  H02M2003/072

Abstract: A charge pump circuit and associated method and apparatuses for providing a plurality of output voltages using a single flying capacitor is disclosed, the circuit comprising, a network of switches (410) that is operable in a number of different states and a controller (420) for operating said switches in a sequence of said states so as to generate positive and negative output voltages together spanning a voltage approximately equal to the input voltage and centred on the voltage at the common terminal.

Abstract translation: 公开了一种电荷泵电路和用于使用单个飞行电容器提供多个输出电压的相关联的方法和装置，该电路包括可在多个不同状态下操作的开关网络（410）和控制器（420） 用于以所述状态的顺序操作所述开关，以便一起产生正和负输出电压，跨越大约等于输入电压的电压并且以公共端的电压为中心。