公开(公告)号：WO2009037480A3

公开(公告)日：2009-07-30

申请号：PCT/GB2008003192

申请日：2008-09-18

Applicant: WOLFSON MICROELECTRONICS PLC ,  LAMING RICHARD IAN ,  JENKINS COLIN ROBERT

Inventor： LAMING RICHARD IAN ,  JENKINS COLIN ROBERT

IPC: B81B3/00

CPC classification number: B81B3/0072 ,  B81B2201/0257 ,  H04R19/04 ,  H04R2499/11

Abstract: A MEMS transducer comprises a substrate (124). A membrane layer (120) is supported by the substrate (124). A back-plate layer (110) is supported by the membrane layer (120), said back-plate layer comprising a respective sidewall portion and a respective raised portion. One or more columns (116) are provided separate from the sidewall portion of the back-plate layer, said columns (116) connecting the back-plate layer, the membrane layer and the substrate.

Abstract translation: MEMS换能器包括基底（124）。 膜层（120）由衬底（124）支撑。 背板层（110）由膜层（120）支撑，所述背板层包括相应的侧壁部分和相应的凸起部分。 一个或多个柱（116）设置成与背板层的侧壁部分分离，所述柱（116）连接背板层，膜层和基板。

公开(公告)号：WO2009081190A1

公开(公告)日：2009-07-02

申请号：PCT/GB2008/051185

申请日：2008-12-12

Applicant: WOLFSON MICROELECTRONICS PLC ,  CLEMOW, Richard

Inventor： CLEMOW, Richard

IPC: H04R3/04 ,  G10K11/178 ,  H04R29/00

CPC classification number: H04R3/04 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/3056 ,  H04R1/1083 ,  H04R29/001

Abstract: There is provided a method of controlling a noise cancellation system, the noise cancellation system being for use in a device comprising a speaker for receiving a wanted signal and generating a sound signal therefrom, and the noise cancellation system comprising: a digital filter, for generating a noise cancellation signal from an input signal representative of ambient noise; and an output for applying the noise cancellation signal to the speaker in addition to the wanted signal to generate a sound signal from which the ambient noise has been at least partially cancelled. The method comprises: determining a resonant frequency of the speaker; based on the determined resonant frequency, selecting a set of filter coefficients; and applying the selected set of filter coefficients to the digital filter.

Abstract translation: 提供了一种控制噪声消除系统的方法，所述噪声消除系统用于包括用于接收有用信号并由其产生声音信号的扬声器的设备，并且所述噪声消除系统包括：数字滤波器，用于产生 来自代表环境噪声的输入信号的噪声消除信号; 以及用于除了有用信号之外还将扬声器应用噪声消除信号以产生环境噪声至少部分被消除的声音信号的输出。 该方法包括：确定扬声器的谐振频率; 基于所确定的谐振频率，选择一组滤波器系数; 以及将所选择的一组滤波器系数应用于数字滤波器。

公开(公告)号：WO2009081188A1

公开(公告)日：2009-07-02

申请号：PCT/GB2008/051183

申请日：2008-12-12

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

Inventor： CLEMOW, Richard, David ,  MAGRATH, Anthony ,James

IPC: H03H17/02 ,  H03H17/04

CPC classification number: H03H17/04 ,  H03H17/0227

Abstract: An infinite impulse response (IIR) filter is provided for receiving an input signal and outputting a filtered signal. The filter comprises feedback circuitry for feeding back said filtered signal, the feedback circuitry comprising a first delay element for delaying said filtered signal; and a sub-unit, for receiving said delayed filtered signal, for outputting a summed signal which is the difference between said delayed filtered signal and a further-delayed filtered signal, and for outputting a multiplied signal which is an inverted further-delayed filtered signal multiplied by a first filter coefficient. At least said input signal, said delayed filtered signal, said multiplied signal, and said summed signal are employed to generate said filtered signal.

Abstract translation: 提供无限脉冲响应（IIR）滤波器用于接收输入信号并输出​​滤波信号。 滤波器包括用于反馈所述滤波信号的反馈电路，所述反馈电路包括用于延迟所述滤波信号的第一延迟元件; 以及用于接收所述延迟滤波信号的子单元，用于输出作为所述延迟滤波信号与另一延迟滤波信号之差的加和信号，并输出作为反相进一步延迟滤波信号的相乘信号 乘以第一滤波器系数。 采用至少所述输入信号，所述延迟滤波信号，所述相乘信号和所述求和信号来产生所述滤波信号。

公开(公告)号：WO2009074779A1

公开(公告)日：2009-06-18

申请号：PCT/GB2008/004043

申请日：2008-12-08

Applicant: WOLFSON MICROELECTRONICS PLC ,  MACFARLANE, Douglas, James, Wallace

Inventor： MACFARLANE, Douglas, James, Wallace

IPC: H02M3/07

CPC classification number: H02M3/07

Abstract: A method of generating a voltage supply (Vout+, Vout-) from a single input supply (+V DD ), comprising connecting at least one flying capacitor (Cf) to at least one reservoir capacitor (CR1, CR2) and to the input supply in repeated cycles so as to generate a voltage on said reservoir capacitor, the cycles differing between at least two modes so that each mode generates a different voltage on said reservoir capacitor the method including changing from an existing one of said modes to enter a new one of said modes during operation, and operating in at least one transitional mode for a period prior to entering fully said new mode.

Abstract translation: 一种从单个输入电源（+ VDD）产生电压源（Vout +，Vout-）的方法，包括将至少一个快速电容器（Cf）连接到至少一个储存电容器（CR1，CR2）和与输入电源 重复循环，以便在所述储存电容器上产生电压，所述循环在至少两种模式之间不同，使得每种模式在所述储存电容器上产生不同的电压，所述方法包括从现有的所述模式中的一种转换为输入新的 所述模式在操作期间，并且在进入完全所述新模式之前的一段时间内以至少一个过渡模式操作。

公开(公告)号：WO2009037458A2

公开(公告)日：2009-03-26

申请号：PCT/GB2008003165

申请日：2008-09-18

Applicant: WOLFSON MICROELECTRONICS PLC ,  LAMING RICHARD IAN ,  JENKINS COLIN ROBERT

Inventor： LAMING RICHARD IAN ,  JENKINS COLIN ROBERT

IPC: B81B3/00

CPC classification number: B81B3/0072 ,  B81B2201/0257 ,  H04R19/005

Abstract: A MEMS device comprises a back-plate (7) having an inner portion (7a) and an outer portion (7b), the inner portion (7a) connected to the outer portion (7b) by a sidewall (7c). A raised section or anchor ring (60) is formed in the outer portion (7b) of the back-plate, in a region of the back-plate near the inner perimeter of the outer portion. The anchor ring may comprise angled sidewalls. The thickness of the back-plate may be greater than the thickness of the material supporting the anchor ring. Embodiments are also disclosed in which a membrane comprises a raised portion and an outer portion connected by an angled sidewall.

Abstract translation: MEMS器件包括具有内部部分（7a）和外部部分（7b）的背板（7），内部部分（7a）通过侧壁（7c）连接到外部部分（7b）。 在背板的外周部的附近的区域，在背板的外侧部分（7b）上形成有凸起部分或锚定环（60）。 锚环可以包括成角度的侧壁。 背板的厚度可以大于支撑锚环的材料的厚度。 还公开了一种实施例，其中膜包括凸起部分和通过成角度侧壁连接的外部部分。

公开(公告)号：WO2009037456A2

公开(公告)日：2009-03-26

申请号：PCT/GB2008/003162

申请日：2008-09-18

Applicant: WOLFSON MICROELECTRONICS PLC ,  LAMING, Richard, Ian ,  JENKINS, Colin, Robert ,  TRAYNOR, Anthony, Bernard

Inventor： LAMING, Richard, Ian ,  JENKINS, Colin, Robert ,  TRAYNOR, Anthony, Bernard

IPC: B81B3/00

CPC classification number: B81B3/0072 ,  B81B2201/0257 ,  B81B2201/0264 ,  B81B2203/0127 ,  B81B2203/019 ,  B81C1/00103 ,  B81C2201/0108 ,  B81C2201/0157 ,  H04R19/005 ,  H04R19/04

Abstract: A MEMS device comprises a membrane layer and a back-plate layer formed over the membrane layer. The membrane layer comprises an outer portion and an inner portion raised relative to the outer portion and a sidewall for connecting the inner portion and the outer portion. The sidewall is non-orthogonal to the outer portion.

Abstract translation: MEMS器件包括膜层和形成在膜层上的背板层。 膜层包括外部部分和相对于外部部分凸起的内部部分和用于连接内部部分和外部部分的侧壁。 侧壁与外部部分不正交。

公开(公告)号：WO2009019459A1

公开(公告)日：2009-02-12

申请号：PCT/GB2008/002641

申请日：2008-08-04

Applicant: WOLFSON MICROELECTRONICS PLC ,  LESSO, John, Paul

Inventor： LESSO, John, Paul

IPC: H03F1/02

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

Abstract: An amplifier circuit comprises an input, for receiving an input signal to be amplified; a preamplifier, for amplifying the input signal based on a variable gain; a power amplifier for amplifying the signal output from the preamplifier; and a variable voltage power supply for supplying one or more supply voltages to the power amplifier. The supply voltages are adjusted based on the variable gain or the input digital signal. According to other aspects of the invention, a power supply of an amplifier circuit is clocked using a clock signal, whereby the clock signal has a frequency that varies in accordance with a volume signal or an input signal.

Abstract translation: 放大器电路包括用于接收待放大的输入信号的输入端; 前置放大器，用于基于可变增益放大输入信号; 用于放大从前置放大器输出的信号的功率放大器; 以及用于向功率放大器提供一个或多个电源电压的可变电压电源。 电源电压根据可变增益或输入数字信号进行调整。 根据本发明的其他方面，使用时钟信号对放大器电路的电源进行定时，由此时钟信号具有根据音量信号或输入信号而变化的频率。

公开(公告)号：WO2008096125A3

公开(公告)日：2009-01-15

申请号：PCT/GB2008000403

申请日：2008-02-06

Applicant: WOLFSON MICROELECTRONICS PLC ,  CLEMOW RICHARD ,  SIBBALD ALASTAIR ,  ALCOCK ROBERT DAVID

Inventor： CLEMOW RICHARD ,  SIBBALD ALASTAIR ,  ALCOCK ROBERT DAVID

IPC: G10K11/178

CPC classification number: H04R1/1083 ,  G10K11/17833 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3039 ,  G10K2210/503 ,  H04R5/033

Abstract: An adaptive, feed-forward, ambient noise-reduction system includes a reference microphone for generating first electrical signals representing incoming ambient noise, and a connection path including a circuit for inverting these signals and applying them to a loudspeaker directed into the ear of a user. The system also includes an error microphone for generating second electrical signals representative of sound (including that generated by the loudspeaker in response to the inverted first electrical signals) approaching the user's ear. An adaptive electronic filter is provided in the connection path, together with a controller for automatically adjusting one or more characteristics of the filter in response to the first and second electrical signals. The system is configured to constrain the operation of the adaptive filter such that it always conforms to one of a predetermined family of filter responses, thereby restricting the filter to operation within a predetermined and limited set of amplitude and phase characteristics.

Abstract translation: 自适应前馈环境降噪系统包括用于产生表示进入的环境噪声的第一电信号的参考麦克风，以及包括用于反转这些信号的电路的连接路径，并将其应用到定向到用户耳朵的扬声器 。 该系统还包括误差麦克风，用于产生代表用户耳朵的代表声音（包括由扬声器产生的响应于倒置的第一电信号）的第二电信号。 连接路径中提供自适应电子滤波器以及响应于第一和第二电信号自动调整滤波器的一个或多个特性的控制器。 该系统被配置为约束自适应滤波器的操作，使得它总是符合预定的滤波器响应族中的一个，从而将滤波器限制在预定和有限的幅度和相位特性集合内的操作。

公开(公告)号：WO2008096125A2

公开(公告)日：2008-08-14

申请号：PCT/GB2008/000403

申请日：2008-02-06

Applicant: WOLFSON MICROELECTRONICS PLC ,  CLEMOW, Richard ,  SIBBALD, Alastair ,  ALCOCK, Robert, David

Inventor： CLEMOW, Richard ,  SIBBALD, Alastair ,  ALCOCK, Robert, David

IPC: G10K11/178

CPC classification number: H04R1/1083 ,  G10K11/17833 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3039 ,  G10K2210/503 ,  H04R5/033

Abstract: An adaptive, feed-forward, ambient noise-reduction system includes a reference microphone for generating first electrical signals representing incoming ambient noise, and a connection path including a circuit for inverting these signals and applying them to a loudspeaker directed into the ear of a user. The system also includes an error microphone for generating second electrical signals representative of sound (including that generated by the loudspeaker in response to the inverted first electrical signals) approaching the user's ear. An adaptive electronic filter is provided in the connection path, together with a controller for automatically adjusting one or more characteristics of the filter in response to the first and second electrical signals. The system is configured to constrain the operation of the adaptive filter such that it always conforms to one of a predetermined family of filter responses, thereby restricting the filter to operation within a predetermined and limited set of amplitude and phase characteristics.

Abstract translation: 自适应前馈环境降噪系统包括用于产生表示进入的环境噪声的第一电信号的参考麦克风，以及包括用于反转这些信号的电路的连接路径，并将其应用到定向到用户耳朵的扬声器 。 该系统还包括误差麦克风，用于产生代表用户耳朵的代表声音（包括由扬声器产生的响应于倒置的第一电信号）的第二电信号。 连接路径中提供自适应电子滤波器以及响应于第一和第二电信号自动调整滤波器的一个或多个特性的控制器。 该系统被配置为约束自适应滤波器的操作，使得它总是符合预定的滤波器响应族中的一个，从而将滤波器限制在预定和有限的幅度和相位特性集合内的操作。

公开(公告)号：WO2008090342A2

公开(公告)日：2008-07-31

申请号：PCT/GB2008/000237

申请日：2008-01-23

Applicant: WOLFSON MICROELECTRONICS PLC ,  SIBBALD, Alastair ,  HOWLE, Martin

Inventor： SIBBALD, Alastair ,  HOWLE, Martin

IPC: H04R3/00 ,  G10K11/178

CPC classification number: H04R3/00 ,  G10K11/178 ,  G10K2210/1081 ,  H04R1/1083

Abstract: The invention provides improved ambient noise reduction for ear-worn devices, such as earphones and headphones and for other devices worn upon or used in close proximity to the ear, such as cellular telephone handsets, and it provides, in particular, improvements to "feed-forward" ambient noise-reduction systems. Most feed-forward noise-reduction systems available hitherto purport to operate only below about 1 kHz and, even then, provide only relatively modest amounts of noise reduction. In accordance with this invention, predetermined filter parameters, such as the gain and cut-off frequency of a selected filter stage used in the noise-reduction processing, are mathematically modelled and the model is adjusted in real-time, in response to user-interpretation of a graphical display of a predicted residual noise amplitude spectrum. This allows the user to inspect the predicted residual noise level amplitude spectrum and to iteratively adjust the filter parameters to minimise residual noise in a chosen environment. Instead of being made manually by a user, the iterative adjustments may be automated and implemented under computer control, using known data-fitting methods and/or neural networks.

Abstract translation: 本发明提供了用于诸如耳机和耳机的耳戴设备以及佩戴在耳朵附近或用于其附近的其他设备（诸如蜂窝电话手机）的改进的环境噪声降低，并且特别地提供了对“馈送” 前向“环境降噪系统。 迄今为止，大多数前馈降噪系统仅在低于约1 kHz的情况下运行，即使如此，仅提供相对适量的降噪。 根据本发明，在数学上对噪声降低处理中使用的所选滤波器级的增益和截止频率等预定滤波器参数进行数学建模，并且响应于用户 - 解释预测残差噪声振​​幅谱的图形显示。 这允许用户检查预测的残余噪声电平振幅谱，并且迭代地调整滤波器参数以使所选择的环境中的残余噪声最小化。 使用已知的数据拟合方法和/或神经网络，不是由用户手动进行的，而是可以在计算机控制下实现迭代调整。