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31.发明申请ANALOG-TO-DIGITAL CONVERTER (ADC) DYNAMIC RANGE ENHANCEMENT FOR VOICE-ACTIVATED SYSTEMS 有权模拟数字转换器（ADC）语音激活系统的动态范围增强公开(公告)号：US20160314805A1
公开(公告)日：2016-10-27
申请号：US14696172
申请日：2015-04-24
IPC分类号： G10L25/78 , G10L15/34 , G10L21/034 , G10L15/22
CPC分类号： G10L25/78 , G10L15/22 , G10L15/28 , G10L15/34 , G10L21/034 , G10L2015/223 , H03M1/185 , H03M3/49
摘要： The dynamic range and power efficiency of a voice-activated system may be improved by dynamically adjusting the configuration of the voice-activated system's input path. In one embodiment, a first portion of audio may be received through an input path of the voice-activated system having a first configuration. A characteristic of the first portion of audio may be determined and the input path may be adjusted to a second configuration based on the determined characteristic. A second portion of audio may then be received through the input path having the second configuration, and speech analysis may be performed on the second portion of audio.
摘要翻译： 通过动态调整语音激活的系统的输入路径的配置，可以提高语音激活的系统的动态范围和功率效率。 在一个实施例中，可以通过具有第一配置的语音激活系统的输入路径来接收音频的第一部分。 可以确定音频的第一部分的特性，并且可以基于所确定的特性将输入路径调整到第二配置。 然后可以通过具有第二配置的输入路径接收第二部分音频，并且可以在音频的第二部分上执行语音分析。
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公开(公告)号：US11933822B2
公开(公告)日：2024-03-19
申请号：US17574188
申请日：2022-01-12
CPC分类号： G01R19/0046 , G01R27/02 , G08B6/00 , H02P29/00
摘要： A method for estimating actuator parameters for an actuator, in-situ and in real-time, may include driving the actuator with a test signal imperceptible to a user of a device comprising the actuator during real-time operation of the device, measuring a voltage and a current associated with the actuator and caused by the test signal, determining one or more parameters of the actuator based on the voltage and the current, determining an actuator type of the actuator based on the one or more parameters, and controlling a playback signal to the actuator based on the actuator type.
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公开(公告)号：US11811370B2
公开(公告)日：2023-11-07
申请号：US17502689
申请日：2021-10-15
发明人： Ramin Zanbaghi , Lingli Zhang , Wei Xu , Justin Richardson , John L. Melanson
CPC分类号： H03F3/217 , G01R19/2506 , H03F2200/375
摘要： A system for sensing an electrical quantity may include a sensing stage configured to sense the electrical quantity and generate a sense signal indicative of the electrical quantity, wherein the electrical quantity is indicative of an electrical signal generated by a Class-DG amplifier configured to drive a load wherein the Class-DG amplifier has multiple signal-level common modes and a common-mode compensator configured to compensate for changes to a common-mode voltage of a differential supply voltage of the driver occurring when switching between signal-level common modes of the Class-DG amplifier.
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公开(公告)号：US11798978B2
公开(公告)日：2023-10-24
申请号：US17019621
申请日：2020-09-14
发明人： John L. Melanson , Lei Zhu , Wai-Shun Shum , Xiaofan Fei , Johann G. Gaboriau
IPC分类号： H01L23/52 , H01L49/02 , H03F1/02 , H01L23/522
CPC分类号： H01L28/10 , H01L23/5227 , H03F1/0272
摘要： A single integrated circuit may include a signal path configured to generate an output signal from an input signal, wherein the signal path includes an amplifier configured to drive the output signal, a direct-current-to-direct-current (DC-DC) power converter having a power inductor integrated in the single integrated circuit and configured to generate a supply voltage to the amplifier from a source voltage to the DC-DC power converter, and control circuitry for controlling operation of converter switches of the DC-DC power converter in order that the supply voltage tracks at least one among the input signal and the output signal.
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公开(公告)号：US11791779B2
公开(公告)日：2023-10-17
申请号：US17119228
申请日：2020-12-11
CPC分类号： H03F1/56 , H03F3/45475 , H03M1/12 , H03F2200/129 , H03F2203/45116
摘要： A method for use in an analog circuit having a plurality of differential pairs of elements, wherein for each pair of the plurality of differential pairs of elements, the elements of the pair are designed to match but may have mismatch that induces error. The method includes, for each pair of at least two pairs of the plurality of differential pairs of elements: spectrally separating the mismatch-induced error of the pair from mismatch-induced error of a remainder of the plurality of differential pairs of elements, monitoring, by an analog-to-digital converter (ADC), an output of the analog circuit, and analyzing the monitored output to measure the mismatch-induced error of the pair.
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公开(公告)号：US11782101B2
公开(公告)日：2023-10-10
申请号：US16987257
申请日：2020-08-06
摘要： A data acquisition system (DAS) for acquiring data from a Hall effect sensor includes one or more state variables, a multiplexer that periodically rotates a signal from the Hall effect sensor, and a controller that resets the one or more state variables in synchronization with rotation of the signal. The state variables may be digital states in a digital memory or voltages of capacitors the controller forces to a reset voltage. The state variables may be included in a noise-shaping SAR ADC, a delta-sigma ADC, a digital filter, an integrator, an analog filter, a VCO, an incremental ADC or an auxiliary ADC-assisted incremental ADC, or an auxiliary ADC of the DAS.
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公开(公告)号：US20220416780A1
公开(公告)日：2022-12-29
申请号：US17356606
申请日：2021-06-24
IPC分类号： H03K17/30 , H03K17/042 , H03K17/06
摘要： Pre-conditioning circuitry for pre-conditioning a node of a circuit to support a change in operation of the circuit, wherein the circuit is operative to change a state of the node to effect the change in operation of the circuit, and wherein the pre-conditioning circuitry is configured to apply a voltage, current or charge directly to the node to reduce the magnitude of the change to the state of the node required by the circuit to achieve the change in operation of the circuit.
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公开(公告)号：US11539331B2
公开(公告)日：2022-12-27
申请号：US17348982
申请日：2021-06-16
发明人： Amar Vellanki , Xin Zhao , Jing Bai , John L. Melanson , Ku He , Wai-Shun Shum , Xiaofan Fei , Alan M. Morton
摘要： An amplification system with an output driver stage for providing an output signal to acoustic output transducers such as speakers or haptic output devices removes signal distortion caused by output stage non-linearities by pre-distorting an input signal. The system includes the output driver stage, an input stage for receiving the input signal, and a processing block that receives the input signal and provides an output signal to the output driver stage. The processing block includes a pre-distortion circuit that applies a pre-distortion function to the input signal to generate the output signal if a signal level of the input signal is greater than a threshold amplitude, and if the signal level is less than or equal to the threshold amplitude, generates the output signal from the input signal by bypassing the pre-distortion circuit.
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公开(公告)号：US20220329212A1
公开(公告)日：2022-10-13
申请号：US17348982
申请日：2021-06-16
发明人： Amar Vellanki , Xin Zhao , Jing Bai , John L. Melanson , Ku He , Wai-Shun Shum , Xiaofan Fei , Alan M. Morton
摘要： An amplification system with an output driver stage for providing an output signal to acoustic output transducers such as speakers or haptic output devices removes signal distortion caused by output stage non-linearities by pre-distorting an input signal. The system includes the output driver stage, an input stage for receiving the input signal, and a processing block that receives the input signal and provides an output signal to the output driver stage. The processing block includes a pre-distortion circuit that applies a pre-distortion function to the input signal to generate the output signal if a signal level of the input signal is greater than a threshold amplitude, and if the signal level is less than or equal to the threshold amplitude, generates the output signal from the input signal by bypassing the pre-distortion circuit.
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公开(公告)号：US11438697B2
公开(公告)日：2022-09-06
申请号：US16706287
申请日：2019-12-06
发明人： John L. Melanson , Wai-Shun Shum , Leyi Yin
IPC分类号： H04R3/04 , H03M3/00 , G10L21/0232
摘要： A system may include a digital delta-sigma modulator configured to receive a digital audio input signal and quantize the digital audio input signal into a quantized signal, a filter configured to receive the quantized signal and perform filtering on the quantized signal to generate a filtered quantized signal, the filter having a variable group delay, and a current-mode digital-to-analog converter configured to receive the filtered quantized signal and convert the filtered quantized signal into an equivalent current-mode analog audio signal.
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