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公开(公告)号：US10433046B2
公开(公告)日：2019-10-01
申请号：US16130979
申请日：2018-09-13
Applicant: ESS Technology, Inc.
Inventor： A. Martin Mallinson , Robert Lynn Blair , Christian Leth Petersen , Paul Christopher Scowen
Abstract: An improved system and method for reducing the ambient noise experienced by a user listening to an earpiece without the use of a microphone is disclosed. An “ambient noise signal” created by the sound pressure wave of the ambient noise acting on the earpiece transducer is obtained. In some embodiments, the ambient noise signal is inverted and fed back, and the inverted signal is added to the intended audio signal being sent to the earpiece so that the ambient noise is cancelled. In other embodiments, a processor receives the ambient noise signal and predicts the modification to the intended audio signal needed to counteract the ambient noise. The ambient noise signal may be obtained by comparing the actual signal across the earpiece transducer to the intended audio signal, or by detecting variations in the current across the transducer from the current generated to drive the transducer.
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公开(公告)号：US20200068290A1
公开(公告)日：2020-02-27
申请号：US16672473
申请日：2019-11-03
Applicant: ESS Technology, Inc.
Inventor： A. Martin Mallinson , Robert Lynn Blair , Christian Leth Petersen , Paul Christopher Scowen
Abstract: An improved system and method for recognizing an audio signal due to physical activity and taking a predetermined action in response is disclosed. A “reverse noise signal” created by the sound pressure wave of the physical activity acting on the earpiece transducer is obtained. In some embodiments, an ambient noise signal is inverted and fed back, and the inverted signal is added to the intended audio signal being sent to the earpiece so that the ambient noise is cancelled. In other embodiments, a processor receives the ambient noise signal and predicts the modification to the intended audio signal needed to counteract the ambient noise. In other embodiments, the reverse noise signal may represent a motor or biological activity of a user; the system may take different actions in response to different physical activities, such as a heart beat of the user, or a tap, footfall, or swallowing by the user.
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公开(公告)号：US08693972B2
公开(公告)日：2014-04-08
申请号：US13668253
申请日：2012-11-03
Applicant: ESS Technology, Inc
Inventor： Dustin Dale Forman , A. Martin Mallinson , Robert Lynn Blair
CPC classification number: H03D7/18 , H03D7/165 , H03D2200/0062 , H03D2200/0068 , H03D2200/0072
Abstract: A method and system is disclosed for designing a radio for down-converting RF signals to IF signals by sampling the signals in a round-robin sampling circuit and multiplying the samples by coefficients that are changed at a fixed rate equal to the rate of operation of each of the sampling circuits. The circuit is able to down-convert multiple channels simultaneously to adjacent positions in the IF band, while rejecting unwanted image signals. The method and system avoids the difficulty and cost of directly digitizing the RF signal, allowing each component to operate at a greatly reduced speed. The coefficients are selected to provide the desired transfer function while keeping the output signal centered at a desired frequency.
Abstract translation: 公开了一种用于设计用于将RF信号下变频成IF信号的无线电装置的方法和系统，该方法和系统是通过对循环采样电路中的信号进行采样并将采样乘以以等于 每个采样电路。 该电路能够将多个信道同时下变频到IF频带中的相邻位置，同时拒绝不需要的图像信号。 该方法和系统避免了直接数字化RF信号的困难和成本，从而允许每个组件以大大降低的速度运行。 选择系数以提供期望的传递函数，同时将输出信号保持在期望频率的中心。
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公开(公告)号：US20130115906A1
公开(公告)日：2013-05-09
申请号：US13668253
申请日：2012-11-03
Applicant: ESS Technology, Inc.
Inventor： Dustin Dale Forman , A. Martin Mallinson , Robert Lynn Blair
IPC: H04B1/26
CPC classification number: H03D7/18 , H03D7/165 , H03D2200/0062 , H03D2200/0068 , H03D2200/0072
Abstract: A method and system is disclosed for designing a radio for down-converting RF signals to IF signals by sampling the signals in a round-robin sampling circuit and multiplying the samples by coefficients that are changed at a fixed rate equal to the rate of operation of each of the sampling circuits. The circuit is able to down-convert multiple channels simultaneously to adjacent positions in the IF band, while rejecting unwanted image signals. The method and system avoids the difficulty and cost of directly digitizing the RF signal, allowing each component to operate at a greatly reduced speed. The coefficients are selected to provide the desired transfer function while keeping the output signal centered at a desired frequency.
Abstract translation: 公开了一种用于设计用于将RF信号下变频成IF信号的无线电装置的方法和系统，该方法和系统是通过对循环采样电路中的信号进行采样并将采样乘以以等于 每个采样电路。 该电路能够将多个信道同时下变频到IF频带中的相邻位置，同时拒绝不需要的图像信号。 该方法和系统避免了直接数字化RF信号的困难和成本，从而允许每个组件以大大降低的速度运行。 选择系数以提供期望的传递函数，同时将输出信号保持在期望频率的中心。
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公开(公告)号：US09793867B2
公开(公告)日：2017-10-17
申请号：US15331857
申请日：2016-10-22
Applicant: ESS Technology, Inc.
Inventor： Peter John Frith , Yongsheng Xu , A. Martin Mallinson , Robert Lynn Blair
CPC classification number: H03F3/2173 , H03F1/0227 , H03F3/185 , H03F2200/03 , H04R3/04
Abstract: An apparatus and method are disclosed for providing output signal swings that are greater than the supply voltage in a class-D amplifier. The amplifier circuit boosts the voltage across the amplifier load, such as a loudspeaker, by using capacitors to “charge pump” the voltage across the load and thus increase the voltage temporarily. This is done by using two or more output bridges rather than one, and connecting the bridges through the capacitors. For signals of less than the supply voltage, only an inner bridge, similar to a full bridge of the prior art, operates. For signals above the supply voltage, an outer bridge charges capacitors, which are then used to ‘boost’ the voltage on the bridge output for the short period of the Class-D switching period. Thus, only relatively small value boosting capacitors are needed, as they do not need to supply charge for very long.
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Patent Agency Ranking
公开(公告)号：US20170126187A1
公开(公告)日：2017-05-04
申请号：US15261938
申请日：2016-09-10
Applicant: ESS Technology, Inc.
Inventor： Peter John Frith , Yongsheng Xu , A. Martin Mallinson , Robert Lynn Blair
CPC classification number: H03F3/2173 , H03F1/0205 , H03F1/0233 , H03F1/3205 , H03F3/185 , H03F3/217 , H03F3/2171 , H03F3/2175 , H03F3/3061 , H03F3/68 , H03F2200/03 , H04R3/00 , H04R3/04
Abstract: An apparatus and method are disclosed for providing output signal swings that are greater than the supply voltage in a class-D amplifier. The amplifier circuit boosts the voltage across the amplifier load, such as a loudspeaker, by using capacitors to “charge pump” the voltage across the load and thus increase the voltage temporarily. This is done by using two or more output bridges rather than one, and connecting the bridges through the capacitors. For signals of less than the supply voltage, only an inner bridge, similar to a full bridge of the prior art, operates. For signals above the supply voltage, an outer bridge charges capacitors, which are then used to ‘boost’ the voltage on the bridge output for the short period of the Class-D switching period. Thus, only relatively small value boosting capacitors are needed, as they do not need to supply charge for very long.
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公开(公告)号：US09130645B2
公开(公告)日：2015-09-08
申请号：US14022155
申请日：2013-09-09
Applicant: ESS Technology, Inc.
Inventor： Robert Lynn Blair , A. Martin Mallinson
CPC classification number: H04B1/26 , H04B1/0007
Abstract: A method and system is disclosed for simultaneously down-converting multiple selected signals, such as RF signals, into adjacent ranges in an intermediate frequency band so that the total resulting bandwidth, and thus the sampling rate required to digitize the signal, is minimized. A first signal is down-converted into a range starting at a lowest selected frequency in the IF band. The next signal is down-converted, into a range higher than, but near or adjacent to, the down-converted range of the first signal, and so on. A guard band may be left between the signals if desired. In this way, the selected signals occupy the minimum bandwidth required. When the selection of signals to be down-converted is changed, the frequency ranges are dynamically adjusted so that the signals being down-converted always occupy the lowest ranges of the IF band.
Abstract translation: 公开了一种方法和系统，用于同时将多个所选信号（例如RF信号）下变频到中间频带中的相邻范围，使得总结果带宽以及因此将信号数字化所需的采样率最小化。 第一信号被下变频到从IF频段中最低选定频率开始的范围。 下一个信号被降频转换成高于第一信号的下变频范围但接近或相邻的范围，等等。 如果需要，保护带可能会留在信号之间。 以这种方式，所选择的信号占用所需的最小带宽。 当要降低转换的信号的选择被改变时，动态地调节频率范围，使得被降频转换的信号总是占据IF频带的最低范围。
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公开(公告)号：US10652649B2
公开(公告)日：2020-05-12
申请号：US16427260
申请日：2019-05-30
Applicant: ESS Technology, Inc.
Inventor： A. Martin Mallinson , Robert Lynn Blair , Christian Leth Petersen , Paul Christopher Scowen
Abstract: An improved system and method for reducing the ambient noise experienced by a user listening to an earpiece without the use of a microphone is disclosed. An “ambient noise signal” created by the sound pressure wave of the ambient noise acting on the earpiece transducer is obtained. In some embodiments, the ambient noise signal is inverted and fed back, and the inverted signal is added to the intended audio signal being sent to the earpiece so that the ambient noise is cancelled. In other embodiments, a processor receives the ambient noise signal and predicts the modification to the intended audio signal needed to counteract the ambient noise. The ambient noise signal may be obtained by comparing the actual signal across the earpiece transducer to the intended audio signal, or by detecting variations in the current across the transducer from the current generated to drive the transducer.
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公开(公告)号：US09973157B2
公开(公告)日：2018-05-15
申请号：US15261938
申请日：2016-09-10
Applicant: ESS Technology, Inc.
Inventor： Peter John Frith , Yongsheng Xu , A. Martin Mallinson , Robert Lynn Blair
CPC classification number: H03F3/2173 , H03F1/0205 , H03F1/0233 , H03F1/3205 , H03F3/185 , H03F3/217 , H03F3/2171 , H03F3/2175 , H03F3/3061 , H03F3/68 , H03F2200/03 , H04R3/00 , H04R3/04
Abstract: An apparatus and method are disclosed for providing output signal swings that are greater than the supply voltage in a class-D amplifier. The amplifier circuit boosts the voltage across the amplifier load, such as a loudspeaker, by using capacitors to “charge pump” the voltage across the load and thus increase the voltage temporarily. This is done by using two or more output bridges rather than one, and connecting the bridges through the capacitors. For signals of less than the supply voltage, only an inner bridge, similar to a full bridge of the prior art, operates. For signals above the supply voltage, an outer bridge charges capacitors, which are then used to ‘boost’ the voltage on the bridge output for the short period of the Class-D switching period. Thus, only relatively small value boosting capacitors are needed, as they do not need to supply charge for very long.
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公开(公告)号：US09806684B2
公开(公告)日：2017-10-31
申请号：US15261939
申请日：2016-09-10
Applicant: ESS Technology, Inc.
Inventor： Peter John Frith , Yongsheng Xu , A. Martin Mallinson , Robert Lynn Blair
CPC classification number: H03F3/2173 , H03F1/0205 , H03F1/0233 , H03F1/3205 , H03F3/185 , H03F3/217 , H03F3/2171 , H03F3/2175 , H03F3/3061 , H03F3/68 , H03F2200/03 , H04R3/00 , H04R3/04
Abstract: An apparatus and method are disclosed for providing output signal swings that are greater than the supply voltage in a class-D amplifier. The amplifier circuit boosts the voltage across the amplifier load, such as a loudspeaker, by using capacitors to “charge pump” the voltage across the load and thus increase the voltage temporarily. This is done by using two or more output bridges rather than one, and connecting the bridges through the capacitors. For signals of less than the supply voltage, only an inner bridge, similar to a full bridge of the prior art, operates. For signals above the supply voltage, an outer bridge charges capacitors, which are then used to ‘boost’ the voltage on the bridge output for the short period of the Class-D switching period. Thus, only relatively small value boosting capacitors are needed, as they do not need to supply charge for very long.
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