-
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.
-
公开(公告)号：US09647640B2
公开(公告)日：2017-05-09
申请号：US14790448
申请日：2015-07-02
Applicant: ESS Technology, Inc.
Inventor： A. Martin Mallinson
CPC classification number: H03H15/02
Abstract: A system and method is disclosed for placing some of the elements of a FIR filter into a high impedance state in certain situations. When it is detected that the signal to an impedance element is the same as the previous value, then the driver of that impedance element is “turned off” or goes into a high impedance state, so that no current flows through that impedance element, and it no longer contributes to the filter output. Alternatively, if the impedance elements are the same between two adjacent taps of the delay line, the driver of one of those impedance elements may be turned off or go into a high impedance state. The technique may be particularly useful in differential output filters. Turning off a driver effectively removes the attached impedance element from the filter and reduces current flow and power consumption, thus extending battery life in mobile devices.
-
公开(公告)号：US09209806B2
公开(公告)日：2015-12-08
申请号：US14314882
申请日：2014-06-25
Applicant: ESS Technology, Inc.
Inventor： A. Martin Mallinson
IPC: H03K19/003 , H03K19/0185 , H03K5/13 , H03K5/14
CPC classification number: H03K19/00315 , H03K5/133 , H03K5/14 , H03K5/15046 , H03K19/00361 , H03K19/00369 , H03K19/018521
Abstract: A delay circuit in which the delay is independent of variations in the power supply which powers the logic gates of the delay circuit is disclosed. By separating the CMOS transistors that form each logic gate by additional CMOS bias transistors which are biased at a controlled voltage, variations in the gate delay of the inverter transistors due to variations in the power supply voltage for the inverter transistors may be minimized. In one embodiment, the constant bias voltage may be provided by a constant current source comprising a series of amplifiers each having a gain significantly less than one connected to a triple cascode.
Abstract translation: 公开了一种延迟电路，其延迟与为延迟电路的逻辑门供电的电源的变化无关。 通过将偏置在受控电压的附加CMOS偏置晶体管分离形成每个逻辑门的CMOS晶体管，由于逆变器晶体管的电源电压的变化，反相晶体管的栅极延迟的变化可能被最小化。 在一个实施例中，恒定偏置电压可以由包括一系列放大器的恒定电流源提供，每个放大器的增益明显小于连接到三重共源共栅的一个。
-
公开(公告)号：US09065384B1
公开(公告)日：2015-06-23
申请号：US14482962
申请日：2014-09-10
Applicant: ESS Technology, Inc.
Inventor： Robert L. Blair , Hu Jing Yao , Dustin Dale Forman , A. Martin Mallinson
CPC classification number: H03F1/00 , H03F1/32 , H03F3/187 , H03F3/45475 , H03F3/72 , H03F2200/03 , H03F2203/45136 , H03F2203/7221 , H03F2203/7239
Abstract: A system and method is disclosed for selecting between two electronic signals, one of high quality, such as music audio, and the other of low quality, such as telephone call audio, in a smart phone, tablet or other device. In one embodiment, when the low quality signal is to be used this is accomplished by disabling the amplifier output to disconnect the high quality audio signal from the output port, rather than by means of a switch between the amplifier and the output port as in the prior art. This eliminates degradation of the signal due to the switch when the high quality signal is to be used. The amplifier typically has an associated feedback resistor network, and this may also be disconnected by means of a switch when the low quality signal is to be used, thus preventing distortion of the low quality signal due to the feedback network being a parallel load to the output port.
Abstract translation: 公开了一种用于在智能电话，平板电脑或其他设备中的两个电子信号之间进行选择的系统和方法，诸如音乐音频之类的高质量之一和低质量的电话信号，例如电话呼叫音频。 在一个实施例中，当要使用低质量信号时，这通过禁用放大器输出来从输出端口断开高质量音频信号而不是通过放大器和输出端口之间的开关来实现，如 现有技术 这消除了当使用高质量信号时由于开关引起的信号劣化。 放大器通常具有相关联的反馈电阻器网络，并且当使用低质量信号时，这也可以通过开关断开，从而防止低质量信号由于反馈网络是并行负载而失真 输出端口
-
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。
-
Patent Agency Ranking
公开(公告)号：US20130285766A1
公开(公告)日：2013-10-31
申请号：US13848216
申请日：2013-03-21
Applicant: ESS Technology, Inc.
Inventor： A. Martin Mallinson
IPC: H03H7/01
CPC classification number: H03H7/0138 , H03H15/00
Abstract: A circuit that provides a rotating coefficient FIR filter with all necessary coefficient sets present at the same time, without the need for delay elements or devices providing for adjustable impedances is described. An input signal is sampled in round robin fashion by a plurality of sample and hold devices. The outputs of the sample and hold devices are connected to sets of impedance devices. Each set of impedance devices implements the coefficients of the desired frequency response of the filter. The impedance devices in each set are connected to the sample and hold devices in a different order from each other set, so that each set of impedance devices will produce the desired frequency response when a different one of the sampling circuits contains a new sample of the input signal. Switches connect the sets of impedance devices to an output, only one switch being closed at a time to provide the output signal.
Abstract translation: 描述了提供具有同时存在的所有必要系数组的旋转系数FIR滤波器的电路，而不需要提供可调阻抗的延迟元件或器件。 通过多个采样和保持装置以循环方式对输入信号进行采样。 采样和保持设备的输出连接到一组阻抗设备。 每组阻抗器件实现滤波器所需频率响应的系数。 每组中的阻抗装置以彼此不同的顺序连接到采样和保持装置，使得当不同的采样电路包含新的采样电路时，每组阻抗装置将产生期望的频率响应 输入信号。 开关将阻抗器件组连接到输出端，一次只有一个开关闭合以提供输出信号。
-
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。
-
公开(公告)号：US20190116414A1
公开(公告)日：2019-04-18
申请号：US16130979
申请日：2018-09-13
Applicant: ESS Technology, Inc.
Inventor： A. Martin Mallinson
CPC classification number: H04R1/1083 , A61F11/06 , H03F3/45 , H03F3/45475 , H03F2200/03 , H03M1/02 , H04R2460/01
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.
-
公开(公告)号：US20170366151A1
公开(公告)日：2017-12-21
申请号：US15620084
申请日：2017-06-12
Applicant: ESS Technology, Inc.
Inventor： A. Martin Mallinson
CPC classification number: H03G5/165 , H03G3/3005 , H03G3/32 , H03G5/005 , H03G5/025 , H03G5/24 , H03G9/025 , H03G9/18 , H04R3/007 , H04R3/04
Abstract: A circuit and method is disclosed for filtering an audio signal. The circuit has a first quadrature source and multipliers for multiplying the input signal by the I and Q outputs of the quadrature source. The multiplied inputs are then passed through a pair of low pass filters, which may have an adjustable Q factor. The outputs of the low pass filters are then multiplied in a second pair of multipliers by the I and Q outputs, respectively, of a second quadrature source, which will typically be of the same frequency, but different amplitude and phase, of the first quadrature source. The twice-multiplied signals are then summed by an adder to provide an output signal. The circuit may be modified to include a companding circuit between the low pass filters and the second pair of multipliers that determines the amplitude of the input signal, filters it, and compands the signal in a compandor. The compandor may have adjustable parameters. The circuit thus allows for far greater flexibility and control of the processing of the input signal than prior art circuits.
-
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.
-
-
-
-
-
-
-
-
-
Search Results
54
records
(took 0.014 seconds)
