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公开(公告)号：US20140010385A1
公开(公告)日：2014-01-09
申请号：US13891615
申请日：2013-05-10
Applicant: Red Lion 49 Limited
Inventor： David Joseph Mate
IPC: H03G1/00
CPC classification number: H03G1/00 , H03F3/183 , H03F3/45098 , H03F3/45502 , H03F2200/411 , H03F2203/45682 , H03G1/0023 , H03G1/0029 , H03G3/001 , H03G3/301 , H03G5/14
Abstract: An amplifier for amplifying a differential audio signal, having common-mode rejection and digital gain control, includes a current source (401) which supplies a constant level of current to a first current path (I1) and a second current path (I2), and input stage (403) which modulates the current in the current paths in response to a differential input signal, and an output stage (405) which produces an output signal by amplifying the difference in current between the current paths, a degree of feedback provided to the input stage by a feedback stage (402) that modulates the current in the current paths in response to the output signal, and the degree of modulation by the feedback stage is determined by the attenuation provided by at least one multiplying digital-to-analog converter (407) located therein.
Abstract translation: 用于放大具有共模抑制和数字增益控制的差分音频信号的放大器包括向第一电流路径（I1）和第二电流路径（I2）提供恒定电平的电流源（401） 以及输入级（403），其响应于差分输入信号调制电流路径中的电流;以及输出级（405），其通过放大电流路径之间的电流差产生输出信号，提供反馈程度 通过响应于输出信号调制电流路径中的电流的反馈级（402）到达输入级，并且由反馈级的调制程度由至少一个乘法数字 - 模拟转换器（407）。
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Patent Agency Ranking
公开(公告)号：US20170064447A1
公开(公告)日：2017-03-02
申请号：US15246373
申请日：2016-08-24
Applicant: Red Lion 49 Limited
Inventor： David Joseph Mate
CPC classification number: H04R3/04 , H03F3/187 , H03F3/45071 , H03F3/45475 , H03F2200/03 , H03F2200/165 , H03F2200/321 , H03F2203/45576 , H03F2203/45614 , H03G1/0005 , H03G1/0088 , H03G2201/106 , H03H11/245
Abstract: Apparatus (301) for switchable attenuation of a differential input signal from a microphone includes positive and negative non-attenuating paths (406, 410) have n- and p-type MOSFETs (421, 422, 423, 424) in back-to-back configurations; positive and negative attenuating paths (405, 409) have n- and p-type MOSFETs (415, 416, 418, 419) in back-to-back configurations in combination with resistors; a gate driver (425) applies a drive signal of one polarity (QNEG) to gates of the n-type MOSFETs in the attenuating paths and the p-type MOSFETs in the non-attenuating paths, and a drive signal of opposite polarity (QPOS) to the gates of the p-type MOSFETs in the attenuating paths and the n-type MOSFETs in the non-attenuating paths; and the state of the MOSFETs depends on the drive signals at their gates, and thus the input signal may be routed via either the non-attenuating paths or the attenuating paths by controlling the drive signals.
Abstract translation: 用于来自麦克风的差分输入信号的可切换衰减的装置（301）包括正和负非衰减路径（406,410），所述正衰减路径和负非衰减路径具有背对着的n型和p型MOSFET（421,422,423,424） 后退配置; 正和负衰减路径（405,409）具有背对背配置的n型和p型MOSFET（415,416,418,419），与电阻器组合; 栅极驱动器（425）将衰减路径中的n型MOSFET的栅极和非衰减路径中的p型MOSFET施加一个极性的驱动信号（QNEG）和相反极性的驱动信号（QPOS ）到衰减路径中的p型MOSFET的栅极和非衰减路径中的n型MOSFET; 并且MOSFET的状态取决于其栅极处的驱动信号，因此通过控制驱动信号可以通过非衰减路径或衰减路径来路由输入信号。
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公开(公告)号：US09723405B2
公开(公告)日：2017-08-01
申请号：US15246373
申请日：2016-08-24
Applicant: Red Lion 49 Limited
Inventor： David Joseph Mate
CPC classification number: H04R3/04 , H03F3/187 , H03F3/45071 , H03F3/45475 , H03F2200/03 , H03F2200/165 , H03F2200/321 , H03F2203/45576 , H03F2203/45614 , H03G1/0005 , H03G1/0088 , H03G2201/106 , H03H11/245
Abstract: Apparatus (301) for switchable attenuation of a differential input signal from a microphone includes positive and negative non-attenuating paths (406, 410) have n- and p-type MOSFETs (421, 422, 423, 424) in back-to-back configurations; positive and negative attenuating paths (405, 409) have n- and p-type MOSFETs (415, 416, 418, 419) in back-to-back configurations in combination with resistors; a gate driver (425) applies a drive signal of one polarity (QNEG) to gates of the n-type MOSFETs in the attenuating paths and the p-type MOSFETs in the non-attenuating paths, and a drive signal of opposite polarity (QPOS) to the gates of the p-type MOSFETs in the attenuating paths and the n-type MOSFETs in the non-attenuating paths; and the state of the MOSFETs depends on the drive signals at their gates, and thus the input signal may be routed via either the non-attenuating paths or the attenuating paths by controlling the drive signals.
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公开(公告)号：US20140153745A1
公开(公告)日：2014-06-05
申请号：US14090825
申请日：2013-11-26
Applicant: Red Lion 49 Limited
Inventor： David Joseph Mate
IPC: H03G5/16
Abstract: An equalizer (402) is shown, having a state variable filter in which a first MDAC (502) is coupled to a first integrator (503) and a second MDAC (504) is coupled to a second integrator (505) to allow control of the corner frequency of the state variable filter. The MDACs are each configured to provide variable attenuation in a plurality of discrete steps. A digital attenuation controller is coupled to and adjusts the attenuation of the MDACs independently, and effects a one-step increase in the corner frequency of the state variable filter by first determining the attenuation levels of the MDACs, and then controlling the attenuation levels of the MDACs in accordance with their existing attenuation levels.
Abstract translation: 示出了均衡器（402），其具有状态变量滤波器，其中第一MDAC（502）耦合到第一积分器（503），并且第二MDAC（504）耦合到第二积分器（505），以允许控制 状态变量滤波器的转角频率。 MDAC被配置为在多个离散步骤中提供可变衰减。 数字衰减控制器独立地耦合到MDAC的衰减并且调整MDAC的衰减，并且通过首先确定MDAC的衰减水平来实现状态可变滤波器的转角频率的一步增加，然后控制MDAC的衰减水平 MDAC根据其现有的衰减水平。
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公开(公告)号：US09257951B2
公开(公告)日：2016-02-09
申请号：US13891615
申请日：2013-05-10
Applicant: Red Lion 49 Limited
Inventor： David Joseph Mate
CPC classification number: H03G1/00 , H03F3/183 , H03F3/45098 , H03F3/45502 , H03F2200/411 , H03F2203/45682 , H03G1/0023 , H03G1/0029 , H03G3/001 , H03G3/301 , H03G5/14
Abstract: An amplifier for amplifying a differential audio signal, having common-mode rejection and digital gain control, includes a current source (401) which supplies a constant level of current to a first current path (I1) and a second current path (I2), and input stage (403) which modulates the current in the current paths in response to a differential input signal, and an output stage (405) which produces an output signal by amplifying the difference in current between the current paths, a degree of feedback provided to the input stage by a feedback stage (402) that modulates the current in the current paths in response to the output signal, and the degree of modulation by the feedback stage is determined by the attenuation provided by at least one multiplying digital-to-analog converter (407) located therein.
Abstract translation: 用于放大具有共模抑制和数字增益控制的差分音频信号的放大器包括向第一电流路径（I1）和第二电流路径（I2）提供恒定电平的电流源（401） 以及输入级（403），其响应于差分输入信号调制电流路径中的电流;以及输出级（405），其通过放大电流路径之间的电流差产生输出信号，提供反馈程度 通过响应于输出信号调制电流路径中的电流的反馈级（402）到达输入级，并且由反馈级的调制程度由至少一个乘法数字 - 模拟转换器（407）。
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公开(公告)号：US09154100B2
公开(公告)日：2015-10-06
申请号：US14090825
申请日：2013-11-26
Applicant: Red Lion 49 Limited
Inventor： David Joseph Mate
Abstract: An equalizer (402) is shown, having a state variable filter in which a first MDAC (502) is coupled to a first integrator (503) and a second MDAC (504) is coupled to a second integrator (505) to allow control of the corner frequency of the state variable filter. The MDACs are each configured to provide variable attenuation in a plurality of discrete steps. A digital attenuation controller is coupled to and adjusts the attenuation of the MDACs independently, and effects a one-step increase in the corner frequency of the state variable filter by first determining the attenuation levels of the MDACs, and then controlling the attenuation levels of the MDACs in accordance with their existing attenuation levels.
Abstract translation: 示出了均衡器（402），其具有状态变量滤波器，其中第一MDAC（502）耦合到第一积分器（503），并且第二MDAC（504）耦合到第二积分器（505），以允许控制 状态变量滤波器的转角频率。 MDAC被配置为在多个离散步骤中提供可变衰减。 数字衰减控制器独立地耦合到MDAC的衰减并且调整MDAC的衰减，并且通过首先确定MDAC的衰减水平来实现状态可变滤波器的转角频率的一步增加，然后控制MDAC的衰减水平 MDAC根据其现有的衰减水平。
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