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1. 发明申请

WO2006065317A2 TRACK-AND-HOLD PEAK DETECTOR CIRCUIT 审中-公开
标题翻译：跟踪和保持峰值检测电路
公开(公告)号：WO2006065317A2
公开(公告)日：2006-06-22
申请号：PCT/US2005/034815
申请日：2005-09-26
申请人： ALLEGRO MICROSYSTEMS, INC. , ROMERO, Hernan, D. , TOWNE, Jay, M. , EAGEN, Jeff , SCHELLER, Karl
发明人： ROMERO, Hernan, D. , TOWNE, Jay, M. , EAGEN, Jeff , SCHELLER, Karl
CPC分类号： H03K5/1532 , G11C27/024 , H03K5/088
摘要： A track-and-hold peak detector circuit, which can operate at low input signal frequencies, includes a capacitor to hold a peak voltage of the input signal and logic circuitry that reduces an effect of leakage current into or out of the capacitor, and therefore, provides protection against self-switching of an output signal of the peak detector circuit.
摘要翻译：可以在低输入信号频率下操作的跟踪和保持峰值检测器电路包括用于保持输入信号和逻辑电路的峰值电压的电容器，其降低漏电流到或流出电容器的影响，因此提供对峰值检测器电路的输出信号的自切换的保护。

2. 发明申请

WO2012015533A1 MAGNETIC FIELD SENSOR WITH IMPROVED DIFFERENTIATION BETWEEN A SENSED MAGNETIC FIELD SIGNAL AND A NOISE SIGNAL 审中-公开
标题翻译：感应磁场信号与噪声信号之间改善差分的磁场传感器
公开(公告)号：WO2012015533A1
公开(公告)日：2012-02-02
申请号：PCT/US2011/039394
申请日：2011-06-07
申请人： ALLEGRO MICROSYSTEMS, INC. , ROMERO, Hernan, D. , MONREAL, Gerardo
发明人： ROMERO, Hernan, D. , MONREAL, Gerardo
IPC分类号： G01R33/07 , G01R33/00
CPC分类号： G01R33/07 , G01R33/0029
摘要： A magnetic field sensor includes a Hall element configured to generate a Hall element output signal in response to a magnetic field, the Hall element output signal comprising a magnetic field signal component and an offset signal component. The magnetic field sensor also includes a Hall element modulation circuit coupled to receive the Hall element output signal and configured to generate a modulation circuit output signal. The Hall element modulation circuit is modulated with a modulation signal having a changing modulation frequency that changes between a minimum frequency and a maximum frequency.
摘要翻译：磁场传感器包括霍尔元件，其被配置为响应于磁场产生霍尔元件输出信号，霍尔元件输出信号包括磁场信号分量和偏移信号分量。磁场传感器还包括霍尔元件调制电路，该霍尔元件调制电路被耦合以接收霍尔元件输出信号并被配置为产生调制电路输出信号。霍尔元件调制电路用具有在最小频率和最大频率之间变化的调制频率的调制信号进行调制。

3. 发明申请

WO2010147713A1 SWITCHED CAPACITOR NOTCH FILTER 审中-公开
标题翻译：开关电容器插孔滤波器
公开(公告)号：WO2010147713A1
公开(公告)日：2010-12-23
申请号：PCT/US2010/034173
申请日：2010-05-10
申请人： ALLEGRO MICROSYSTEMS, INC. , ROMERO, Hernan, D.
发明人： ROMERO, Hernan, D.
IPC分类号： H03H19/00
CPC分类号： H03H19/004
摘要： A switched capacitor notch filter (100) for sampling an input signal (111) using multiple sampling capacitors (120a, 120b) and multiple non-overlapping time periods. The charge from the sampling capacitors is averaged and transferred to the filter- output (113) during another non-overlapping time period.
摘要翻译：一种用于使用多个采样电容器（120a，120b）和多个非重叠时间段对输入信号（111）进行采样的开关电容器陷波滤波器（100）。来自采样电容器的电荷被平均，并在另一个非重叠时间段期间传送到滤波器输出端（113）。

4. 发明申请

WO2008048379A1 CHOPPED HALL EFFECT SENSOR 审中-公开
标题翻译： CHOPPED霍尔效应传感器
公开(公告)号：WO2008048379A1
公开(公告)日：2008-04-24
申请号：PCT/US2007/014667
申请日：2007-06-25
申请人： ALLEGRO MICROSYSTEMS, INC. , MONREAL, Gerardo , ROMERO, Hernan, D.
发明人： MONREAL, Gerardo , ROMERO, Hernan, D.
IPC分类号： G01D3/02 , G01R33/07
CPC分类号： G01D3/02 , G01R33/02 , G01R33/07
摘要： A chopped Hall effect sensor topology includes a switched Hall plate, an amplifier responsive to an output of the switched Hall plate and a filter stage responsive to the output of the amplifier and including an anti-aliasing filter and a selective filter that is tuned to the modulation frequency. The switched Hall plate includes a Hall element and a Hall plate modulation circuit that modulates the Hall offset signal component or the magnetic signal component. In embodiments in which the Hall offset signal component is modulated by the switched Hall plate, the amplifier, if chopped, includes an even number of additional modulation circuits. In embodiments in which the magnetic signal component is modulated by the switched Hall plate, the amplifier contains an odd number of modulation circuits. The described topology provides a low noise, fast response time Hall effect sensor.
摘要翻译：切碎的霍尔效应传感器拓扑包括切换的霍尔板，响应于开关霍尔板的输出的放大器和响应于放大器的输出的滤波器级，并且包括抗混叠滤波器和选择滤波器，该滤波器被调谐到调制频率。切换的霍尔板包括霍尔元件和霍尔板调制电路，其调制霍尔偏移信号分量或磁信号分量。在其中霍尔偏移信号分量由开关霍尔板调制的实施例中，放大器如果切断，则包括偶数个附加调制电路。在其中磁信号分量由开关霍尔板调制的实施例中，放大器包含奇数个调制电路。所描述的拓扑结构提供了低噪声，快速响应时间霍尔效应传感器。

5. 发明申请

WO2011112290A1 SWITCHED CAPACITOR NOTCH FILTER WITH FAST RESPONSE TIME 审中-公开
标题翻译：具有快速响应时间的开关电容器滤波器
公开(公告)号：WO2011112290A1
公开(公告)日：2011-09-15
申请号：PCT/US2011/022831
申请日：2011-01-28
申请人： ALLEGRO MICROSYSTEMS, INC. , ROMERO, Hernan, D.
发明人： ROMERO, Hernan, D.
IPC分类号： H03H19/00
CPC分类号： H03H19/004 , H03H2011/0488
摘要： A switched capacitor notch filter for sampling an input signal using multiple sampling capacitors during multiple non-overlapping time periods. The charge from one set of sampling capacitors is averaged and transferred to the filter output during one non- overlapping time and the charge from another set of sampling capacitors is averaged and transferred to the filter output during a second non-overlapping time period.
摘要翻译：开关电容器陷波滤波器，用于在多个非重叠时间段期间使用多个采样电容器对输入信号进行采样。来自一组采样电容器的电荷被平均，并且在一个非重叠时间期间被传送到滤波器输出，并且来自另一组采样电容器的电荷被平均，并且在第二非重叠时间段期间被传送到滤波器输出。

6. 发明申请

WO2009134735A1 CHOPPER-STABILIZED AMPLIFIER AND MAGNETIC FIELD SENSOR 审中-公开
标题翻译： CHOPPER-STABILIZED放大器和磁场传感器
公开(公告)号：WO2009134735A1
公开(公告)日：2009-11-05
申请号：PCT/US2009/041873
申请日：2009-04-28
申请人： ALLEGRO MICROSYSTEMS, INC. , ROMERO, Hernan, D. , MONREAL, Gerardo
发明人： ROMERO, Hernan, D. , MONREAL, Gerardo
IPC分类号： H03F1/30 , H03F3/45 , G01R33/07
CPC分类号： H03F1/303 , G01R33/072 , H03F3/45977 , H03F2203/45212
摘要： A chopper stabilized amplifier comprises first and second front-end amplifiers (306, 318), each having a signal input (306a, 318a), a feedback input (306b, 318b) and an output (308, 320), a first switching circuit (310), first and second back-end amplifiers (314, 326) and a feedback path comprising a feedback circuit (328) and a second switching circuit (332). When applying an input signal (302a, 302b) comprising a desired AC component and an unwanted DC offset, both components are amplified by the first and second front-end amplifiers. The amplified components are than applied to the first switching circuit (310) which converts the undesired DC offset component into an undesired high-frequency signal, while the desired AC signal is converted into a desired DC signal. By connecting a suitable low-pass filter at the output of the chopper stabilized amplifier, the undesired high-frequency signal (former DC offset component) is removed.
摘要翻译：斩波稳定放大器包括第一和第二前端放大器（306,318），每个具有信号输入（306a，318a），反馈输入（306b，318b）和输出（308,320），第一开关电路（310），第一和第二后端放大器（314,326）以及包括反馈电路（328）和第二开关电路（332）的反馈路径。当应用包括期望的AC分量和不期望的DC偏移的输入信号（302a，302b）时，两个分量由第一和第二前端放大器放大。放大的分量不是施加到第一开关电路（310），该第一开关电路将期望的AC信号转换成期望的DC信号，将不期望的DC偏移分量转换成不需要的高频信号。通过在斩波稳定放大器的输出端连接合适的低通滤波器，去除不需要的高频信号（原来的直流偏移分量）。

7. 发明申请

WO2005119908A1 HIGH PASS FILTER USING INSULATED GATE FIELD EFFECT TRANSISTORS 审中-公开
标题翻译：使用绝缘栅场效应晶体管的高通滤波器
公开(公告)号：WO2005119908A1
公开(公告)日：2005-12-15
申请号：PCT/US2005/007251
申请日：2005-03-07
申请人： ALLEGRO MICROSYSTEMS, INC. , BILOTTI, Alberto , ROMERO, Hernan, D.
发明人： BILOTTI, Alberto , ROMERO, Hernan, D.
IPC分类号： H03H11/02
CPC分类号： H03H11/04 , H03H11/1291
摘要： A high pass filter comprising a combination of capacitors C1, C2 and insulated gate field effect transistors (IGFETs), M1, M2 used as effective resistors provides a low break frequency, while providing improved linearity and a stable break frequency over a relatively wide range of input voltages. The high pass filter can be realized with a small physical size. In one particular embodiment, the small physical size allows the capacitors and the IGFET devices to be integrated together onto a common substrate.
摘要翻译：包括电容器C1，C2和用作有效电阻器的绝缘栅场效应晶体管（IGFET），M1，M2的组合的高通滤波器提供低的断开频率，同时在相对宽的范围内提供改善的线性度和稳定的断开频率输入电压。高通滤波器可以用小的物理尺寸实现。在一个特定实施例中，小的物理尺寸允许电容器和IGFET器件集成在公共衬底上。

8. 发明申请

WO2013122702A1 CIRCUITS AND METHODS USING ADJUSTABLE FEEDBACK FOR SELF-CALIBRATING OR SELF-TESTING A MAGNETIC FIELD SENSOR WITH AN ADJUSTABLE TIME CONSTANT 审中-公开
标题翻译：使用可调式反馈自动校准或自动测试具有可调节时间常数的磁场传感器的电路和方法
公开(公告)号：WO2013122702A1
公开(公告)日：2013-08-22
申请号：PCT/US2013/021143
申请日：2013-01-11
申请人： ALLEGRO MICROSYSTEMS, LLC , CESARETTI, Juan, Manuel , ROMERO, Hernan, D.
发明人： CESARETTI, Juan, Manuel , ROMERO, Hernan, D.
IPC分类号： G01R33/00
CPC分类号： G01R33/0035 , G01R33/0023 , G01R33/0041
摘要： A magnetic field sensor includes a reference-field-sensing circuit channel that allows a self-test or a self-calibration of the circuitry of the magnetic field sensor. The self-test or the self calibration can have at least two different bandwidths that provide a respective at least two different rates of self-test or self-calibration.
摘要翻译：磁场传感器包括参考场感测电路通道，其允许磁场传感器的电路的自检或自校准。自检或自校准可以具有至少两个不同的带宽，其提供相应的至少两个不同的自检或自校准速率。

9. 发明申请

WO2013142015A1 METHOD AND APPARATUS TO DETECT A BROKEN WIRE CONDITION IN AN INTEGRATED CIRCUIT 审中-公开
标题翻译：在集成电路中检测线路条件的方法和装置
公开(公告)号：WO2013142015A1
公开(公告)日：2013-09-26
申请号：PCT/US2013/027886
申请日：2013-02-27
申请人： ALLEGRO MICROSYSTEMS, LLC. , PIRCHIO, Franco, Noel, Martin , VOISINE, Cory , ROMERO, Hernan, D. , MONREAL, Gerardo
发明人： PIRCHIO, Franco, Noel, Martin , VOISINE, Cory , ROMERO, Hernan, D. , MONREAL, Gerardo
IPC分类号： G01R19/165 , G01R31/02 , G01R31/04 , G01R31/28 , H03K19/003
CPC分类号： G01R31/026 , G01R31/046
摘要： An integrated circuit includes circuitry to sense the occurrence of a break in a ground connection and/or supply connection and to indicate same to an exterior environment. In at least one implementation, the break may be indicated by providing a signal on an output terminal of the device that is not associated with a normal output of the device.
摘要翻译：集成电路包括用于感测接地连接和/或供电连接中断的发生并将其指示到外部环境的电路。在至少一个实现中，可以通过在与设备的正常输出不相关联的设备的输出端上提供信号来指示中断。

10. 发明公开

EP2417702A1 SWITCHED CAPACITOR NOTCH FILTER 有权转让
标题翻译：开关电容效应滤波
公开(公告)号：EP2417702A1
公开(公告)日：2012-02-15
申请号：EP10720690.6
申请日：2010-05-10
申请人： Allegro Microsystems Inc
发明人： ROMERO, Hernan, D.
IPC分类号： H03H19/00
CPC分类号： H03H19/004
摘要： A switched capacitor notch filter for sampling an input signal using multiple sampling capacitors and multiple non-overlapping time periods. The charge from the sampling capacitors is averaged and transferred to the filter output during another non-overlapping time period.

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