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公开(公告)号：US20120081099A1
公开(公告)日：2012-04-05
申请号：US12894472
申请日：2010-09-30
IPC分类号： G05F3/16
CPC分类号： G05F3/30
摘要： An electronic reference-signal generation system includes a supply invariant bandgap reference system that generates one or more bandgap reference signals that are substantially unaffected by bulk error currents. In at least one embodiment, the bandgap reference generates a substantially invariant bandgap reference signals for a range of direct current (DC) supply voltages. Additionally, in at least one embodiment, the bandgap reference system provides substantially invariant bandgap reference signals when the supply voltage varies due to alternating current (AC) voltages. In at least one embodiment, the bandgap reference system generates a bandgap reference voltage VBG, a “proportional to absolute temperature” (PTAT) current (“iPTAT”) and a “zero dependency on absolute temperature” (ZTAT) current (“iZTAT”) that are substantially unaffected by variations in the supply voltage and unaffected by a bulk error current.
摘要翻译： 电子参考信号生成系统包括供应不变带隙基准系统，其产生基本上不受体积误差电流影响的一个或多个带隙参考信号。 在至少一个实施例中，带隙参考产生用于一系列直流（DC）电源电压的基本上不变的带隙基准信号。 另外，在至少一个实施例中，当电源电压由于交流（AC）电压而变化时，带隙基准系统提供基本上不变的带隙基准信号。 在至少一个实施例中，带隙参考系统产生带隙参考电压VBG，“与绝对温度成比例”（PTAT）电流（“iPTAT”）和“对绝对温度的零依赖”（ZTAT）电流（“iZTAT” ），其基本上不受电源电压的变化影响并且不受体错误电流的影响。
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2.发明授权Voltage isolation buffer with AC coupled and DC coupled hall effect magnetic field sensors 有权具有交流耦合和直流耦合霍尔效应磁场传感器的电压隔离缓冲器公开(公告)号：US07042208B1
公开(公告)日：2006-05-09
申请号：US11074353
申请日：2005-03-07
申请人： Larry L. Harris
发明人： Larry L. Harris
IPC分类号： G01R31/00
CPC分类号： G01D21/00 , G01D3/08 , G01D18/006
摘要： A voltage isolation buffer, including a pilot channel having a first Hall effect element and a data channel having a second Hall effect element is disclosed. The pilot channel is preferably AC coupled, and the data channel is preferably DC coupled. The voltage isolation buffer may include a calibration engine, which may be configurable to calibrate the voltage generated by the second Hall effect element based on the information from the first Hall effect element. A bi-directional voltage isolation buffer is also disclosed, including a first integrated circuit and a second integrated circuit. The first integrated circuit includes a DC coupled Hall effect sensor and an AC coupled Hall effect sensor. The second integrated circuit includes an AC coupled Hall effect sensor and a DC coupled Hall effect sensor. A method for transmitting data across a voltage isolation barrier is also disclosed including the steps of generating a first hall voltage signal, AC coupling the first Hall voltage signal, generating a second Hall voltage signal, DC coupling the second Hall voltage signal, and calibrating the second Hall voltage signal, wherein the step of calibrating is controlled by the first Hall voltage signal.
摘要翻译： 公开了一种包括具有第一霍尔效应元件的导频信道和具有第二霍尔效应元件的数据信道的电压隔离缓冲器。 导频信道优选地被AC耦合，并且数据信道优选地被直流耦合。 电压隔离缓冲器可以包括校准引擎，校准引擎可以被配置为基于来自第一霍尔效应元件的信息来校准由第二霍尔效应元件产生的电压。 还公开了一种双向电压隔离缓冲器，包括第一集成电路和第二集成电路。 第一集成电路包括直流耦合霍尔效应传感器和交流耦合霍尔效应传感器。 第二集成电路包括AC耦合霍尔效应传感器和直流耦合霍尔效应传感器。 还公开了一种用于在电压隔离屏障上传输数据的方法，包括以下步骤：产生第一霍尔电压信号，耦合第一霍尔电压信号的AC，产生第二霍尔电压信号，耦合第二霍尔电压信号的DC，以及校准 第二霍尔电压信号，其中校准步骤由第一霍尔电压信号控制。
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公开(公告)号：US06879145B1
公开(公告)日：2005-04-12
申请号：US10076951
申请日：2002-02-15
申请人： Larry L. Harris
发明人： Larry L. Harris
CPC分类号： G01D21/00 , G01D3/08 , G01D18/006
摘要： A voltage isolation buffer, comprising a pilot channel having a first Hall effect element and a data channel having a second Hall effect element is disclosed. The pilot channel is preferably AC coupled, and the data channel is preferably DC coupled. The voltage isolation buffer may comprise a means for calibration, which may be configurable to calibrate the voltage generated by the second Hall effect element based on the information from the first Hall effect element. A bi-directional voltage isolation buffer is also disclosed, comprising a first integrated circuit and a second integrated circuit. The first integrated circuit comprises a DC coupled Hall effect sensor and an AC coupled Hall effect sensor. The second integrated circuit comprises an AC coupled Hall effect sensor and a DC coupled Hall effect sensor. A method for transmitting data across a voltage isolation barrier is also disclosed comprising the steps of generating a first Hall voltage signal, AC coupling the first Hall voltage signal, generating a second Hall voltage signal, DC coupling the second Hall voltage signal, and calibrating the second Hall voltage signal, wherein the step of calibrating is controlled by the first Hall voltage signal.
摘要翻译： 公开了一种电压隔离缓冲器，包括具有第一霍尔效应元件的导频通道和具有第二霍尔效应元件的数据通道。 导频信道优选地被AC耦合，并且数据信道优选地被直流耦合。 电压隔离缓冲器可以包括用于校准的装置，其可以被配置为基于来自第一霍尔效应元件的信息来校准由第二霍尔效应元件产生的电压。 还公开了一种双向电压隔离缓冲器，包括第一集成电路和第二集成电路。 第一集成电路包括直流耦合霍尔效应传感器和交流耦合霍尔效应传感器。 第二集成电路包括交流耦合霍尔效应传感器和直流耦合霍尔效应传感器。 还公开了一种用于在电压隔离屏障上传输数据的方法，包括以下步骤：产生第一霍尔电压信号，耦合第一霍尔电压信号的AC，产生第二霍尔电压信号，耦合第二霍尔电压信号的DC，以及校准 第二霍尔电压信号，其中校准步骤由第一霍尔电压信号控制。
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4.发明授权
公开(公告)号：US5339067A
公开(公告)日：1994-08-16
申请号：US60431
申请日：1993-05-07
CPC分类号： G01R15/04
摘要： An apparatus and method is provided for dividing a voltage with a resistor voltage divider and for employing the voltage divider in an integrated circuit. The resistor voltage divider utilizes inaccessible compensation taps that are placed between nonlinearly spaced output taps. The compensation taps reduce the impact of tap resistance on the voltage divider transfer function. The number of inaccessible compensation taps placed between output taps is dependant upon a chosen tap density that is substantially maintained across the body of the resistor voltage divider. The resistor may be used in integrated circuits employing amplifiers, such as volume control circuitry.
摘要翻译： 提供了一种用于将电压与电阻分压器分压并用于在集成电路中采用分压器的装置和方法。 电阻分压器使用放置在非线性间隔的输出抽头之间的不可访问的补偿抽头。 补偿抽头降低了分接阻力对分压器传递功能的影响。 放置在输出抽头之间的不可接近的补偿抽头的数量取决于基本上保持在电阻分压器主体上的抽头密度。 电阻器可以用于采用诸如音量控制电路之类的放大器的集成电路中。
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公开(公告)号：US06362612B1
公开(公告)日：2002-03-26
申请号：US09771517
申请日：2001-01-23
申请人： Larry L. Harris
发明人： Larry L. Harris
IPC分类号： G05F304
CPC分类号： G05F3/30
摘要： An improved bandgap voltage reference circuit for providing a stable reference output voltage, useful in circuits associated with power supply voltage operations as low as approximately 1.3 Volts. The &Dgr;VBE generator is comprised of a pair of bipolar transistors operating at different current densities. Resistors in series with the transistors, in conjunction with an operational amplifier and current sources, produce a larger Voltage drop proportional to the &Dgr;VBE of the transistors. Output from the operational amplifier is connected to the base of a third bipolar transistor. The third bipolar transistor is provided as the bandgap voltage output device.
摘要翻译： 一种改进的带隙电压参考电路，用于提供稳定的参考输出电压，用于与低至约1.3伏的电源电压操作相关的电路。 DELTAVBE发生器由一对以不同电流密度工作的双极晶体管组成。 与晶体管串联的电阻器与运算放大器和电流源一起产生与晶体管的DELTAVBE成比例的更大的电压降。 来自运算放大器的输出连接到第三双极晶体管的基极。 提供第三双极晶体管作为带隙电压输出装置。
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公开(公告)号：US5475323A
公开(公告)日：1995-12-12
申请号：US186787
申请日：1994-01-25
CPC分类号： G01R15/04
摘要： An integrated circuit apparatus and method is provided for utilizing voltage dividers and differential amplifiers. An apparatus and method for dividing a voltage with a resistor voltage divider and for employing the voltage divider in an integrated circuit. The resistor voltage divider utilizes inaccessible compensation taps that are placed between nonlinearly spaced output taps. The compensation taps reduce the impact of tap resistance on the voltage divider transfer function. The number of inaccessible compensation taps placed between output taps is dependant upon a chosen tap density that is substantially maintained across the body of the resistor voltage divider. The resistor may be used in integrated circuits employing amplifiers, such as volume control circuitry. A differential amplifier is provided with an input common mode feedback loop that compensates for signal distortion due to a common mode signal. The effects that mode changes in the input transistors have on the differential gain are minimized by the input common mode feedback loop. The differential signal path has only one low frequency mode. The amplifier includes circuitry that acts on the input differential signal and circuitry that acts on the varying input common mode voltage. The common mode feedback is achieved using a variable current sink transistor. The gate voltage of the variable current sink transistor is controlled by the sum of currents flowing through transistors that are connected to the drains of the differential input transistors.
摘要翻译： 提供了一种用于利用分压器和差分放大器的集成电路装置和方法。 一种用电阻分压器分压电压并在集成电路中采用分压器的装置和方法。 电阻分压器使用放置在非线性间隔的输出抽头之间的不可访问的补偿抽头。 补偿抽头降低了分接阻力对分压器传递功能的影响。 放置在输出抽头之间的不可接近的补偿抽头的数量取决于基本上保持在电阻分压器主体上的抽头密度。 电阻器可以用于采用诸如音量控制电路之类的放大器的集成电路中。 差分放大器设置有输入共模反馈环路，其补偿由共模信号引起的信号失真。 输入晶体管中的模式变化对差分增益的影响通过输入共模反馈回路最小化。 差分信号路径只有一个低频模式。 放大器包括作用于输入差分信号的电路和作用于变化的输入共模电压的电路。 使用可变电流吸收晶体管实现共模反馈。 可变电流吸收晶体管的栅极电压由流过连接到差分输入晶体管的漏极的晶体管的电流之和来控制。
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7.发明授权
公开(公告)号：US4737710A
公开(公告)日：1988-04-12
申请号：US849364
申请日：1986-04-08
CPC分类号： G01D5/147
摘要： Hall-effect position sensor apparatus is disclosed which senses the position of a moving body and provides an output signal indicative of the position of the moving body. The apparatus includes a predetermined number of Hall-effect sensors which are positioned in a straight line and in operating proximity to a moving body made of a ferromagnetic material. A permanent magnet is operatively positioned such that the Hall-effect sensors lie in the magnetic field produced by the magnet while the moving body provides a portion of the path comprising the magnetic excitation circuit with the permanent magnet. The moving body includes portions devoid of ferromagnetic material, which causes a change in the magnetic field. The Hall-effect sensors sense the absolute value of the magnetic field and because of their particular physical alignment and separation, together with the unique interconnection of their individual electrical outputs, provide signals to amplifier devices which represent the second time derivatives of the magnetic field sensed by the Hall-effect sensors. The electrical outputs of the amplifier devices are provided to a Schmitt trigger comparator which performs the analog to digital conversion of the input signals and provides a digital logic output signal which provides a reference point with respect to the location on the moving body, of the void which causes the change in the magnetic field.
摘要翻译： 公开了一种霍尔效应位置传感器装置，其检测移动体的位置并提供表示移动体的位置的输出信号。 该装置包括预定数量的霍尔效应传感器，其定位在直线上并且靠近由铁磁材料制成的移动体运行。 永磁体被可操作地定位成使得霍尔效应传感器位于由磁体产生的磁场中，而移动体提供包括磁激励电路的路径的一部分与永磁体。 移动体包括没有铁磁材料的部分，这导致磁场的变化。 霍尔效应传感器感测磁场的绝对值，并且由于其特定的物理对准和分离，以及它们各自的电输出的独特互连，向放大器装置提供信号，放大器装置表示感测的磁场的第二次导数 由霍尔效应传感器。 放大器装置的电输出被提供给执行输入信号的模数转换的施密特触发比较器，并且提供数字逻辑输出信号，该数字逻辑输出信号相对于移动体上的位置提供参考点，空隙 这导致磁场的变化。
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公开(公告)号：US08222872B1
公开(公告)日：2012-07-17
申请号：US12493045
申请日：2009-06-26
CPC分类号： H02M3/155 , H02M3/33561 , H02M2001/0006
摘要： A auxiliary power supply having a selectable operating mode raises efficiency of a switched-power converter. By selectably controlling the input/output behavior of the auxiliary power supply receiving a voltage from an auxiliary winding of one of the power converter magnetic elements, more efficient operation of the auxiliary power supply over the full variation range of the input line voltage is achieved. By selecting the operating mode according to the relationship between the required auxiliary power supply output and the voltage available across the auxiliary winding under current operating conditions, the turns ratio of the auxiliary winding and other circuit parameters can be optimized for efficiency. Selection of the operating mode may be made by detecting the output or input voltage of the multiplier, and the selection may be performed under hysteretic control so that the variation in auxiliary power supply output voltage is reduced dynamically.
摘要翻译： 具有可选操作模式的辅助电源提高了开关电源转换器的效率。 通过可选择地控制从功率转换器磁性元件之一的辅助绕组接收电压的辅助电源的输入/输出特性，实现了在输入线电压的整个变化范围内辅助电源的更有效的操作。 通过根据所需辅助电源输出与辅助绕组在当前工作条件下可用的电压之间的关系选择工作模式，辅助绕组和其他电路参数的匝数比可以优化效率。 可以通过检测乘法器的输出或输入电压来进行操作模式的选择，并且可以在滞后控制下执行选择，使得辅助电源输出电压的变化被动态地减小。
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9.发明授权公开(公告)号：US07750724B2
公开(公告)日：2010-07-06
申请号：US11962022
申请日：2007-12-20
CPC分类号： G05F1/561 , G01R33/0029 , G01R33/07 , G05F3/08
摘要： A temperature and process-stable magnetic field sensor bias current source provides improved performance in Hall effect sensor circuits. A switched-capacitor sensing element is used to sense either a reference current or the bias current directly. A current mirror may be used to generate the bias current from the reference current, and may include multiple current source transistors coupled through corresponding control transistors that are switched using a barrel shifter to reduce variations in the bias current due to process variation. The current mirror control may be provided via a chopper amplifier to reduce flicker noise and the current mirror control voltage may be held using a track/hold circuit during transitions of the chopper amplifier to further reduce noise due to the chopping action.
摘要翻译： 温度和过程稳定的磁场传感器偏置电流源在霍尔效应传感器电路中提供了更好的性能。 开关电容感测元件用于直接感测参考电流或偏置电流。 可以使用电流镜来产生来自参考电流的偏置电流，并且可以包括通过相应的控制晶体管耦合的多个电流源晶体管，所述控制晶体管使用桶形移位器进行切换，以减少由于过程变化引起的偏置电流的变化。 可以经由斩波放大器提供电流镜控制以减少闪烁噪声，并且可以在斩波放大器的转变期间使用轨道/保持电路来保持电流镜控制电压，以进一步减少由于斩波动作引起的噪声。
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公开(公告)号：US07477178B1
公开(公告)日：2009-01-13
申请号：US11772132
申请日：2007-06-30
IPC分类号： H03M1/36
摘要： A power-optimized analog-to-digital converter (ADC) input circuit provides for optimized power consumption versus performance. The first amplifier stage of the ADC is provided by a plurality of amplifiers that are selectably enabled to provide a particular bandwidth and noise performance level. The selection of the combination of enabled amplifiers may be made in conformity with the sample rate of the converter and the amplifiers may have evenly-weighted bias currents, or unevenly weighed bias currents and may be optimized for their particular use in combinations for bandwidth and 1/f noise corner performance. The outputs of the amplifiers are combined in a combiner circuit, which may be a discrete-time chopping amplifier that receives charges from a plurality of capacitors that sample each enabled amplifier output.
摘要翻译： 功率优化的模数转换器（ADC）输入电路提供优化的功耗与性能。 ADC的第一放大级由多个放大器提供，其可选择地被实现以提供特定的带宽和噪声性能水平。 可以使得使能的放大器的组合的选择与转换器的采样率一致，并且放大器可以具有均匀加权的偏置电流或偏置电流不均匀，并且可以针对带宽和1的组合的特定用途进行优化 / f噪音角性能。 放大器的输出组合在组合器电路中，组合器电路可以是离散时间斩波放大器，其接收来自对每个使能的放大器输出采样的多个电容器的电荷。
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