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1. 发明授权

US6049254A Phase-locked loop which can automatically adjust to and lock upon a variable input frequency 失效
标题翻译：锁相环可以自动调节并锁定可变输入频率
公开(公告)号：US6049254A
公开(公告)日：2000-04-11
申请号：US951650
申请日：1997-10-16
申请人： David J. Knapp , David S. Trager , Tony Susanto , Larry L. Harris
发明人： David J. Knapp , David S. Trager , Tony Susanto , Larry L. Harris
IPC分类号： H03L7/08 , H03L7/183 , H03L7/197 , H03L7/18
CPC分类号： H03L7/197
摘要： An apparatus is provided for automatically and dynamically adjusting a frequency division factor of a clock divider situated in the feedback loop of a phase-locked loop (PLL). The frequency division factor is modified based on changes in the input signal frequency forwarded to the PLL. If the input signal frequency increases, the decision circuit coupled to the input of the voltage controlled oscillator records that change as an encoded digital signal. That signal will accordingly modify the current frequency division factor dependent on current division factor as well as the current input signal frequency. The decision circuit can be modeled as an A/D converter, and the control unit placed between the decision circuit and the clock divider can be modeled as a state diagram. Each state of the state diagram is indicative of a frequency division factor, or a change in that division factor, wherein the coded digital signal indicates possible change from one state to another. By modifying the frequency division factor, the PLL can dynamically lock upon a changed input signal frequency without varying the clocking signal output from the PLL. Thus, the PLL can accommodate various input signal frequencies yet maintain a relatively fixed clocking signal to be forwarded as a timing reference to a digital processor.
摘要翻译：提供了一种用于自动和动态地调整位于锁相环（PLL）的反馈环路中的时钟分频器的分频因子的装置。基于转发到PLL的输入信号频率的变化来修改分频因子。如果输入信号频率增加，则与作为编码数字信号变化的压控振荡器记录的输入相耦合的判定电路。该信号将相应地根据当前分频因子以及当前输入信号频率来修改当前的分频因子。决定电路可以被建模为A / D转换器，放置在判决电路和时钟分频器之间的控制单元可以被建模为状态图。状态图的每个状态表示分频因子或该分割因子的变化，其中编码的数字信号指示从一个状态到另一个状态的可能的改变。通过修改分频因子，PLL可以动态地锁定改变的输入信号频率，而不改变从PLL输出的时钟信号。因此，PLL可以适应各种输入信号频率，同时维持相对固定的时钟信号作为定时参考被转发到数字处理器。

2. 发明授权

US06362612B1 Bandgap voltage reference circuit 失效
标题翻译：带隙电压参考电路
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。

3. 发明授权

US5475323A Amplifier with input common mode compensation 失效
标题翻译：具有输入共模补偿的放大器
公开(公告)号：US5475323A
公开(公告)日：1995-12-12
申请号：US186787
申请日：1994-01-25
申请人： Larry L. Harris , Baker P. L. Scott, III
发明人： Larry L. Harris , Baker P. L. Scott, III
IPC分类号： G01R15/04 , H03K5/22
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。

4. 发明授权

US4737710A Hall-effect array for sensing second spatial derivative of magnetic field 失效
标题翻译：用于感测磁场的第二空间导数的霍尔效应阵列
公开(公告)号：US4737710A
公开(公告)日：1988-04-12
申请号：US849364
申请日：1986-04-08
申请人： Joel C. Van Antwerp , Larry L. Harris
发明人： Joel C. Van Antwerp , Larry L. Harris
IPC分类号： G01D5/14 , G01B7/14 , H01L43/06 , H03K17/90 , H03K19/18
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。

5. 发明授权

US08536854B2 Supply invariant bandgap reference system 有权
标题翻译：提供不变带隙参考系
公开(公告)号：US08536854B2
公开(公告)日：2013-09-17
申请号：US12894472
申请日：2010-09-30
申请人： John L. Melanson , Prashanth Drakshapalli , Larry L. Harris
发明人： John L. Melanson , Prashanth Drakshapalli , Larry L. Harris
IPC分类号： G05F3/28
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。

6. 发明申请

US20090160535A1 TEMPERATURE AND PROCESS-STABLE MAGNETIC FIELD SENSOR BIAS CURRENT SOURCE 有权
标题翻译：温度和过程稳定磁场传感器偏置电流源
公开(公告)号：US20090160535A1
公开(公告)日：2009-06-25
申请号：US11962022
申请日：2007-12-20
申请人： Thirumalai Rengachari , Kartik Nanda , Larry L. Harris , John Paulos
发明人： Thirumalai Rengachari , Kartik Nanda , Larry L. Harris , John Paulos
IPC分类号： G05F3/02
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。

7. 发明授权

US4943807A Digitally calibrated delta-sigma analog-to-digital converter 失效
标题翻译：数字校准的delta-sigma模数转换器
公开(公告)号：US4943807A
公开(公告)日：1990-07-24
申请号：US180889
申请日：1988-04-13
申请人： Adrian B. Early , Larry L. Harris , Michael J. Callahan, Jr.
发明人： Adrian B. Early , Larry L. Harris , Michael J. Callahan, Jr.
IPC分类号： H03M3/02
CPC分类号： H03M3/38 , H03M3/458
摘要： A self-calibrated analog-to-digital converter with a corrected output includes an analog modulator (18) for receiving an analog input voltage and outputting a pulse train having a value proportional to the analog input voltage. The pulse train is filtered by a digital filter (20) which has the output thereof input to a calibration module (24). The calibration module (24) is controlled by a calibration control circuit (28) and is operable to correct the output to account for offset and gain errors. Prestored calibration parameters in a register (30) are utilized for this compensation. In a self-calibration mode, the control circuit (28) is operable to control a calibration multiplexer (12) to select a zero-scale input voltage on a terminal (16) and a full-scale reference voltage on a terminal (14) for input to the modulator (18). The multiplexer (12) is controlled to selcet the zero-scale reference to calculate an offset value for storage in the register (30) and then subsequently select the full-scale reference to calculate a scale factor for storage in the register (30 ). The self-calibration mode utilizes a settling counter (36) to insure that the output of the filter (20) has settled prior to making any calculations.
摘要翻译：具有校正输出的自校准模数转换器包括用于接收模拟输入电压并输出具有与模拟输入电压成比例的值的脉冲串的模拟调制器（18）。脉冲串被数字滤波器（20）滤波，数字滤波器（20）的输出被输入到校准模块（24）。校准模块（24）由校准控制电路（28）控制，并且可操作以校正输出以考虑偏移和增益误差。寄存器（30）中的预先存储的校准参数用于此补偿。在自校准模式中，控制电路（28）可操作以控制校准多路复用器（12），以选择端子（16）上的零电平输入电压和终端（14）上的满量程参考电压，用于输入到调制器（18）。多路复用器（12）被控制以选择零标度参考以计算用于存储在寄存器（30）中的偏移值，然后随后选择满量程参考以计算用于存储在寄存器（30）中的比例因子。自校准模式利用沉降计数器（36）来确保过滤器（20）的输出在进行任何计算之前已经结算。

8. 发明申请

US20120081099A1 SUPPLY INVARIANT BANDGAP REFERENCE SYSTEM 有权
标题翻译：供应不连续带式参考系统
公开(公告)号：US20120081099A1
公开(公告)日：2012-04-05
申请号：US12894472
申请日：2010-09-30
申请人： John L. Melanson , Prashanth Drakshapalli , Larry L. Harris
发明人： John L. Melanson , Prashanth Drakshapalli , Larry L. Harris
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。

9. 发明授权

US07042208B1 Voltage isolation buffer with AC coupled and DC coupled hall effect magnetic field sensors 有权
标题翻译：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。

10. 发明授权

US06879145B1 Voltage isolation buffer with hall effect magnetic field sensor 有权
标题翻译：具有霍尔效应磁场传感器的电压隔离缓冲器
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
IPC分类号： G01D3/08 , G01D5/48 , G01D18/00 , G01R31/00
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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