公开(公告)号：US6118164A

公开(公告)日：2000-09-12

申请号：US935210

申请日：1997-09-22

Applicant: James D. Seefeldt ,  Michael F. Mattes

Inventor： James D. Seefeldt ,  Michael F. Mattes

IPC: G01L1/10 ,  G01L1/18 ,  G01L9/00 ,  G01P15/08 ,  H01L29/84 ,  H01L21/00 ,  H01L21/76

CPC classification number: G01P15/0802 ,  G01L1/183 ,  G01L9/0019 ,  G01L9/0045

Abstract: A method of forming apparatus including a force transducer on a silicon substrate having an upper surface, the silicon substrate including a dopant of one of the n-type or the p-type, the force transducer including a cavity having spaced end walls and a beam supported in the cavity, the beam extending between the end walls of the cavity, the method including the steps of: (a) implanting in the substrate a layer of a dopant of said one of the n-type or the p-type; (b) depositing an epitaxial layer on the upper surface of the substrate, the epitaxial layer including a dopant of the other of the n-type or the p-type; (c) implanting a pair of spaced sinkers through the epitaxial layer and into electrical connection with said layer, each of the sinkers including a dopant of the one of the n-type or the p-type; (d) anodizing the substrate to form porous silicon of the sinkers and the layer; (e) oxidizing the porous silicon to form silicon dioxide; and (f) etching the silicon dioxide to form the cavity and beam.

Abstract translation: 一种形成装置的方法，包括在具有上表面的硅衬底上的力换能器，所述硅衬底包括n型或p型中的一种的掺杂剂，所述力换能器包括具有间隔开的端壁的空腔和梁 支撑在空腔中，所述光束在所述腔的端壁之间延伸，所述方法包括以下步骤：（a）在所述衬底中注入所述n型或p型之一的掺杂剂层; （b）在所述衬底的上表面上沉积外延层，所述外延层包括所述n型或p型中的另一个的掺杂剂; （c）通过所述外延层注入一对间隔的沉降片并与所述层电连接，所述沉降片中的每一个包括所述n型或p型之一的掺杂剂; （d）阳极氧化所述衬底以形成所述沉降片和所述层的多孔硅; （e）氧化多孔硅以形成二氧化硅; 和（f）蚀刻二氧化硅以形成腔和束。

公开(公告)号：US5574361A

公开(公告)日：1996-11-12

申请号：US364598

申请日：1994-12-27

Applicant: James D. Seefeldt ,  Timothy C. Ausavich ,  Jeffrey J. Bloom

Inventor： James D. Seefeldt ,  Timothy C. Ausavich ,  Jeffrey J. Bloom

IPC: G01D5/245 ,  G01P3/44 ,  G01P3/488

CPC classification number: G01P3/443 ,  G01P3/488

Abstract: A bearing assembly for a vehicle including a fixed element, a rotating element rotating relative to the fixed element about an axis, and an annular sensor connected to one of the fixed element and the rotating element. The sensor includes a pick-up coil and an annular magnet connected to the pick-up coil. The magnet has a plurality of magnetic regions which alternate in polarity around the magnet. The magnet generates a magnetic flux path magnetically coupling the magnet to the coil and resulting in the generation of an electrical signal in the coil. The rotating bearing element includes a plurality of gear teeth. The gear teeth generate a change in the reluctance of the magnetic flux path to vary the electrical signal in response to the angular speed of the fixed element relative to the rotating element.

Abstract translation: 一种用于车辆的轴承组件，包括固定元件，相对于固定元件围绕轴线旋转的旋转元件以及连接到固定元件和旋转元件之一的环形传感器。 传感器包括拾取线圈和连接到拾取线圈的环形磁体。 磁体具有多个在磁体周围交替极性的磁性区域。 磁体产生磁耦合磁体到线圈并导致在线圈中产生电信号的磁通量。 旋转轴承元件包括多个齿轮齿。 齿轮齿产生磁通量磁阻的变化，以响应于固定元件相对于旋转元件的角速度改变电信号。

公开(公告)号：US08058689B2

公开(公告)日：2011-11-15

申请号：US12939770

申请日：2010-11-04

Applicant: Cheisan J. Yue ,  James D. Seefeldt

Inventor： Cheisan J. Yue ,  James D. Seefeldt

IPC: H01L29/786

CPC classification number: H01L21/76283 ,  H01L21/765 ,  H01L21/84 ,  H01L27/1203

Abstract: An integrated circuit has a buried insulation layer formed over a semiconductor substrate, and a semiconductor mesa formed over the buried insulation layer. A low resistivity guard ring substantially surrounds the semiconductor mesa and is in contact with the semiconductor substrate. The low resistivity guard ring is grounded and isolates the semiconductor mesa from RF signals.

Abstract translation: 集成电路具有形成在半导体衬底上的掩埋绝缘层和形成在掩埋绝缘层上的半导体台面。 低电阻率保护环基本上围绕半导体台面并与半导体衬底接触。 低电阻率保护环接地，并将半导体台面与RF信号隔离开来。

公开(公告)号：US07423492B2

公开(公告)日：2008-09-09

申请号：US11254474

申请日：2005-10-20

Applicant: James D. Seefeldt

Inventor： James D. Seefeldt

IPC: H03L7/095

CPC classification number: H03L7/105 ,  H03L7/095 ,  H03L7/10 ,  Y10S331/02

Abstract: A system and method for generating a reset signal within a Phase Locked Loop (PLL) circuit is described. The reset signal is generated by inputting a reference signal and a lock detect signal into reset circuitry. The reset circuitry within the PLL comprises a series of interconnected latches, or D flip-flops, which are used to create a delay time. The delay time is the amount of time the reset circuit will wait until the reset signal indicates a reset. The reset circuit may also generate a reset signal having a pulse width. The pulse width is determined by the series of interconnected latches. The reset signal may be used to reset a Voltage Controlled Oscillator (VCO) or other circuits within a PLL or it may be used by circuits external to the PLL.

Abstract translation: 描述了在锁相环（PLL）电路内产生复位信号的系统和方法。 通过将参考信号和锁定检测信号输入复位电路来产生复位信号。 PLL内的复位电路包括一系列互连的锁存器或D触发器，用于产生延迟时间。 延迟时间是复位电路等待复位信号指示复位的时间量。 复位电路还可以产生具有脉冲宽度的复位信号。 脉冲宽度由一系列互连的锁存器确定。 复位信号可用于复位压控振荡器（VCO）或PLL内的其他电路，或者可由PLL外部的电路使用复位信号。

公开(公告)号：US5744950A

公开(公告)日：1998-04-28

申请号：US647308

申请日：1996-05-09

Applicant: James D. Seefeldt

Inventor： James D. Seefeldt

IPC: G01P3/487 ,  G01P3/488 ,  G01P3/489 ,  G01P3/481 ,  H03K3/017 ,  G01P33/09

CPC classification number: G01P3/489 ,  G01P3/488

Abstract: A sensor for determining the rotational speed of a rotating element. The sensor includes a giant magnetoresistive ratio sensing device which is magnetically coupled to the rotating element and includes an output terminal. The sensing device generates an output signal at the output terminal having a frequency corresponding to the rotational speed of the rotating element. A wave-shaping circuit is connected to the output terminal for receiving the output signal and for generating a digital switching signal having a frequency equal to the frequency of the output signal. A frequency divider has an input connected to the wave shaping circuit for receiving the digital switching signal. The frequency divider generates, in response to the digital switching signal, a square wave output having a 50% duty cycle and a frequency equal to the frequency of the digital switching signal divided by a predetermined divisor.

Abstract translation: 用于确定旋转元件的旋转速度的传感器。 传感器包括磁耦合到旋转元件并包括输出端的巨磁阻比检测装置。 感测装置在输出端产生具有与旋转元件的旋转速度对应的频率的输出信号。 波形整形电路连接到输出端子，用于接收输出信号并产生频率等于输出信号频率的数字切换信号。 分频器具有连接到波形整形电路的输入端，用于接收数字切换信号。 分频器响应于数字切换信号产生具有50％占空比和等于数字开关信号的频率除以预定除数的频率的方波输出。

公开(公告)号：US5695285A

公开(公告)日：1997-12-09

申请号：US692985

申请日：1996-08-07

Applicant: Jeffrey A. Kuberka ,  Michael F. Mattes ,  James D. Seefeldt ,  William J. Day

Inventor： Jeffrey A. Kuberka ,  Michael F. Mattes ,  James D. Seefeldt ,  William J. Day

IPC: G01K1/16 ,  G01K7/00 ,  H01L35/02

CPC classification number: G01K1/16

Abstract: A temperature sensor assembly for measuring ambient temperature and including a housing defining an enclosure. A temperature sensor is mounted within the enclosure. The housing includes a brass cap and a liner for conducting heat from the brass cap to the temperature sensor. The temperature sensor is mounted on the brass liner and is electrically insulated from the brass liner by a thermally conductive material.

Abstract translation: 一种用于测量环境温度并包括限定外壳的壳体的温度传感器组件。 温度传感器安装在外壳内。 壳体包括黄铜帽和用于将热量从黄铜帽传导到温度传感器的衬垫。 温度传感器安装在黄铜衬垫上，并通过导热材料与黄铜衬垫电绝缘。

公开(公告)号：US08451062B2

公开(公告)日：2013-05-28

申请号：US13190285

申请日：2011-07-25

Applicant: James D. Seefeldt ,  Keith Golke

Inventor： James D. Seefeldt ,  Keith Golke

IPC: H03F3/68

CPC classification number: H03F3/45183 ,  H03F3/211 ,  H03F2203/45352 ,  H03F2203/45366 ,  H03F2203/45674

Abstract: This disclosure is directed to techniques for preventing or reducing perturbations of an output signal of a differential amplifier caused by ionizing radiation incident upon the amplifier. The amplifier may include an amplification module that includes a plurality of amplification units configured to amplify a difference between a first component and a second component of a differential voltage signal to generate a plurality of amplified difference signals each corresponding to the amplified difference. The amplifier may further include a combination module that combines the plurality of amplified difference signals to generate a common output signal corresponding to the amplified difference.

Abstract translation: 本公开涉及用于防止或减少由入射在放大器上的电离辐射引起的差分放大器的输出信号的扰动的技术。 放大器可以包括放大模块，其包括多个放大单元，其被配置为放大差分电压信号的第一分量和第二分量之间的差，以产生每个对应于放大差值的多个放大差分信号。 放大器还可以包括组合多个放大的差分信号以产生对应于放大差分的公共输出信号的组合模块。

公开(公告)号：US20110109354A1

公开(公告)日：2011-05-12

申请号：US12902773

申请日：2010-10-12

Applicant: Xiaoxin Feng ,  Weston Roper ,  James D. Seefeldt

Inventor： Xiaoxin Feng ,  Weston Roper ,  James D. Seefeldt

IPC: H03L7/06

CPC classification number: H03K5/156

Abstract: In general, this disclosure is directed to a duty cycle correction (DCC) circuit that adjusts a falling edge of a clock signal to achieve a desired duty cycle. In some examples, the DCC circuit may generate a pulse in response to a falling edge of an input clock signal, delay the pulse based on a control voltage, adjust the falling edge of the input clock signal based on the delayed pulse to produce an output clock signal, and adjust the control voltage based on the difference between a duty cycle of the output clock signal and a desired duty cycle. Since the DCC circuit adjusts the falling edge of the clock cycle to achieve a desired duty cycle, the DCC may be incorporated into existing PLL control loops that adjust the rising edge of a clock signal without interfering with the operation of such PLL control loops.

Abstract translation: 通常，本公开涉及一种调整时钟信号的下降沿以实现期望的占空比的占空比校正（DCC）电路。 在一些示例中，DCC电路可以响应于输入时钟信号的下降沿产生脉冲，基于控制电压延迟脉冲，基于延迟的脉冲调整输入时钟信号的下降沿以产生输出 时钟信号，并且基于输出时钟信号的占空比与期望的占空比之间的差来调节控制电压。 由于DCC电路调整时钟周期的下降沿以实现期望的占空比，所以DCC可以被并入现有的PLL控制环路中，该PLL控制环路调整时钟信号的上升沿，而不会干扰这种PLL控制环路的操作。

公开(公告)号：US07839195B1

公开(公告)日：2010-11-23

申请号：US12455572

申请日：2009-06-03

Applicant: Xiaoxin Feng ,  Weston Roper ,  James D. Seefeldt

Inventor： Xiaoxin Feng ,  Weston Roper ,  James D. Seefeldt

IPC: H03K5/04 ,  H03L7/06

CPC classification number: H03K5/156

Abstract: In general, this disclosure is directed to a duty cycle correction (DCC) circuit that adjusts a falling edge of a clock signal to achieve a desired duty cycle. In some examples, the DCC circuit may generate a pulse in response to a falling edge of an input clock signal, delay the pulse based on a control voltage, adjust the falling edge of the input clock signal based on the delayed pulse to produce an output clock signal, and adjust the control voltage based on the difference between a duty cycle of the output clock signal and a desired duty cycle. Since the DCC circuit adjusts the falling edge of the clock cycle to achieve a desired duty cycle, the DCC may be incorporated into existing PLL control loops that adjust the rising edge of a clock signal without interfering with the operation of such PLL control loops.

Abstract translation: 通常，本公开涉及一种调整时钟信号的下降沿以实现期望的占空比的占空比校正（DCC）电路。 在一些示例中，DCC电路可以响应于输入时钟信号的下降沿产生脉冲，基于控制电压延迟脉冲，基于延迟的脉冲调整输入时钟信号的下降沿以产生输出 时钟信号，并且基于输出时钟信号的占空比与期望的占空比之间的差来调节控制电压。 由于DCC电路调整时钟周期的下降沿以实现期望的占空比，所以DCC可以被并入现有的PLL控制环路中，该PLL控制环路调整时钟信号的上升沿，而不会干扰这种PLL控制环路的操作。

公开(公告)号：US07718963B2

公开(公告)日：2010-05-18

申请号：US11841432

申请日：2007-08-20

Applicant: James D. Seefeldt ,  Jeffrey J. Kriz

Inventor： James D. Seefeldt ,  Jeffrey J. Kriz

IPC: G01T1/00

CPC classification number: G01T1/026 ,  H01L31/117

Abstract: A radiation sensor and a method for making the radiation sensor are described. An ionizing radiation sensitive area is formed in a radiation insensitive or hardened die. When the sensitive area is impacted by ionizing radiation, properties of the sensitive area change. For example, the changed property may be charge density, threshold voltage, leakage current, and/or resistance. Circuitry for measuring these property changes is located in a radiation hardened area of the die. As a result, a radiation sensor may be fabricated on a single die.

Abstract translation: 描述辐射传感器和制造辐射传感器的方法。 在辐射不敏感或硬化的模具中形成电离辐射敏感区域。 当敏感区域受到电离辐射的影响时，敏感区域的性质发生变化。 例如，改变的特性可以是电荷密度，阈值电压，漏电流和/或电阻。 用于测量这些性能变化的电路位于模具的辐射硬化区域中。 结果，可以在单个管芯上制造辐射传感器。