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1. 发明授权

US07426235B1 Method of adaptive equalization for high-speed NRZ and multi-level signal data communications 有权
标题翻译：高速NRZ和多级信号数据通信的自适应均衡方法
公开(公告)号：US07426235B1
公开(公告)日：2008-09-16
申请号：US10965938
申请日：2004-10-15
申请人： Stephen D. Anderson , David E. Tetzlaff , Michael J. Gaboury , Matthew L. Bibee
发明人： Stephen D. Anderson , David E. Tetzlaff , Michael J. Gaboury , Matthew L. Bibee
IPC分类号： H04B1/38
CPC分类号： H04L25/03885 , H04L25/03343 , H04L2025/03802
摘要： Circuitry for equalizing a high data rate serial data stream that receives low frequency and high frequency test tones, accurately measures an amount of attenuation experienced by the high frequency test tone in relation to the low frequency test tone, and accordingly, produces equalization data that results in a corresponding amount of equalization or pre-emphasis being added to an outgoing signal. More specifically, however, the present invention includes both open loop and closed loop systems for equalizing or adding pre-emphasis to a signal with attenuation. In the open loop transceiver system, a presumption is made that an amount of attenuation in both the outgoing and ingoing directions are equal. In the closed loop transceiver system, a receiver determines an amount of equalization and produces the equalization data to a remote transceiver.
摘要翻译：用于均衡接收低频和高频测试音的高数据速率串行数据流的电路，精确地测量与低频测试音相关的高频测试音经历的衰减量，并因此产生结果的均衡数据在相应的均衡或预加重量被加到输出信号上。然而，更具体地，本发明包括用于均衡或增加具有衰减的信号的预加重的开环和闭环系统。在开环收发器系统中，假设输出和进入方向上的衰减量相等。在闭环收发机系统中，接收机确定均衡量，并向远程收发器产生均衡数据。

2. 发明授权

US08019019B1 DC balance compensation for AC-coupled circuits 有权
标题翻译：交流耦合电路的直流平衡补偿
公开(公告)号：US08019019B1
公开(公告)日：2011-09-13
申请号：US12551792
申请日：2009-09-01
申请人： David E. Tetzlaff , Michael J. Gaboury
发明人： David E. Tetzlaff , Michael J. Gaboury
IPC分类号： H04L25/06
CPC分类号： H04L25/0296 , H04L25/0276
摘要： A receiver has a first input port and a second input port both coupled to a differential amplifier through first and second input capacitors. A bias circuit coupled to the core side of the first input capacitor and to the core side of the second input capacitor is configured to provide a selected voltage to at least one of the first input and the second input of the differential amplifier. In one embodiment, a common mode bias circuit provides a common mode voltage to both inputs of a differential amplifier. In a particular embodiment, a run length detector monitors the output of the differential amplifier and provides a run length feedback signal or an average bit density feedback signal to the set the selected voltage between periods of data reception.
摘要翻译：接收器具有通过第一和第二输入电容器耦合到差分放大器的第一输入端口和第二输入端口。耦合到第一输入电容器的芯侧和第二输入电容器的芯侧的偏置电路被配置为向差分放大器的第一输入和第二输入中的至少一个提供所选择的电压。在一个实施例中，共模偏置电路为差分放大器的两个输入提供共模电压。在特定实施例中，游程长度检测器监视差分放大器的输出，并提供游程长度反馈信号或平均位密度反馈信号，以在数据接收周期之间设置所选择的电压。

3. 发明授权

US07620121B1 DC balance compensation for AC-coupled circuits 有权
标题翻译：交流耦合电路的直流平衡补偿
公开(公告)号：US07620121B1
公开(公告)日：2009-11-17
申请号：US11008847
申请日：2004-12-09
申请人： David E. Tetzlaff , Michael J. Gaboury
发明人： David E. Tetzlaff , Michael J. Gaboury
IPC分类号： H04L25/06
CPC分类号： H04L25/0296 , H04L25/0276
摘要： A receiver has a first input port and a second input port both coupled to a differential amplifier through first and second input capacitors. A bias circuit coupled to the core side of the first input capacitor and to the core side of the second input capacitor is configured to provide a selected voltage to at least one of the first input and the second input of the differential amplifier. In one embodiment, a common mode bias circuit provides a common mode voltage to both inputs of a differential amplifier. In a particular embodiment, a run length detector monitors the output of the differential amplifier and provides a run length feedback signal or an average bit density feedback signal to the set the selected voltage between periods of data reception.
摘要翻译：接收器具有通过第一和第二输入电容器耦合到差分放大器的第一输入端口和第二输入端口。耦合到第一输入电容器的芯侧和第二输入电容器的芯侧的偏置电路被配置为向差分放大器的第一输入和第二输入中的至少一个提供所选择的电压。在一个实施例中，共模偏置电路为差分放大器的两个输入提供共模电压。在特定实施例中，游程长度检测器监视差分放大器的输出，并提供游程长度反馈信号或平均位密度反馈信号，以在数据接收周期之间设置所选择的电压。

4. 发明授权

US07742553B1 VCO initial frequency calibration circuit and method therefore 有权
标题翻译： VCO初始频率校准电路和方法因此
公开(公告)号：US07742553B1
公开(公告)日：2010-06-22
申请号：US11035773
申请日：2005-01-14
申请人： Khaldoun Bataineh , Michael Mass , Michael J. Gaboury , David E. Tetzlaff
发明人： Khaldoun Bataineh , Michael Mass , Michael J. Gaboury , David E. Tetzlaff
IPC分类号： H03D3/24
CPC分类号： H03C3/0991 , H03L7/087 , H03L7/099 , H03L7/113 , H03L2207/06
摘要： A device and a method for processing high data rate serial data includes a VCO initial frequency calibration circuit. The circuit includes a frequency detection block for indicating a difference between a reference clock and a divided VCO clock, a frequency calibration block that produces a digital output signal based upon the difference between the reference clock and the divided VCO clock, and a digital-to-analog converter for producing an analog VCO adjust signal. The frequency detection block produces a plurality of signals based upon the reference clock and the divided VCO clock. A plurality of user selected inputs selects a frequency detection lock range and hysteresis range and a coarse loop open calibration lock and hysteresis range. The frequency calibration block implements a state machine for producing the digital output signal that sets the initial operating frequency then adjusts the frequency of the VCO clock.
摘要翻译：用于处理高数据速率串行数据的设备和方法包括VCO初始频率校准电路。电路包括用于指示参考时钟和分频VCO时钟之间的差的频率检测块，基于参考时钟和分频VCO时钟之间的差产生数字输出信号的频率校准块，以及数字到 -analog转换器，用于产生模拟VCO调整信号。频率检测块基于参考时钟和分频VCO时钟产生多个信号。多个用户选择的输入选择频率检测锁定范围和滞后范围以及粗循环打开校准锁定和滞后范围。频率校准块实现了用于产生数字输出信号的状态机，其设置初始操作频率，然后调节VCO时钟的频率。

5. 发明授权

US07599431B1 Combined decision feedback equalization and linear equalization 有权
标题翻译：组合决策反馈均衡和线性均衡
公开(公告)号：US07599431B1
公开(公告)日：2009-10-06
申请号：US10997159
申请日：2004-11-24
申请人： Stephen D. Anderson , Michael A. Nix , Brian T. Brunn , Jinghui Lu , David E. Tetzlaff
发明人： Stephen D. Anderson , Michael A. Nix , Brian T. Brunn , Jinghui Lu , David E. Tetzlaff
IPC分类号： H03H7/30
CPC分类号： H04L25/03885 , H04L25/03038 , H04L25/03057 , H04L25/03343
摘要： A communication system includes a transmitter, a communication channel, and a receiver. The transmitter includes a pre-emphasis module, a summing module, a line driver, and a decision feedback pre-emphasis (DFP) module to produce a pre-emphasized serial stream of data based on a communications channel response and an inter-symbol interference level. The receiver includes a linear equalizer, a summing module, a decision module, and a decision feedback equalization (DFE) module. The linear equalizer produces an equalized serial stream of data. The summing module sums at least one data element of the equalized serial stream of data with DFE data elements to produce equalized data elements. The decision module interprets the equalized data elements to produce interpreted data elements to DFE module, which produces the DFE data elements from the interpreted data elements.
摘要翻译：通信系统包括发射机，通信信道和接收机。发射机包括预加重模块，求和模块，线路驱动器和决策反馈预加重（DFP）模块，以基于通信信道响应和符号间干扰产生预先强调的串行数据流水平。接收机包括线性均衡器，求和模块，决策模块和判决反馈均衡（DFE）模块。线性均衡器产生均衡的串行数据流。求和模块将均衡的串行数据流中的至少一个数据元素与DFE数据元素相加以产生均衡的数据元素。决策模块解释均衡的数据元素以产生解释的数据元素到DFE模块，其从解释的数据元素产生DFE数据元素。

6. 发明授权

US5936514A Power supply input circuit for field instrument 失效
标题翻译：现场仪表电源输入电路
公开(公告)号：US5936514A
公开(公告)日：1999-08-10
申请号：US720120
申请日：1996-09-27
申请人： Stephen D. Anderson , Theodore L. Johnson , Brian S. Junk , Michael A. Orman , Theodore H. Schnaare , David E. Tetzlaff
发明人： Stephen D. Anderson , Theodore L. Johnson , Brian S. Junk , Michael A. Orman , Theodore H. Schnaare , David E. Tetzlaff
IPC分类号： G08C19/02 , H02M7/219 , H04M11/04
CPC分类号： H02M7/219 , G08C19/02 , Y10T307/858 , Y10T307/865
摘要： A field instrument includes an input circuit having a transistor bridge rectifier which is couplable to a power supply. The transistor bridge rectifier is configured to provide power from the power supply to a remainder of the field instrument.
摘要翻译：现场仪表包括具有可与电源耦合的晶体管桥式整流器的输入电路。晶体管桥式整流器被配置为从电源向现场仪器的其余部分提供电力。

7. 发明授权

US07532645B1 Receiver operable to receive data at a lower data rate 有权
标题翻译：接收器可操作以以较低的数据速率接收数据
公开(公告)号：US07532645B1
公开(公告)日：2009-05-12
申请号：US11035613
申请日：2005-01-14
申请人： Khaldoun Bataineh , Stephen D. Anderson , Michael Maas , David E. Tetzlaff
发明人： Khaldoun Bataineh , Stephen D. Anderson , Michael Maas , David E. Tetzlaff
IPC分类号： H04J3/07
CPC分类号： H04L7/0338
摘要： A receiver that includes: an oversampling module that converts a serial stream of data into a plurality of streams of oversampled data based on the receive clock; a transition location module that determines transition locations of the streams of oversampled data and the receive clock; a pointer adjust module that determines a pointer variable based on the transition locations and the receive clock; a data selection module that determines an equivalent data value for the streams of oversampled data based on the pointer variable; a staging register module that produces an offset data word and an extra data word from the equivalent data value for the oversampled data streams; and a output register module that produces a parallel data output from at least one of the offset data word and the extra data word.
摘要翻译：一种接收机，包括：过采样模块，其基于所述接收时钟将串行数据流转换为多个过采样数据流; 转移位置模块，其确定过采样数据流和接收时钟的转换位置; 指针调整模块，其基于所述转换位置和所述接收时钟来确定指针变量; 数据选择模块，其基于指针变量确定过采样数据流的等效数据值; 分级寄存器模块，用于从过采样数据流的等效数据值产生偏移数据字和额外的数据字; 以及输出寄存器模块，其从偏移数据字和额外数据字中的至少一个产生并行数据输出。

8. 发明授权

US07902863B1 Methods and apparatus for device-specific configuration of a programmable integrated circuit 有权
标题翻译：可编程集成电路器件特定配置的方法和装置
公开(公告)号：US07902863B1
公开(公告)日：2011-03-08
申请号：US12049189
申请日：2008-03-14
申请人： David E. Tetzlaff , Daniel J. Ferris, III , Steven P. Young
发明人： David E. Tetzlaff , Daniel J. Ferris, III , Steven P. Young
IPC分类号： H03K19/173
CPC分类号： H03K19/17748 , G06F17/5054
摘要： Methods and apparatus for configuring a programmable integrated circuit are described. In one example, a configuration stream having first data for programming first locations in a configuration memory and an instruction for referencing circuitry in the programmable integrated circuit is received. Second data is obtained from the circuitry based on the instruction. Second locations in the configuration memory are programmed in response to the second data.
摘要翻译：描述用于配置可编程集成电路的方法和装置。在一个示例中，接收具有用于对配置存储器中的第一位置进行编程的第一数据和用于参考可编程集成电路中的电路的指令的配置流。基于该指令的电路获得第二数据。响应于第二数据对配置存储器中的第二位置进行编程。

9. 发明授权

US07336755B1 PLL with low phase noise non-integer divider 有权
标题翻译： PLL具有低相位噪声非整数分频器
公开(公告)号：US07336755B1
公开(公告)日：2008-02-26
申请号：US10864241
申请日：2004-06-08
申请人： David E. Tetzlaff
发明人： David E. Tetzlaff
IPC分类号： H03D3/24
CPC分类号： H03L7/18
摘要： A phase-locked loop with a non-integer divider utilizes a state machine to periodically select a new clock from a plurality of clocks for comparison to a reference signal after division by an integer divide by N block. Based on a desired divider ratio, the state machine selects the new clock that is phase shifted with respect to a presently selected clock. Each change from the presently selected clock to the new clock produces a selected clock cycle that is expanded or contracted by the amount of phase shift between the new clock and the presently selected clock. The integer divide by N block divides the selected clock by the integer portion of the desired divider ratio producing a divided clock that is effectively divided by a non-integer amount.
摘要翻译：具有非整数分频器的锁相环使用状态机从多个时钟周期性地选择新时钟，以便在除以N个块之后除以参考信号。基于期望的分频比，状态机选择相对于当前选择的时钟相移的新时钟。从当前选择的时钟到新时钟的每个变化产生选择的时钟周期，该时钟周期由新时钟和当前选择的时钟之间的相移量扩大或缩小。整数除以N个块将所选择的时钟除以所需分频比的整数部分，产生有效除以非整数的分频时钟。

10. 发明授权

US5909188A Process control transmitter with adaptive analog-to-digital converter 失效
标题翻译：具有自适应模数转换器的过程控制变送器
公开(公告)号：US5909188A
公开(公告)日：1999-06-01
申请号：US805128
申请日：1997-02-24
申请人： David E. Tetzlaff , James P. Ross
发明人： David E. Tetzlaff , James P. Ross
IPC分类号： G01B5/00 , G01L7/00 , G01V1/00 , G06F9/46 , G08G1/01 , H03M1/12 , H04K1/00
CPC分类号： G01L9/12 , H03M3/392 , H03M3/462
摘要： A transmitter for use in a process control setting includes a sensor adapted to couple to a process and provide a sensor output related to a parameter of the process. A modulator coupled to the sensor output responsively provides a digital bit stream output representative of the sensor output. A filter provides a current decimation output. A comparator compares a previous decimation output with the current decimation output. Circuitry is provided for transmitting an output related to the parameter based upon the current decimation.
摘要翻译：用于过程控制设置的发射器包括适于耦合到过程的传感器，并提供与过程参数相关的传感器输出。耦合到传感器输出的调制器响应地提供表示传感器输出的数字比特流输出。滤波器提供电流抽取输出。比较器将先前的抽取输出与当前的抽取输出进行比较。提供电路，用于基于当前抽取发送与参数有关的输出。

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