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1. 发明申请

US20050048931A1 FSK modulator using IQ up-mixers and sinewave coded DACs 有权
标题翻译： FSK调制器使用IQ上变频器和正弦波编码DAC
公开(公告)号：US20050048931A1
公开(公告)日：2005-03-03
申请号：US10653322
申请日：2003-09-02
申请人： Klaas Wortel , Luis Briones , Troy Stockstad
发明人： Klaas Wortel , Luis Briones , Troy Stockstad
IPC分类号： H04L27/12 , H04B1/02
CPC分类号： H04L27/12
摘要： A radio transmitter system designed using an FSK modulator with IQ up-mixers and sinewave coded digital-to-analog converters (DACs). The radio transmitter system may include a frequency shift keying (FSK) coding logic circuit coupled to the inputs of an IQ modulation and image reject up-mixer through a respective DAC and a respective low pass filter (LPF) for each the I and the Q channels. The FSK modulation scheme may employ sine and cosine signals for the I and Q channels, respectively, where the sine and cosine waves are directly coded into the DACs. The coded levels required by the DACs may be generated using current sources and may be Gray-coded. The output of the IQ modulation and image reject up-mixer may be connected to a power amplifier, which may be used to transmit the modulated RF signal via a loop antenna.
摘要翻译：无线电发射机系统使用具有IQ上变频器和正弦波编码的数模转换器（DAC）的FSK调制器设计。无线电发射机系统可以包括频移键控（FSK）编码逻辑电路，其通过相应的DAC和针对I和Q的每个的相应的低通滤波器（LPF）耦合到IQ调制和图像拒绝上混频器的输入频道 FSK调制方案可以分别将正弦和余弦信号用于I和Q通道，其中正弦和余弦波被直接编码到DAC中。 DAC所需的编码电平可以使用电流源生成，并且可以是灰色编码的。 IQ调制和图像拒绝上混频器的输出可以连接到功率放大器，功率放大器可以用于经由环形天线发送经调制的RF信号。

2. 发明申请

US20050197090A1 Current-mode direct conversion receiver 有权
标题翻译：电流模式直接转换接收器
公开(公告)号：US20050197090A1
公开(公告)日：2005-09-08
申请号：US10795740
申请日：2004-03-08
申请人： Troy Stockstad , Klaas Wortel , Luis Briones , David Lovelace
发明人： Troy Stockstad , Klaas Wortel , Luis Briones , David Lovelace
IPC分类号： H04B1/00 , H04B1/69 , H04B1/707 , H04B1/713
CPC分类号： H04B1/30
摘要： A current-mode direct conversion RF receiver is presented. In one set of embodiments the RF receiver comprises a simple transconductor input stage to create a current-mode modulated signal from a voltage-mode modulated signal. A downconversion mixer may be coupled to the transconductor input stage via a low impedance current cascode stage, and may operate to create a set of current-mode quadrature baseband signals from the current-mode modulated signal. The downconversion mixer may be implemented with a transistor-switching network, which may be driven by a phase locked loop (PLL) with quadrature outputs. The set of current-mode quadrature baseband signals may be converted back to the voltage domain by a transimpedance filter, which may perform channel selection for the receiver. The transimpedance filter may additionally include a low frequency zero to remove DC offsets. The receiver may be implemented using CMOS design technologies and operated with minimal self-mixing effects, minimal DC offset in the baseband signal, and utilizing low voltages.
摘要翻译：提出了一种电流模式直接转换RF接收机。在一组实施例中，RF接收机包括简单的跨导体输入级，以从电压模式调制信号产生电流模式调制信号。下变频混频器可以经由低阻抗电流共源共栅级耦合到跨导体输入级，并且可以操作以从当前模式调制信号创建一组电流模式正交基带信号。下变频混频器可以用晶体管切换网络来实现，其可以由具有正交输出的锁相环（PLL）来驱动。电流模式正交基带信号的集合可以通过跨阻滤波器转换回电压域，该跨阻滤波器可以对接收机执行信道选择。跨阻滤波器可以另外包括用于去除DC偏移的低频零点。接收机可以使用CMOS设计技术来实现，并且以最小的自混合效应，基带信号中的最小DC偏移和利用低电压进行操作。

3. 发明授权

US07310498B2 Communication protocol for personal computer system human interface devices over a low bandwidth, bi-directional radio frequency link 有权
标题翻译：用于个人计算机系统人机接口设备的通信协议，通过低带宽，双向射频链路
公开(公告)号：US07310498B2
公开(公告)日：2007-12-18
申请号：US10410088
申请日：2003-04-09
申请人： Trenton B. Henry , Klaas Wortel , Guy A. Stewart , Henry Wurzburg , James R. MacDonald
发明人： Trenton B. Henry , Klaas Wortel , Guy A. Stewart , Henry Wurzburg , James R. MacDonald
IPC分类号： H04B7/00
CPC分类号： H04W36/06 , H04W8/005 , H04W48/08
摘要： A system and method for maintaining communications with a radio frequency (RF) peripheral device such as an RF input device and an RF output device. A computer may search for an RF peripheral device by transmitting a signal request on available channels until a response is received from an RF peripheral device. If the RF channel becomes busy and/or jammed, the RF peripheral device may tune into a predetermined channel while the computer scans for another channel to use. Once the computer finds a better channel, the computer may go to the predetermined channel and broadcast the new channel location to the RF peripheral device. In addition, if an RF signal arrives incomplete or corrupt, the computer may transmit a negative acknowledgement to the RF peripheral device, which may retransmit the previous RF signal.
摘要翻译：用于维持与诸如RF输入设备和RF输出设备的射频（RF）外围设备的通信的系统和方法。计算机可以通过在可用信道上发送信号请求来搜索RF外围设备，直到从RF外围设备接收到响应。如果RF信道变得忙和/或卡住，则RF外围设备可以调谐到预定信道中，同时计算机扫描另一个信道使用。一旦计算机找到更好的信道，则计算机可以进入预定信道并将新的信道位置广播到RF外围设备。此外，如果RF信号到达不完整或损坏，则计算机可以向RF外围设备发送否定确认，RF外设可以重传先前的RF信号。

4. 发明授权

US07055047B2 Selective implementation of power management schemes based on detected computer operating environment 有权
标题翻译：基于检测到的计算机操作环境选择性实施电源管理方案
公开(公告)号：US07055047B2
公开(公告)日：2006-05-30
申请号：US10410089
申请日：2003-04-09
申请人： Klaas Wortel , David K. Lovelace , Luis J. Briones
发明人： Klaas Wortel , David K. Lovelace , Luis J. Briones
IPC分类号： G06F1/32
CPC分类号： G06F1/3215 , G06F1/3259 , Y02D10/155
摘要： Detecting a radio frequency (RF) environment around a computer and using a power management scheme for an RF user input device being used by the computer system. If the computer system is in a single user environment, a power management scheme may be used to conserve power on the RF user input device. If the computer system is in a multi-user environment, a power management scheme may be used to minimize interference between neighboring computer systems by minimizing the signal strength of the RF signal from the RF user input device and the RF signal from the computer system.
摘要翻译：检测计算机周围的射频（RF）环境，并为计算机系统正在使用的RF用户输入设备使用电源管理方案。如果计算机系统处于单个用户环境中，则可以使用电源管理方案来节省RF用户输入设备上的功率。如果计算机系统处于多用户环境中，则可以使用功率管理方案来最小化来自RF用户输入设备的RF信号的信号强度和来自计算机系统的RF信号来最小化相邻计算机系统之间的干扰。

5. 发明申请

US20050179035A1 Apparatus and method to access a plurality of pn-junctions with a limited number of pins 审中-公开
标题翻译：用有限数量的引脚访问多个pn结的装置和方法
公开(公告)号：US20050179035A1
公开(公告)日：2005-08-18
申请号：US10781026
申请日：2004-02-18
申请人： Paul Illegems , Klaas Wortel
发明人： Paul Illegems , Klaas Wortel
IPC分类号： G01R31/26 , H01L23/34 , H01L23/58
CPC分类号： H01L23/34 , H01L2924/0002 , H01L2924/00
摘要： In one embodiment, a plurality of pn-junctions are grouped into n(n-1)/2 pairs (where n is an integer greater than 1) and each pn-junction pair includes a first pn-junction coupled antiparallel to a second pn-junction. In addition, n access points are coupled to the plurality of pn-junctions, and through the n access points n-1 pn-junctions are simultaneously accessible. In another embodiment, an integrated circuit is coupled to the plurality of pn-junctions via the n access points. In one embodiment, the integrated circuit may be configured as a temperature measurement IC and the plurality of pn-junctions may be used as temperature sensors. In this embodiment, the temperature measurement IC may be configured to access the first pn-junction independently from the second pn-junction and may be configured to access n-1 pn-junctions simultaneously to perform temperature measurements.
摘要翻译：在一个实施例中，多个pn结被分组为n（n-1）/ 2对（其中n是大于1的整数），并且每个pn结对包括反向并联到第二pn的第一pn结交界处另外，n个接入点耦合到多个pn结，并且通过n个接入点，n-1个pn-junction可以同时访问。在另一个实施例中，集成电路经由n个接入点耦合到多个pn结。在一个实施例中，集成电路可以被配置为温度测量IC，并且多个pn结可以用作温度传感器。在该实施例中，温度测量IC可以被配置为独立于第二pn结访问第一pn结，并且可以被配置为同时访问n-1个pn结以执行温度测量。

6. 发明申请

US20050012554A1 EFFICIENT CLASS-G AMPLIFIER WITH WIDE OUTPUT VOLTAGE SWING 有权
标题翻译：具有宽输出电压开关的高效级别的放大器
公开(公告)号：US20050012554A1
公开(公告)日：2005-01-20
申请号：US10622051
申请日：2003-07-17
申请人： Thomas Somerville , Klaas Wortel
发明人： Thomas Somerville , Klaas Wortel
IPC分类号： H03F1/02 , H03F3/21 , H03F3/72 , H03F3/04
CPC分类号： H03F1/025 , H03F3/211 , H03F3/72
摘要： Various embodiments of methods and apparatus for an amplifier with wide output voltage swing are disclosed. The amplifier may include multiple output stages, each associated with a distinct supply voltage. Each output stage may contribute current to the output of the amplifier over a range of amplifier output voltages and these ranges may overlap. Each output stage may contribute current until the amplifier output voltage reaches the supply voltage associated with that output stage. The amplifier output may be as great as the largest supply voltage minus a drop equal to Rdson for an output transistor multiplied by the output current. In a CMOS implementation, this voltage drop may be approximately 0.15V. When the amplifier output voltage is close to the supply voltage associated with an output stage, both that output stage and the output stage associated with the next highest supply voltage may contribute to the amplifier output.
摘要翻译：公开了具有宽输出电压摆幅的放大器的方法和装置的各种实施例。放大器可以包括多个输出级，每个输出级与不同的电源电压相关联。每个输出级可以在放大器输出电压的范围内向放大器的输出提供电流，并且这些范围可以重叠。每个输出级可以贡献电流，直到放大器输出电压达到与该输出级相关联的电源电压。放大器输出可能与最大电源电压减去等于输出晶体管的输出电流的Rdson相等的输出电流。在CMOS实现中，该电压降可以是大约0.15V。当放大器输出电压接近与输出级相关的电源电压时，与下一个最高电源电压相关的输出级和输出级均可能有助于放大器输出。

7. 发明授权

US07415260B2 Current-mode direct conversion receiver 有权
标题翻译：电流模式直接转换接收器
公开(公告)号：US07415260B2
公开(公告)日：2008-08-19
申请号：US10795740
申请日：2004-03-08
申请人： Troy L. Stockstad , Klaas Wortel , Luis J. Briones , David Lovelace
发明人： Troy L. Stockstad , Klaas Wortel , Luis J. Briones , David Lovelace
IPC分类号： H04B1/00
CPC分类号： H04B1/30
摘要： A current-mode direct conversion RF receiver is presented. In one set of embodiments the RF receiver comprises a simple transconductor input stage to create a current-mode modulated signal from a voltage-mode modulated signal. A downconversion mixer may be coupled to the transconductor input stage via a low impedance current cascode stage, and may operate to create a set of current-mode quadrature baseband signals from the current-mode modulated signal. The downconversion mixer may be implemented with a transistor-switching network, which may be driven by a phase locked loop (PLL) with quadrature outputs. The set of current-mode quadrature baseband signals may be converted back to the voltage domain by a transimpedance filter, which may perform channel selection for the receiver. The transimpedance filter may additionally include a low frequency zero to remove DC offsets. The receiver may be implemented using CMOS design technologies and operated with minimal self-mixing effects, minimal DC offset in the baseband signal, and utilizing low voltages.
摘要翻译：提出了一种电流模式直接转换RF接收机。在一组实施例中，RF接收机包括简单的跨导体输入级，以从电压模式调制信号产生电流模式调制信号。下变频混频器可以经由低阻抗电流共源共栅级耦合到跨导体输入级，并且可以操作以从当前模式调制信号创建一组电流模式正交基带信号。下变频混频器可以用晶体管切换网络来实现，其可以由具有正交输出的锁相环（PLL）来驱动。电流模式正交基带信号的集合可以通过跨阻滤波器转换回电压域，该跨阻滤波器可以对接收机执行信道选择。跨阻滤波器可以另外包括用于去除DC偏移的低频零点。接收机可以使用CMOS设计技术来实现，并且以最小的自混合效应，基带信号中的最小DC偏移和利用低电压进行操作。

8. 发明申请

US20080166985A1 I/Q CALIBRATION FOR WALKING-IF ARCHITECTURES 有权
标题翻译： I / Q校准 - 如果建筑架构
公开(公告)号：US20080166985A1
公开(公告)日：2008-07-10
申请号：US11968644
申请日：2008-01-02
申请人： Klaas Wortel , Rainer Gaethke , Vincent K. Jones , James Gardner
发明人： Klaas Wortel , Rainer Gaethke , Vincent K. Jones , James Gardner
IPC分类号： H04B1/16 , H04B7/00
CPC分类号： H04L27/364 , H04L27/3863
摘要： Systems and methodologies are described that facilitate calibration techniques for a station in a wireless communication system that can be utilized to provide joint estimates for distortion introduced by in-phase and quadrature (I/Q) imbalance and mixing-product modulated images.
摘要翻译：描述了促进无线通信系统中的站的校准技术的系统和方法，其可以用于提供由同相和正交（I / Q）不平衡和混合产物调制图像引入的失真的联合估计。

9. 发明授权

US07043222B2 FSK modulator using IQ up-mixers and sinewave coded DACs 有权
标题翻译： FSK调制器使用IQ上变频器和正弦波编码DAC
公开(公告)号：US07043222B2
公开(公告)日：2006-05-09
申请号：US10653322
申请日：2003-09-02
申请人： Klaas Wortel , Luis J. Briones , Troy L. Stockstad
发明人： Klaas Wortel , Luis J. Briones , Troy L. Stockstad
IPC分类号： H04B1/10
CPC分类号： H04L27/12
摘要： A radio transmitter system designed using an FSK modulator with IQ up-mixers and sinewave coded digital-to-analog converters (DACs). The radio transmitter system may include a frequency shift keying (FSK) coding logic circuit coupled to the inputs of an IQ modulation and image reject up-mixer through a respective DAC and a respective low pass filter (LPF) for each the I and the Q channels. The FSK modulation scheme may employ sine and cosine signals for the I and Q channels, respectively, where the sine and cosine waves are directly coded into the DACs. The coded levels required by the DACs may be generated using current sources and may be Gray-coded. The output of the IQ modulation and image reject up-mixer may be connected to a power amplifier, which may be used to transmit the modulated RF signal via a loop antenna.
摘要翻译：无线电发射机系统使用具有IQ上变频器和正弦波编码的数模转换器（DAC）的FSK调制器设计。无线电发射机系统可以包括频移键控（FSK）编码逻辑电路，其通过相应的DAC和针对I和Q的每个的相应的低通滤波器（LPF）耦合到IQ调制和图像拒绝上混频器的输入频道 FSK调制方案可以分别将正弦和余弦信号用于I和Q通道，其中正弦和余弦波被直接编码到DAC中。 DAC所需的编码电平可以使用电流源生成，并且可以是灰色编码的。 IQ调制和图像拒绝上混频器的输出可以连接到功率放大器，功率放大器可以用于经由环形天线发送经调制的RF信号。

10. 发明授权

US06906587B2 Current controlled bridge amplifier 有权
标题翻译：电流控制桥式放大器
公开(公告)号：US06906587B2
公开(公告)日：2005-06-14
申请号：US10355859
申请日：2003-01-31
申请人： Klaas Wortel
发明人： Klaas Wortel
IPC分类号： H03F3/45
CPC分类号： H03F3/45237
摘要： An amplifier circuit. In one embodiment, the amplifier includes a first pair of transistors and a second pair of transistors. Each transistor in the amplifier includes a control terminal (e.g. a gate) as well as a first and second terminals. In one embodiment, the transistors are field effect transistors (FETs) and thus the first and second terminals may be either source or drain terminals. First terminals of each of the first pair of transistors may be coupled to a voltage source. The first terminal of each of the second pair of transistors is coupled to the second terminal of one of the first pair of transistors. A current source may be coupled between each of the second terminals and a voltage reference (e.g. ground plane).
摘要翻译：放大器电路。在一个实施例中，放大器包括第一对晶体管和第二对晶体管。放大器中的每个晶体管包括控制端（例如栅极）以及第一和第二端子。在一个实施例中，晶体管是场效应晶体管（FET），因此第一和第二端子可以是源极或漏极端子。第一对晶体管中的每一个的第一端子可以耦合到电压源。第二对晶体管中的每一个的第一端耦合到第一对晶体管之一的第二端。电流源可以耦合在每个第二端子和电压参考（例如接地平面）之间。

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