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21. 发明授权

US5164942A Antenna control for a wireless local area network station 失效
标题翻译：无线局域网网络的天线控制
公开(公告)号：US5164942A
公开(公告)日：1992-11-17
申请号：US633692
申请日：1990-12-24
申请人： Adriaan Kamerman , Hans van Driest
发明人： Adriaan Kamerman , Hans van Driest
IPC分类号： H04B7/08 , H04L12/28
CPC分类号： H04W74/085 , H04B7/0805
摘要： A local area network station (12) includes a transceiver (20) adapted to transmit and receive signals using electromagnetic radiation on a wireless communication link. The station (12) utilizes a CSMA/CD communications controller (22) in a CSMA/CA (collison avoidance) technique wherein deferred data frames are transmitted after a random number of backoff slots periods. A plurality of antennas (14, 16) is employed, with the antenna having the best receive conditions being selected for reception of a data frame. The antennas having a slotting control (200) which is synchronized with the backoff slotting to provide a short carrier detect time and hence high throughpout.

22. 发明授权

US4998261A Spread spectrum signal demodulator 失效
标题翻译：扩频信号解调器
公开(公告)号：US4998261A
公开(公告)日：1991-03-05
申请号：US450891
申请日：1989-12-14
申请人： Hans van Driest , Jacobus C. Haartsen , Bruce T. Tuch , Maarten Visee
发明人： Hans van Driest , Jacobus C. Haartsen , Bruce T. Tuch , Maarten Visee
IPC分类号： H04B1/707
CPC分类号： H04B1/7093 , H04B1/70712
摘要： In a digital data receiver (80) for demodulating a direct sequence spread spectrum differential phase shift keyed data signal, the signal is applied to the input transducer (140) of a SAW device (100) which has first and second output transducers (142, 144) spaced apart on the SAW substrate (130) so as to produce first and second output signals on output lines (102, 104), which are relatively delayed by a time corresponding to a symbol period. The output transducers are of identical construction and are matched to the spread spectrum code utilized in the data signal. Thus, a single SAW device (100) effects both correlation and delay. The output signals on the output lines (102, 104) are processed by a circuit including multipliers (106, 110) and a phase shifter (108) to produce output data signals representing the received data.

23. 发明授权

US4362997A Quadriphase differential demodulator 失效
标题翻译：四相差分解调器
公开(公告)号：US4362997A
公开(公告)日：1982-12-07
申请号：US217942
申请日：1980-12-18
申请人： Hans van Driest
发明人： Hans van Driest
IPC分类号： H04L27/22 , H04L20060101 , H04L27/18 , H04L27/227
CPC分类号： H04L27/2273
摘要： A method and apparatus for synchronizing a digital data demodulator to a received phase modulation carrier signal in which the carrier signal is phase shifted during each modulation period of the carrier to represent one of four pairs of binary bits or dibits. A first dibit clock is adjusted to the phase of a reference dibit clock whose output is used to synchronize the demodulator in establishing the location of the modulation period of the incoming carrier. In order to overcome errors found in the decoding of the carrier signal, the adjustment of the dibit clock is suppressed when the dibits 00 and 10 are being decoded. With this construction, it was found that the dibit clock may run out of synchronization if long strings of zero characters (dibits 00) are received. In order to solve this problem, a second dibit clock is employed which is adjusted on dibits 00. After a predetermined number of continuous 00 dibits have been decoded, the suppression of the adjustment to the first dibit clock is removed and the phase corrections applied to the second dibit clock are applied to the first dibit clock.
摘要翻译：一种用于将数字数据解调器同步到接收的相位调制载波信号的方法和装置，其中载波信号在载波的每个调制周期期间被相移以表示四对二进制位或双位中的一对。第一个双向时钟被调整到参考双位时钟的相位，其输出用于在解调器建立输入载波的调制周期的位置时同步解调器。为了克服在载波信号的解码中发现的错误，当双字节00和10被解码时，抑制了双向时钟的调整。利用这种结构，发现如果接收到长字符串为零字符（双位00），则双向时钟可能会失去同步。为了解决这个问题，采用在二进制数00上调整的第二个双向时钟。在已经解码了预定数量的连续00个双位之后，去除对第一个双向时钟的调整的抑制，并将相位校正应用于第二个双向时钟被施加到第一个双向时钟。

24. 发明授权

US09166602B2 Transceiver 有权
标题翻译：收发器
公开(公告)号：US09166602B2
公开(公告)日：2015-10-20
申请号：US13636350
申请日：2010-03-24
申请人： Hans Van Driest
发明人： Hans Van Driest
IPC分类号： H04B1/40 , H03L7/06 , H03L7/091
CPC分类号： H03L7/06 , H03L7/091
摘要： A transceiver 1 includes a frequency synthesizer 2 configured to generate an output signal 3 for use as a carrier signal for transmission and/or a signal with a channel frequency for reception, wherein the frequency synthesizer is a sub-sampling based frequency locked loop frequency synthesizer. The combination of a FLL and sub-sampling allows to obtain a sub-sample based locked loop with a closed loop response similar to a PLL but with improved settling time and improved suppression of high frequency components of the quantization noise due to the sampling process. The transceiver allows to obtain a frequency synthesizer with improved characteristics with respect to at least one of power consumption, locking characteristic, design optimization characteristics compared to non-sub-sampling PLL based frequency synthesizers.
摘要翻译：收发器1包括频率合成器2，其被配置为产生用作传输的载波信号的输出信号3和/或具有用于接收的信道频率的信号，其中频率合成器是基于子采样的频率锁频环频率合成器。 FLL和子采样的组合允许获得类似于PLL的闭环响应的基于子采样的锁定环路，但是由于采样过程，具有改善的建立时间和改进的对量化噪声的高频分量的抑制。相对于基于非子采样PLL的频率合成器，收发器允许获得关于功耗，锁定特性，设计优化特性中的至少一个的改进特性的频率合成器。

25. 发明授权

US5754126A Palm mouse 失效
标题翻译：棕榈鼠标
公开(公告)号：US5754126A
公开(公告)日：1998-05-19
申请号：US746182
申请日：1996-11-06
申请人： Johan O. Hilbrink , Donald W. Carr , Francis J. McFadden , Hans van Driest
发明人： Johan O. Hilbrink , Donald W. Carr , Francis J. McFadden , Hans van Driest
IPC分类号： G06F3/033 , G06F3/038 , H04B10/10 , H03M11/00 , H04B10/00
CPC分类号： H04B10/114
摘要： A wireless pointing device which sits in the palm of a user's hand. The palm mouse includes a first portion which includes a ball for generating pointing signals, a control circuit for processing the pointing signals, a top section having a top surface which is generally ovoid in shape, and a bottom section having a bottom surface which is generally flat in shape and which contains an aperture through which the ball protrudes. A second portion includes a J-shaped flexible member attached to the first portion for cupping the hand. A communication circuit includes a transmitter within the first portion, a first antenna within the J-shaped member, a power supply within the first portion, a receiver coupled to the computer, and a second antenna coupled to the receiver. A preferred embodiment of the palm mouse has at least one switch on the J-shaped member, which is activated by the user's thumb.
摘要翻译：位于用户手掌中的无线指示装置。手掌鼠标包括第一部分，其包括用于产生指向信号的球，用于处理指向信号的控制电路，具有大致卵形形状的顶表面的顶部部分和具有通常为卵形的底部表面的底部部分平坦的形状并且包含一个孔，球通过该孔突出。第二部分包括附接到第一部分的用于拔罐的J形柔性构件。通信电路包括在第一部分内的发射器，J形部件内的第一天线，第一部分内的电源，耦合到计算机的接收器和耦合到接收器的第二天线。手掌鼠标的优选实施例具有至少一个由用户的拇指激活的J形构件上的开关。

26. 发明授权

US5220564A Transmission control for a wireless local area network station 失效
标题翻译：无线局域网网络的传输控制
公开(公告)号：US5220564A
公开(公告)日：1993-06-15
申请号：US633699
申请日：1990-12-24
申请人： Bruce T. Tuch , Hans van Driest
发明人： Bruce T. Tuch , Hans van Driest
IPC分类号： H04B7/005 , H04L12/28
CPC分类号： H04W52/10
摘要： In a local area network station (12) for a wireless LAN, a threshold level circuit (62) includes a register (134) which stores a threshold value. The station receiver (42) monitors the transmission channel and provides a receive level signal indicative of the signal level received. Transmission of a data frame by the station transmitter (46) is permitted or deferred according as the receive level signal value is below or above the threshold level, regardless of whether or not the received signal derives from a transmission by a station in the receiving station's own LAN. The threshold is dynamically updated whenever the station (12) receives a data frame from its own LAN. An improved utilization of the wireless transmission channel is achieved.

27. 发明授权

US5131006A Carrier detection for a wireless local area network 失效
标题翻译：无线局域网的载波检测
公开(公告)号：US5131006A
公开(公告)日：1992-07-14
申请号：US633568
申请日：1990-12-24
申请人： Adriaan Kamerman , Hans van Driest
发明人： Adriaan Kamerman , Hans van Driest
IPC分类号： H04B1/707 , H04B7/08
CPC分类号： H04B1/709 , H04B1/707 , H04B7/0805
摘要： A local area network (10) utilizes a wireless transmission link and has network stations (12) each having two differently polarized antennas (14, 16). Data transmission utilizes a spread spectrum code and in the receiver, correlator outputs are utilized in an integrator and registers circuit (54) to provide correlator output sample values integrated over a plurality of symbol intervals. These values are stored in registers (156) the contents of which are utilized to determine a peak value and a total value which are applied to a spike quality determination circuit (78) including a look-up table (200). The resultant spike quality output value represents the quality of the received signal and is utilized for carrier detection and for antenna selection.

28. 发明授权

US5128960A Clock recovery for a wireless local area network station 失效
标题翻译：无线本地区网络站的时钟恢复
公开(公告)号：US5128960A
公开(公告)日：1992-07-07
申请号：US633697
申请日：1990-12-24
申请人： Hans van Driest , Jan Boer
发明人： Hans van Driest , Jan Boer
IPC分类号： H04B1/707
CPC分类号： H04B1/707 , H04B1/709
摘要： A local area network station for receiving data symbols encoded in a spread spectrum code and transmitted over a wireless channel includes in-phase and quadrature correlators (42, 44) the output signals of which are used to address a look-up table (50) for conversion to amplitude and phase sample signals. Corresponding amplitude sample signals are integrated and stored in a plurality of registers (96) and for each symbol, the register (96) storing the maximum value is ascertained to identify the associated sample number, which is stored in a sample number register (160). This sample number is utilized to determine the time of a symbol clock signal (RXCLK) used for clocking the received data.

29. 发明授权

US5049766A Delay measuring circuit 失效
标题翻译：延时测量电路
公开(公告)号：US5049766A
公开(公告)日：1991-09-17
申请号：US493593
申请日：1990-03-15
申请人： Hans van Driest , Hendrik van Bokhorst , Richard Kruithof
发明人： Hans van Driest , Hendrik van Bokhorst , Richard Kruithof
IPC分类号： G01R25/08 , G01R29/027
CPC分类号： G01R25/08 , G01R29/0273
摘要： In a delay measuring circuit (10), an input clock signal (13) is applied to a multitapped delay line (14), the output taps of which are connected to a switch (26) which selects one of the switch inputs for connection to a phase comparator (34) which compares the input clock signal (13), delayed in a delay device (38) to compensate for the delay inherent in the switch (26), with the output of the switch (26). The input clock signal is also applied to a counter (22), and when the phase comparator (34) detects a phase match, the counter value is stored in a latch (32), the counter (22) is reset to a predetermined value, and the counting procedure resumed. The latch (32) thus always stores a value dependent on the delay of an individual delay cell (16-l to 16-N). This stored value can be applied to various uses, such as in a timing watchdog circuit or for generating accurate delays.

30. 发明授权

US5003562A Digital phase lock loop decoder 失效
标题翻译：数字锁相环解码器
公开(公告)号：US5003562A
公开(公告)日：1991-03-26
申请号：US493546
申请日：1990-03-14
申请人： Hans van Driest , Hendrik van Bokhorst , Richard Kruithof
发明人： Hans van Driest , Hendrik van Bokhorst , Richard Kruithof
IPC分类号： H03M5/12 , H04L7/033 , H04L7/04
CPC分类号： H04L7/0331 , H03M5/12 , H04L7/046
摘要： A digital phase lock loop decoder for use in decoding Manchester encoded data operates at an internal clock speed having a speed equal to the data rate of the encoded data. The decoder includes a first sampling circuit for providing signals based on the clock speed of the encoded data, a delay circuit for generating delayed clock signals relative to the clock speed of the encoded data, a second sampling circuit for sampling the encoded data based on the delayed clock signals, a feedback circuit for generating clock signals whose phase corresponds with the phase of the delayed clock signals and a storage for outputting decoded data signals corresponding to the encoded data utilizing the delayed clock signals.

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