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1. 发明申请

US20190253286A1 CONTINUOUS-TIME SAMPLER CIRCUITS 审中-公开
公开(公告)号：US20190253286A1
公开(公告)日：2019-08-15
申请号：US15896355
申请日：2018-02-14
申请人： Analog Devices Global Unlimited Company
发明人： Hajime Shibata , Brian Holford , Trevor Clifford Caldwell , Siddharth Devarajan
IPC分类号： H04L25/06 , H03M1/12 , H04L27/156 , H04L12/26
CPC分类号： H04L25/069 , G01R13/34 , G11C27/02 , H03M1/1245 , H03M1/1255 , H04L27/1563 , H04L43/0852
摘要： A continuous-time sampler has series-connected delay lines with intermediate output taps between the delay lines. Signal from an output tap can be buffered by an optional voltage buffer for performance. A corresponding controlled switch is provided with each output tap to connect the output tap to an output of the continuous-time sampler. The delay lines store a continuous-time input signal waveform within the propagation delays. Controlling the switches corresponding to the output taps with pulses that match the propagation delays can yield a same input signal value at the output. The continuous-time sampler effectively “holds” or provides the input signal value at the output for further processing without requiring switched-capacitor circuits that sample the input signal value onto some capacitor. In some cases, the continuous-time sampler can be a recursively-connected delay line. The continuous-time sampler can be used as the front end sampler in a variety of analog-to-digital converters.

2. 发明申请

US20180263037A1 DYNAMIC SHARING OF OFDMA AND ATDMA SIGNALS 审中-公开
公开(公告)号：US20180263037A1
公开(公告)日：2018-09-13
申请号：US15728916
申请日：2017-10-10
申请人： Casa Systems, Inc.
发明人： Tao Yu , Douglas Keith Rosich , Weidong Chen
IPC分类号： H04W72/04 , H04L27/00 , H04J4/00 , H04L27/156 , H04L5/00
CPC分类号： H04W72/0453 , H04B7/2615 , H04J4/00 , H04L5/0007 , H04L25/02 , H04L27/0008 , H04L27/0014 , H04L27/1563 , H04L27/26 , H04L27/38 , H04W72/0446
摘要： The techniques described herein relate to methods, apparatus, and computer readable media configured to decode modulated data. A modulated signal is received. A format of the modulated signal is determined, wherein the format can include a first format comprising a first type of modulated signal, or a second format comprising the first type of modulated signal and a second type of modulated signal that is different than the first type. The modulated signal is decoded by determining a frequency shift amount based on the format of the modulated signal, shifting a frequency band of the first type of modulated signal from an original position to a shifted position, thereby shifting a center frequency of the first type of modulated signal by the frequency shift amount, and filtering, based on the format of the modulated signal, signals outside of the frequency band of the shifted first type of modulated signal.

3. 发明申请

US20150108216A1 INFORMATION REPRODUCTION DEVICE AND INFORMATION REPRODUCTION METHOD 有权
标题翻译：信息再现设备和信息再现方法
公开(公告)号：US20150108216A1
公开(公告)日：2015-04-23
申请号：US14369806
申请日：2013-03-27
申请人： NIDEC SANKYO CORPORATION
发明人： Shigeo Nakajima , Yoichi Isono , Katsuhisa Higashi
IPC分类号： G06K7/08
CPC分类号： G06K7/084 , G11B5/09 , G11B20/10009 , G11B20/14 , G11B20/1403 , G11B20/1419 , H04L25/062 , H04L27/1563
摘要： An information reproduction device for use with a magnetic recording medium storing information may include an analog/digital (AD) converter structured to convert an analog signal, which is reproduced from the information recorded in the magnetic recording medium, into a digital signal; a peak detecting unit structured to detect a peak point of the reproduced signal, from the digital signal, according to a threshold as a judgment level in accordance with an output of the AD converter; and an information generating unit for generating structured to generate a rectangular waveform signal of the reproduced signal, waveform-shaped according to interval information of peak points detected by the peak detecting unit.
摘要翻译：与存储信息的磁记录介质一起使用的信息再现装置可以包括将从记录在磁记录介质中的信息再现的模拟信号转换为数字信号的模拟/数字（AD）转换器; 峰值检测单元，被构造成根据AD转换器的输出，根据阈值作为判断电平从数字信号中检测再现信号的峰值点; 以及信息生成单元，用于生成结构化以根据峰值检测单元检测到的峰值点的间隔信息产生波形形状的再现信号的矩形波形信号。

4. 发明申请

US20150063434A1 TRANSPORT OF AN ANALOG SIGNAL ACROSS AN ISOLATION BARRIER 有权
标题翻译：通过隔离障碍物传输模拟信号
公开(公告)号：US20150063434A1
公开(公告)日：2015-03-05
申请号：US14266153
申请日：2014-04-30
申请人： Silicon Laboratories Inc.
发明人： Jeffrey L. Sonntag , Douglas R. Frey , Michael J. Mills , András Vince Horvath , Anantha Nag Nemmani
IPC分类号： H04L27/156
CPC分类号： H04L27/1563 , H04L25/0266 , H04L25/4902
摘要： An analog signal is transported across an isolation channel using edge modulation/demodulation of a pulse width modulated (PWM) signal. An edge modulator is responsive to rising edges of the PWM signal to generate first pulses having a first predetermined pulse width and is responsive to receipt of falling edges of the PWM signal to generate second pulses having a second predetermined pulse width with the same polarity as the first pulses. On the opposite side of the isolation channel an edge demodulating circuit recreates the PWM signal using the first and second pulses. The rise and falling edges of the PWM signals can be distinguished based on the pulse width of the first and second pulses. A second order pulse width modulator may be used to generate the PWM signal.
摘要翻译：使用脉冲宽度调制（PWM）信号的边缘调制/解调，模拟信号通过隔离通道传输。边缘调制器响应于PWM信号的上升沿以产生具有第一预定脉冲宽度的第一脉冲，并且响应于接收到PWM信号的下降沿以产生具有与第二预定脉冲宽度相同极性的第二脉冲第一脉冲。在隔离通道的相反侧，边缘解调电路使用第一和第二脉冲重新创建PWM信号。可以基于第一和第二脉冲的脉冲宽度区分PWM信号的上升沿和下降沿。可以使用二阶脉冲宽度调制器来产生PWM信号。

5. 发明授权

US08937933B2 Method and apparatus for transmitting PLCP frame in wireless local area network system 有权
标题翻译：在无线局域网系统中传输PLCP帧的方法和装置
公开(公告)号：US08937933B2
公开(公告)日：2015-01-20
申请号：US13943572
申请日：2013-07-16
申请人： LG Electronics Inc.
发明人： Dae Won Lee , Dong Wook Roh , Byeong Woo Kang , Yong Ho Seok , Yu Jin Noh , Bong Hoe Kim
IPC分类号： H04W4/00 , H04W84/12 , H04L27/26 , H04L1/00 , H04W28/06
CPC分类号： H04L27/261 , H03M5/12 , H04B7/0413 , H04L1/0041 , H04L1/0061 , H04L25/4904 , H04L27/14 , H04L27/144 , H04L27/148 , H04L27/1563 , H04L27/22 , H04L27/2273 , H04L27/2331 , H04L27/2332 , H04L27/2613 , H04L27/2647 , H04L2027/0028 , H04N5/4401 , H04Q1/46 , H04W28/06 , H04W84/12
摘要： A method of transmitting a Physical Layer Convergence Procedure (PLCP) frame in a Very High Throughput (VHT) Wireless Local Area Network (WLAN) system includes generating a MAC Protocol Data Unit (MPDU) to be transmitted to a destination station (STA), generating a PLCP Protocol Data Unit (PPDU) by adding a PLCP header, including an L-SIG field containing control information for a legacy STA and a VHT-SIG field containing control information for a VHT STA, to the MPDU, and transmitting the PPDU to the destination STA. A constellation applied to some of Orthogonal Frequency Division Multiplex (OFDM) symbols of the VHT-SIG field is obtained by rotating a constellation applied to an OFDM symbol of the L-SIG field.
摘要翻译：一种在非常高吞吐量（VHT）无线局域网（WLAN）系统中发送物理层汇聚程序（PLCP）帧的方法包括生成要发送到目的站（STA）的MAC协议数据单元（MPDU）通过将包含包含用于传统STA的控制信息的L-SIG字段和包含用于VHT STA的控制信息的VHT-SIG字段的L-SIG字段的PLCP头添加到MPDU来生成PLCP协议数据单元（PPDU），以及发送PPDU 到目的地STA。通过旋转施加到L-SIG字段的OFDM符号的星座来获得应用于VHT-SIG字段的一些正交频分复用（OFDM）符号的星座。

6. 发明申请

US20140003472A1 DIGITAL FREQUENCY DEMODULATOR WITH LOW POWER CONSUMPTION AND RELATED SYSTEM AND METHOD 审中-公开
标题翻译：具有低功耗的数字频率解调器及相关系统和方法
公开(公告)号：US20140003472A1
公开(公告)日：2014-01-02
申请号：US13536835
申请日：2012-06-28
申请人： Darrell Lee Ash
发明人： Darrell Lee Ash
IPC分类号： H04L27/06 , H04B3/36 , H04B1/38
CPC分类号： H04L27/1563
摘要： An apparatus includes a frequency counter configured to receive an input signal containing pulses and to output a count value identifying a number of pulses in the input signal during a specified time period. The specified time period encompasses multiple cycles of the input signal. The apparatus also includes a comparator configured to receive the count value, compare the count value to a second value, and provide an output signal based on the comparison. The apparatus further includes a data latch configured to latch the output signal, where the latched value of the output signal represents a demodulated data value. The comparator could be configured to compare the count value to a fixed value associated with a desired frequency of the input signal. The comparator could also be configured to compare the count value in one specified time period to a stored count value from another specified time period.
摘要翻译：一种装置，包括配置成接收包含脉冲的输入信号的频率计数器，并且在指定的时间段期间输出识别输入信号中的脉冲数的计数值。指定的时间段包含输入信号的多个周期。该装置还包括比较器，被配置为接收计数值，将计数值与第二值进行比较，并且基于该比较来提供输出信号。该装置还包括数据锁存器，配置为锁存输出信号，其中输出信号的锁存值表示解调数据值。比较器可以被配置为将计数值与输入信号的期望频率相关联的固定值进行比较。比较器也可以被配置为将一个指定时间段中的计数值与另一指定时间段的存储的计数值进行比较。

7. 发明申请

US20120044017A1 DEMODULATOR AND SYSTEM FOR TRANSMITTING MODULATED INFORMATION, IN PARTICULAR FOR RADIOFREQUENCY IDENTIFICATION TAGS 有权
标题翻译：用于发送调制信息的解调器和系统，特别是用于无线电标识标签
公开(公告)号：US20120044017A1
公开(公告)日：2012-02-23
申请号：US13266826
申请日：2010-05-04
申请人： David Lachartre
发明人： David Lachartre
IPC分类号： H03D3/22
CPC分类号： H04L27/1563 , H04L27/2331 , H04L27/2335
摘要： A demodulator including a delay line adapted for receiving an input signal at an input frequency, phase or frequency modulated by symbols with a duration equal to a period of the input signal or very close to that period. The delay line has Nd outputs producing Nd signals at the input frequency but with Nd different delays offset by ΔT relative to one another, Nd being an integer number greater than or equal to 1. The demodulator also includes a register of Nd latches each receiving a respective output of the delay line and a clock signal which is the input signal, in order to store the state of the outputs of the delay lines at the end of a period of the clock signal in the register . The content of the register represents a value of an input signal modulation symbol.
摘要翻译：一种包括延迟线的解调器，其适于接收输入频率的输入信号，相位或频率由具有等于输入信号的周期或非常接近该周期的周期的符号的符号调制。延迟线具有在输入频率处产生Nd信号的Nd输出，但是Nd不同的延迟偏移＆Dgr; T相对于彼此，Nd是大于或等于1的整数。解调器还包括每个Nd锁存器的寄存器接收延迟线的相应输出和作为输入信号的时钟信号，以便在时钟信号的周期结束时将延迟线的输出的状态存储在寄存器中。寄存器的内容表示输入信号调制符号的值。

8. 发明授权

US07804916B2 Detector for detecting a frequency-shift keying signal by digital processing 有权
标题翻译：用于通过数字处理检测频移键控信号的检测器
公开(公告)号：US07804916B2
公开(公告)日：2010-09-28
申请号：US11645566
申请日：2006-12-27
申请人： Hiroji Akahori
发明人： Hiroji Akahori
IPC分类号： H03C1/52 , H04L27/00 , H04L7/00 , H03K9/00 , H04B3/20
CPC分类号： H04L27/1563
摘要： A frequency-shift keying (FSK) signal detector includes a binarizing circuit for receiving an FSK signal and expressing amplitude of the FSK signal in binary; a correlator for receiving the FSK signal expressed in binary and acquiring a correlation of the FSK signal; and an arithmetic unit for performing an arithmetic operation on the output of the correlator to detect and output the FSK signal. The correlator includes plural stages of shift register for sequentially shifting the FSK signal in response to a clock signal; a correlation filter for obtaining the correlation by a correlation signal sequence and a window function signal sequence which obtain a correlation value at one of two frequency components generated by frequency-shift keying; and another correlation filter for obtaining the correlation by a correlation signal sequence and a window function signal sequence which obtain a correlation value at the other of the two frequency components.
摘要翻译：频移键控（FSK）信号检测器包括二进制电路，用于接收FSK信号并以二进制表示FSK信号的幅度; 用于接收以二进制表示的FSK信号并获取FSK信号的相关性的相关器; 以及用于对相关器的输出执行算术运算以检测和输出FSK信号的算术单元。相关器包括用于响应于时钟信号顺序移位FSK信号的多级移位寄存器; 相关滤波器，用于通过相关信号序列获得相关性，以及窗函数信号序列，其通过频移键控产生的两个频率分量之一获得相关值; 以及用于通过相关信号序列获得相关性的相关滤波器和获得两个频率分量中的另一个的相关值的窗函数信号序列。

9. 发明授权

US07590209B2 Method and computer program for identifying a transition in a phase-shift keying or frequency-shift keying signal 失效
标题翻译：用于识别相移键控或频移键控信号中的转换的方法和计算机程序
公开(公告)号：US07590209B2
公开(公告)日：2009-09-15
申请号：US11323835
申请日：2005-12-30
申请人： Stephen Ha
发明人： Stephen Ha
IPC分类号： H04L7/00
CPC分类号： H04L27/2337 , H04L27/144 , H04L27/1563
摘要： A system for identifying phase transitions in phase-shift keying signals and frequency transitions in frequency-shift keying signals broadly comprises a memory and a computing element capable of: selecting a portion of the signal to analyze, wherein the signal comprises a plurality of data samples; applying a transform to the signal to obtain a frequency spectrum; determining a maximum frequency spectrum corresponding to a carrier frequency; determining a starting approximation value of a slope of the phase transition; calculating a bounded limit of slopes within which to search for the phase transition; selecting a plurality of lines, calculating a sum for the data samples associated with each of the lines; and based on the sum for the data samples, identifying a line that corresponds to a location of the phase transition.
摘要翻译：用于识别相移键控信号和频移键控信号中的频率转换的相变的系统广泛地包括存储器和能够：选择要分析的信号的一部分的计算元件，其中所述信号包括多个数据样本 ; 对信号进行变换以获得频谱; 确定对应于载波频率的最大频谱; 确定相变斜率的起始近似值; 计算其中搜索相变的斜率的有界极限; 选择多条线，计算与每条线相关联的数据样本的和; 并且基于数据样本的总和，识别与相变位置相对应的线。

10. 发明授权

US07551669B2 System for multiplexing independent signals 有权
标题翻译：独立信号复用系统
公开(公告)号：US07551669B2
公开(公告)日：2009-06-23
申请号：US11235698
申请日：2005-09-26
申请人： John Dicky
发明人： John Dicky
IPC分类号： H03K7/08
CPC分类号： H04L27/1563 , H04J7/00 , H04L25/4902
摘要： A system for multiplexing multiple independent signals includes a transmitter, interconnecting medium, and a receiver. The transmitter encodes a waveform with first and second pieces of information for transmission across the interconnecting medium. The receiver determines the first and second pieces of information using the duty cycle and frequency of the waveform.
摘要翻译：用于复用多个独立信号的系统包括发射机，互连介质和接收机。发射机对具有第一和第二信息的波形进行编码，以便在互连介质上传输。接收机使用波形的占空比和频率确定第一和第二信息。

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