公开(公告)号：US11888654B2

公开(公告)日：2024-01-30

申请号：US17898851

申请日：2022-08-30

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jueon Kim ,  Taehyoung Kim ,  Seungjin Park ,  Jihwan Hyun ,  Myoungbo Kwak ,  Junghwan Choi

IPC: H04L25/03 ,  H04L27/06 ,  H03K21/08 ,  H03K9/02 ,  H04B17/21 ,  H03K5/24 ,  G01R31/317

CPC classification number: H04L25/03006 ,  G01R31/31703 ,  H03K5/24 ,  H03K9/02 ,  H03K21/08 ,  H04B17/21 ,  H04L27/06

Abstract: An offset detector circuit includes a digital signal register storing M unit digital signals received in latest M signal periods, M being a natural number, among digital signals generated based on a single-ended PAM-N signal, N being an odd number, a comparator outputting a comparison signal of a pair of signals included in differential signals generated from a differential signal generator based on the single-ended PAM-N signal, a comparison result register storing M unit comparison signals corresponding to the latest M signal periods among the comparison signals, a pattern detector outputting a detection signal when the M unit digital signals match a predetermined signal pattern, and an offset checker checking patterns of the M unit comparison signals in response to the detection signal, and outputting an offset detection signal when the patterns of the M unit comparison signals match a predetermined offset pattern.

公开(公告)号：US10461969B2

公开(公告)日：2019-10-29

申请号：US15957737

申请日：2018-04-19

Applicant: Rambus Inc.

Inventor： Nanyan Wang

IPC: H03K7/02 ,  H03K9/02 ,  H04L25/06 ,  H04L5/00 ,  H04L25/49 ,  H04L27/00

Abstract: In a PAM-N receiver, sampler reference levels, DC offset and AFE gain may be jointly adapted to achieve optimal or near-optimal boundaries for the symbol decisions of the PAM-N signal. For reference level adaptation, the hamming distances between two consecutive data samples and their in-between edge sample are evaluated. Reference levels for symbol decisions are adjusted accordingly such that on a data transition, an edge sample has on average, equal hamming distance to its adjacent data samples. DC offset may be compensated to ensure detectable data transitions for reference level adaptation. AFE gains may be jointly adapted with sampler reference levels such that the difference between a reference level and a pre-determined target voltage is minimized.

公开(公告)号：US08964917B2

公开(公告)日：2015-02-24

申请号：US14102083

申请日：2013-12-10

Applicant: Realtek Semiconductor Corporation

Inventor： Sheng-Fu Chuang ,  Liang-Wei Huang ,  Ching-Yao Su ,  Chun-Hung Liu ,  Hsuan-Ting Ho ,  Cheng-Han Lee

IPC: H03K7/02 ,  H03K9/02 ,  H04L25/497 ,  H04L25/03 ,  H04L25/49

CPC classification number: H04L25/4975 ,  H04L25/03019 ,  H04L25/4917

Abstract: The present invention discloses a signal transmission device performing compensation by filtering characteristics for generating a transmission signal according to a pulse amplitude modulation signal. The signal transmission device comprises: a filtering characteristic compensation circuit for generating a compensation signal according to the pulse amplitude modulation signal and a filtering function; a filter coupled to the filtering characteristic compensation circuit for generating a filtered signal through filtering the compensation signal according to the aforementioned filtering function; and an analog front-end circuit for generating the transmission signal according to the filtered signal.

Abstract translation: 本发明公开了一种信号传输装置，根据脉冲幅度调制信号，通过滤波特性进行补偿，以生成发送信号。 信号传输装置包括：滤波特性补偿电路，用于根据脉冲幅度调制信号和滤波函数产生补偿信号; 滤波器，耦合到滤波特性补偿电路，用于根据上述滤波函数对补偿信号进行滤波来产生滤波信号; 以及用于根据滤波信号产生发送信号的模拟前端电路。

公开(公告)号：US08532831B2

公开(公告)日：2013-09-10

申请号：US13570139

申请日：2012-08-08

Applicant: Timothy J. Crist

Inventor： Timothy J. Crist

IPC: G05D7/00 ,  A01G25/00 ,  H04B3/00 ,  H04L25/00 ,  H04L7/00 ,  H03C5/00 ,  H03K7/02 ,  H03K9/02

CPC classification number: A01G25/16 ,  Y02A40/238

Abstract: An irrigation control device having a modulator that modulates data onto an alternating power signal by distorting amplitude of a first leading portion of selected cycles of the alternating power signal, and permit effectively a full amplitude of the alternating power signal on a following portion of the selected cycles, wherein the first leading portion and the following portion are either both on a high side of a cycle or both on a low side of a cycle of the alternating power signal. The irrigation control device further includes an interface configured to couple the modulator to a multi-wire interface coupled to a plurality of irrigation devices to permit the alternating power signal to be applied to the multi-wire interface.

Abstract translation: 一种具有调制器的灌溉控制装置，其通过使交流功率信号的选定周期的第一引导部分的振幅失真来调制数据到交流功率信号，并且有效地在所选择的后续部分上的交变功率信号的全幅度 循环，其中第一引导部分和后续部分既在一个周期的高侧，也可以在交流功率信号的一个周期的低侧两者。 灌溉控制装置还包括被配置为将调制器耦合到耦合到多个冲洗装置的多线接口以允许将交流功率信号施加到多线接口的接口。

公开(公告)号：US07609109B2

公开(公告)日：2009-10-27

申请号：US11688121

申请日：2007-03-19

Applicant: Shigeru Arisawa

Inventor： Shigeru Arisawa

IPC: H03D1/10 ,  H03K9/00 ,  H03K9/02

CPC classification number: G06K7/0008 ,  G06K19/0723 ,  H03C1/08 ,  H03C1/14 ,  H03C1/36 ,  H03F3/72 ,  H03F2200/327 ,  H03F2203/7215 ,  H03K7/02 ,  H04L27/04 ,  H04L27/06

Abstract: In a contactless IC card system, a modulating circuit manufactured in an IC form is operable at a high power efficiency. The demodulating apparatus is configured to include: signal processing means for producing first and second input signals; first clamping circuit for clamping said first input signal; second clamping circuit for clamping said second input signal; first band limiting means for removing a component of said first input signal from an output signal of said first clamping circuit; second band limiting means for removing a component of said second input signal from an output signal of said second clamping circuit; and calculating means for adding, or averaging an output signal of said first band limiting means and an output signal of said second band limiting means.

Abstract translation: 在非接触IC卡系统中，以IC形式制造的调制电路以高功率效率工作。 解调装置被配置为包括：信号处理装置，用于产生第一和第二输入信号; 用于钳位所述第一输入信号的第一钳位电路; 用于钳位所述第二输入信号的第二钳位电路; 第一频带限制装置，用于从所述第一钳位电路的输出信号中去除所述第一输入信号的分量; 第二频带限制装置，用于从所述第二钳位电路的输出信号中去除所述第二输入信号的分量; 以及用于将所述第一频带限制装置的输出信号和所述第二频带限制装置的输出信号相加或平均的计算装置。

公开(公告)号：US20090189688A1

公开(公告)日：2009-07-30

申请号：US12182612

申请日：2008-07-30

Applicant: Olivier Nehrig ,  Carlo Peschke ,  Ernst Muellner ,  Adolf Baumann ,  Jens Graul

Inventor： Olivier Nehrig ,  Carlo Peschke ,  Ernst Muellner ,  Adolf Baumann ,  Jens Graul

IPC: H03K9/02

CPC classification number: H04L27/06 ,  G06K19/0723 ,  H03D1/18 ,  H03K5/082

Abstract: An ASK demodulator for use in an RFID transponder having a limiter circuit associated with the antenna circuit and converting the ASK antenna fieldstrength modulation into an ASK limiter current modulation by limiting the antenna voltage to a fixed value and thereby causing the limiter current to be substantially proportional to the ASK antenna field strength, and a current discriminator circuit that discriminates the ASK limiter current modulation. By converting the fieldstrength modulation into a proportional limiter current and discriminating that limiter current, a linear relationship and a stable demodulator sensitivity are achieved. The current discrimination can be made accurately under low-voltage conditions.

Abstract translation: 一种用于RFID应答器的ASK解调器，其具有与天线电路相关联的限幅器电路，并将ASK天线场强调制转换为ASK限幅器电流调制，将天线电压限制为固定值，从而使限幅器电流基本成比例 到ASK天线场强，以及电流鉴别器电路，其鉴别ASK限幅器电流调制。 通过将场强调制转换成比例限幅电流并识别限幅器电流，实现线性关系和稳定的解调器灵敏度。 在低电压条件下可以准确地进行电流鉴别。

公开(公告)号：US07164722B2

公开(公告)日：2007-01-16

申请号：US10216528

申请日：2002-08-09

Applicant: Kazuhisa Takamura

Inventor： Kazuhisa Takamura

IPC: H03K7/08 ,  H03K8/08 ,  H03K7/02 ,  H03K9/02 ,  H03K7/04 ,  H03G1/00

CPC classification number: H04B1/7172 ,  H04B1/719

Abstract: A radio communications system in which a desired signal can be accurately discriminated from interfering signals, even when signals from a plurality of transmitters are received simultaneously, in which a transmitter communicates information using signals that are repeated over predetermined periods. A pulse generator generates pulses having a predetermined repetition period based on an information bit to be communicated, and the pulses generated by the pulse generator are transmitted. A pulse amplitude altering unit controls the amplitude of the pulses to be transmitted in accordance with a predefined pattern under the control of a control unit.

Abstract translation: 即使当来自多个发射机的信号被同时接收时，发射机使用在预定周期内重复的信号来传送信息的无线电通信系统，其中所期望的信号可以被准确地与干扰信号区分开。 脉冲发生器基于要传送的信息位产生具有预定重复周期的脉冲，并且发送由脉冲发生器产生的脉冲。 脉冲幅度改变单元在控制单元的控制下根据预定义的模式控制要发送的脉冲的幅度。

公开(公告)号：US20050220232A1

公开(公告)日：2005-10-06

申请号：US10815887

申请日：2004-03-31

Applicant: Mika Kunnari ,  Juha Nurmi ,  Kaj Saarinen

Inventor： Mika Kunnari ,  Juha Nurmi ,  Kaj Saarinen

IPC: H03K7/02 ,  H03K9/02 ,  H04L25/49

CPC classification number: H04L25/4923

Abstract: A mobile station (10) includes a plurality of sub-assemblies coupled together by a plurality of data communication buses (22) connected to ports (20). At least one port includes a Multi-level Analog Signaling (MAS) circuit arrangement that includes a transmitter to encode data bits represented by multi-level analog signals. A data communications bus that couples the transmitter to a receiver in another port includes at least two multi-level, possibly differential signal buses for conveying the encoded data bits such that, on each multi-level signal bus, during each data bit period the signal level is required to change from a first signal level to a second, different signal level. The transmitter indicates a data boundary, such as the beginning or the end of multi-bit frame, to the receiver by holding one of the multi-level signal buses of the at least two signal buses at the same level for at least two consecutive bit periods.

Abstract translation: 移动台（10）包括通过连接到端口（20）的多个数据通信总线（22）耦合在一起的多个子组件。 至少一个端口包括多电平模拟信号（MAS）电路装置，其包括用于对由多电平模拟信号表示的数据位进行编码的发送器。 将发射机耦合到另一端口中的接收机的数据通信总线包括至少两个用于传送编码数据位的多电平差分信号总线，使得在每个多电平信号总线上，在每个数据位周期期间，信号 电平需要从第一信号电平变为第二不同的信号电平。 发射机通过将至少两个信号总线的多电平信号总线之一保持在同一电平上至少两个连续的位来指示数据边界，例如多位帧的开始或结束， 时期。

公开(公告)号：US5767751A

公开(公告)日：1998-06-16

申请号：US787836

申请日：1997-01-23

Applicant: Per Magnusson

Inventor： Per Magnusson

IPC: H03K9/02 ,  H03C1/00 ,  H03D1/00 ,  H03K7/02

CPC classification number: H03K9/02

Abstract: The problem that signal levels may change slowly over time, e.g., as a result of ranges in temperature, is overcome by employing an automatic gain control feedback loop using a comparator, hereinafter referred to as a feedback slicer, connected to the output of a programmable gain amplifier to determine whether the output of the programmable gain amplifier is higher or lower than the desired signal level to which it is known to correspond. In particular, the decision level for the feedback slicer is set so that it is equal to the desired amplitude of a correctly amplified symbol. The gain of the programmable gain amplifier is adjusted, e.g., slowly over time, so that the amplitude of the amplified symbol hovers about that level. More than one signal level may be tracked. If so, each level tracked employs its own feedback slicer. Advantageously, the hardware for performing the automatic gain control is simplified, providing a cost reduction, and if implemented on a chip, a real estate savings may be realized as well.

Abstract translation: 信号电平可能随着时间的推移而缓慢变化的问题，例如作为温度范围的结果，通过采用自动增益控制反馈环来克服，该环路使用比较器（以下称为反馈限幅器），连接到可编程 增益放大器，以确定可编程增益放大器的输出是否高于或低于已知对应的期望信号电平。 特别地，反馈限幅器的判定电平被设置为使其等于正确放大的符号的期望幅度。 可编程增益放大器的增益例如随时间缓慢地被调整，使得放大的符号的幅度围绕该电平悬停。 可以跟踪多于一个信号电平。 如果是这样，跟踪的每个级别都使用自己的反馈切片器。 有利地，用于执行自动增益控制的硬件被简化，提供成本降低，并且如果在芯片上实现，也可以实现房地产节省。

公开(公告)号：US5583892A

公开(公告)日：1996-12-10

申请号：US184064

申请日：1994-01-21

Applicant: Spase Drakul ,  Ezio Biglieri

Inventor： Spase Drakul ,  Ezio Biglieri

IPC: H04B7/00 ,  H03M13/00 ,  H04B1/00 ,  H04L27/00 ,  H03K7/02 ,  H03K9/02

CPC classification number: H04L27/00

Abstract: Digital information is transmitted by generating coded signals in the form of pulses on the basis of binary digital information and decoding the coded signals into the binary digital information, the pulses being coded in the time domain and being of at least two distinctly different shapes with respect to their numerical amplitude variation along the time axis of the pulses, the pulses comprising two bits of information in each pulse having energy one, but coded in the way that one bit of information is in the polarity and one bit in the shape, or two bits are in the shape. Communications systems utilizing the coding design combine the advantageous properties of the systems of the power-limited region and the systems of the bandwidth-limited region, in other words, the technique of the system which use multiorthogonal signal constellation and the technique of the systems which use multilevel signal constellation are combined into one new class of systems with good power efficiency and good spectral efficiency. Error performance of the new class of systems is very close to the Shannon bound.

Abstract translation: 通过基于二进制数字信息产生脉冲形式的编码信号并将编码信号解码为二进制数字信息来发送数字信息，该脉冲在时域被编码并且至少有两个明显不同的形状，相对于 对于它们沿着脉冲的时间轴的数值幅度变化，包括每个脉冲中的两比特信息的脉冲具有能量1的脉冲，但是以一位信息为极性并且形状为一位的方式进行编码，或两个 位是形状。 利用编码设计的通信系统结合功率受限区域的系统和带宽限制区域的系统的有利性质，换句话说，使用多正交信号星座的系统的技术和系统的技术， 将多电平信号星座组合成一个具有良好功率效率和良好光谱效率的新型系统。 新类系统的错误性能非常接近香农界限。