公开(公告)号：US06469988B1

公开(公告)日：2002-10-22

申请号：US09349832

申请日：1999-07-08

申请人： Kewei Yang ,  Feng Cheng Lin ,  Yang Jing Ke

发明人： Kewei Yang ,  Feng Cheng Lin ,  Yang Jing Ke

IPC分类号： H04B320

CPC分类号： H04L5/14 ,  H04L25/0264

摘要： Signal processing techniques are applied to data rates at state-of-the-art circuit speeds (presently 1.6 Gbit/sec) by carrying out the signal flow graph of a cannonical FIR filter algorithm using hybrid analog and digital circuit techniques. A plurality of digital to analog converters (DACs) generate analog currents that are the analogue of the tap coefficients of the FIR filter model. The DACs are used as programmable current sources for the tail current sources of respective differential pair stages. Differential delay signals that are the analogue of the FIR delay-line tap signals are connected to the inputs of respective ones of the differential pair stages. The drains of the input devices of the differential pair stages are connected in parallel to common complementary load circuits. The delay signals act to steer the tap coefficient currents to one or the other of the common load circuits. The parallel connection to common load circuits acts to sum the currents sunk (if any) by each of the commonly connected input devices. This current summation is the analogue of the FIR accumulator. Because the tap coefficient currents are readily programmable, the filter may be adaptive. An illustrative embodiment uses the invention in a transceiver for high-speed full-duplex (bi-directional simultaneous) signaling over a single channel interconnect. An adaptation algorithm is used at system initialization to train the tap coefficients according to the particular channel characteristics. The invention enables reliable extraction of receive-signals from the inherent ringing induced by the channel interconnect and at higher data rates than previously possible.

摘要翻译： 信号处理技术通过使用混合模拟和数字电路技术执行炮制FIR滤波器算法的信号流程图，以最先进的电路速度（目前为1.6Gbit / s）的速率应用于数据速率。 多个数模转换器（DAC）产生作为FIR滤波器模型的抽头系数的模拟的模拟电流。 DAC用作各自差分对级的尾电流源的可编程电流源。 作为FIR延迟线抽头信号的模拟的差分延迟信号被连接到差分对级的各个的输入端。 差分对级的输入装置的漏极与公共互补负载电路并联连接。 延迟信号用于将抽头系数电流转向一个或另一个公共负载电路。 与公共负载电路的并联连接用于将每个共同连接的输入设备的电流（如果有的话）相加。 该电流求和是FIR累加器的模拟。 由于抽头系数电流易于编程，滤波器可能是自适应的。 说明性实施例将本发明用于通过单信道互连进行高速全双工（双向同时）信令的收发器。 在系统初始化时使用一种适应算法来根据特定的信道特性训练抽头系数。 本发明能够从由信道互连引起的固有振铃以及比以前更高的数据速率可靠地提取接收信号。

公开(公告)号：US5629645A

公开(公告)日：1997-05-13

申请号：US403945

申请日：1995-03-14

申请人： Yoshinori Okajima ,  Kazuyuki Kanazashi

发明人： Yoshinori Okajima ,  Kazuyuki Kanazashi

IPC分类号： G06F3/00 ,  G06F12/00 ,  G06F13/16 ,  G11C11/401 ,  H03K5/02 ,  H04L25/02 ,  H04L25/03 ,  H03K19/094

CPC分类号： H04L25/0264 ,  H04L25/03834

摘要： A transmission-line-voltage control circuit for controlling a level of a transmission line is disclosed. A signal of a first level indicating a logic high and a signal of a second level indicating a logic low are supplied to the transmission line. The transmission-line voltage control circuit includes a circuit connected to the transmission line. This circuit reduces, after the signal of the first level is supplied to the transmission line, the level of the transmission line to a third level which indicates the logic high and is less than the first level. And also the circuit increases, after the signal of the second level is supplied to the transmission line, the level of the transmission line to a fourth level which indicates the logic low and is higher than the second level.

摘要翻译： 公开了一种用于控制传输线的电平的传输线电压控制电路。 指示逻辑高的第一电平的信号和指示逻辑低的第二电平的信号被提供给传输线。 传输线电压控制电路包括连接到传输线的电路。 在将第一电平的信号提供给传输线之后，该电路将传输线的电平降低到指示逻辑高并且小于第一电平的第三电平。 并且在第二电平的信号被提供给传输线之后，电路也增加了传输线的电平到指示逻辑低并且高于第二电平的第四电平。

公开(公告)号：US12052119B2

公开(公告)日：2024-07-30

申请号：US17487461

申请日：2021-09-28

申请人： AT&T Intellectual Property I, L.P.

发明人： Paul Shala Henry ,  Thomas M. Willis, III ,  Robert Bennett ,  Farhad Barzegar ,  Irwin Gerszberg ,  Donald J. Barnickel

IPC分类号： H04L12/64 ,  H04B15/00 ,  H04L25/02

CPC分类号： H04L12/6418 ,  H04B15/00 ,  H04L25/0264

摘要： Aspects of the subject disclosure may include, receiving a plurality of communication signals, and generating, according to the plurality of communication signals, a plurality of electromagnetic waves bound at least in part to a dielectric layer of a conductor. The plurality of electromagnetic waves propagates along the dielectric layer of the conductor without an electrical return path, where each electromagnetic wave of the plurality of electromagnetic waves includes a different portions of the plurality of communication signals, and where the plurality of electromagnetic waves utilizes a signal multiplexing configuration that at least reduces an interference between the plurality of electromagnetic waves. Other embodiments are disclosed.

公开(公告)号：US11875870B2

公开(公告)日：2024-01-16

申请号：US17668606

申请日：2022-02-10

申请人： Rambus Inc.

发明人： Scott C. Best ,  John W. Poulton

IPC分类号： G11C5/06 ,  G11C5/14 ,  H04L25/02 ,  G06F13/40 ,  H04L1/20 ,  H04L25/08 ,  G06F11/07

CPC分类号： G11C5/144 ,  G06F11/076 ,  G06F11/0727 ,  G06F11/0793 ,  G06F13/4072 ,  G11C5/145 ,  H04L1/203 ,  H04L25/0264 ,  H04L25/08

摘要： In a data transmission system, one or more signal supply voltages for generating the signaling voltage of a signal to be transmitted are generated in a first circuit and forwarded from the first circuit to a second circuit. The second circuit may use the forwarded signal supply voltages to generate another signal to be transmitted back from the second circuit to the first circuit, thereby obviating the need to generate signal supply voltages separately in the second circuit. The first circuit may also adjust the signal supply voltages based on the signal transmitted back from the second circuit to the first circuit. The data transmission system may employ a single-ended signaling system in which the signaling voltage is referenced to a reference voltage that is a power supply voltage such as ground, shared by the first circuit and the second circuit.

公开(公告)号：US20230353177A1

公开(公告)日：2023-11-02

申请号：US18144342

申请日：2023-05-08

申请人： Rambus Inc.

发明人： Masum HOSSAIN ,  Nhat NGUYEN ,  Yikui Jen DONG ,  Arash ZARGARAN-YAZD ,  Wendemagegnehu BEYENE

IPC分类号： H04B1/12 ,  H04L25/03 ,  H04L25/49 ,  H04L27/06 ,  H04L27/01 ,  H04L27/00 ,  H04L25/02

CPC分类号： H04B1/123 ,  H04L25/03057 ,  H04L25/4917 ,  H04L27/06 ,  H04L27/01 ,  H04B1/12 ,  H04L27/00 ,  H04L25/03133 ,  H04L25/0264 ,  H04L25/03076

摘要： Decision feedback equalization (DFE) is used to help reduce inter-symbol interference (ISI) from a data signal received via a band-limited (or otherwise non-ideal) channel. A first PAM-4 DFE architecture has low latency from the output of the samplers to the application of the first DFE tap feedback to the input signal. This is accomplished by not decoding the sampler outputs in order to generate the feedback signal for the first DFE tap. Rather, weighted versions of the raw sampler outputs are applied directly to the input signal without further analog or digital processing. Additional PAM-4 DFE architectures use the current symbol in addition to previous symbol(s) to determine the DFE feedback signal. Another architecture transmits PAM-4 signaling using non-uniform pre-emphasis. The non-uniform pre-emphasis allows a speculative DFE receiver to resolve the transmitted PAM-4 signals with fewer comparators/samplers.

公开(公告)号：US20230308319A1

公开(公告)日：2023-09-28

申请号：US17898914

申请日：2022-08-30

申请人： Kioxia Corporation

发明人： Mitsuyuki Ashida

IPC分类号： H04L25/03 ,  H04L25/02 ,  H03K19/0185

CPC分类号： H04L25/03834 ,  H04L25/0264 ,  H03K19/01855

摘要： A semiconductor integrated circuit including a waveform shaping circuit is provided. The waveform shaping circuit receives a signal. The waveform shaping circuit operates with a first inductance value in a first period. During the first period, a rising edge or a falling edge of a waveform of the signal is enhanced. The waveform shaping circuit operates with a second inductance value in a second period. During the second period, the rising or falling edges of the waveform is not enhanced. The first inductance value is larger than the second inductance value.

公开(公告)号：US11729272B2

公开(公告)日：2023-08-15

申请号：US17032703

申请日：2020-09-25

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： Hugo Cheung ,  Michael Douglas Snedeker

IPC分类号： H04L67/12 ,  H04L69/08 ,  G05B19/042 ,  G05B19/418 ,  H04L25/02 ,  G06F13/42

CPC分类号： H04L67/12 ,  G05B19/0425 ,  G05B19/4186 ,  H04L25/0264 ,  H04L69/08 ,  G05B2219/25428 ,  G06F13/4213

摘要： A current loop includes a receiver assembly and a transmitter assembly. The current loop also includes: a first conductor between the receiver assembly and the transmitter assembly; and a second conductor between the receiver assembly and the transmitter assembly to complete the current loop. The transmitter assembly includes: a Highway Addressable Remote Transducer (HART) modem; a component in communication with the HART modem via a partial set of Universal Asynchronous Receiver-Transmitter (UART) communication lines; and a break extension protocol controller coupled to or included with the HART modem and configured to support UART and non-UART communications between the HART modem and the component using the partial set of UART communication lines.

公开(公告)号：US11728845B2

公开(公告)日：2023-08-15

申请号：US17230087

申请日：2021-04-14

申请人： Solaredge Technologies Ltd.

发明人： Ofir Bieber

IPC分类号： H04B3/56 ,  H04B1/04 ,  H04B1/16 ,  H04L25/02

CPC分类号： H04B3/56 ,  H04B1/04 ,  H04B1/16 ,  H04L25/0264 ,  H04B2203/5404 ,  H04B2203/5429 ,  H04B2203/5483

摘要： A power line communication device including a current path provided between a first terminal and a second terminal. A coupling circuit includes a first circuit of a first inductor connected in parallel with a first capacitor and a first resistor, wherein the coupling circuit is connected between the first and second terminals. A sensor is configured to sense a communication parameter of the coupling circuit. The communication parameter may be a resonance of the first circuit, the quality (Q) factor of the resonance, the bandwidth (BW) of the coupling circuit, the resistance of the first resistor, or the impedance of the first circuit. A transceiver is adapted to couple to the first and second terminal to transmit a signal onto the current path or receive a signal from the current path responsive to the parameter of the coupling circuit and a level of current in the current path sensed by the sensor.

公开(公告)号：US20180278278A1

公开(公告)日：2018-09-27

申请号：US15993192

申请日：2018-05-30

申请人： Nvidia Corporation

发明人： Dennis Ma ,  Marvin Denman ,  Eric Tyson ,  Stephen D. Glaser

IPC分类号： H04B1/04 ,  H04L25/02 ,  G06F21/83 ,  H04M7/12

CPC分类号： H04B1/04 ,  G06F21/83 ,  H04L25/0264 ,  H04L25/0276 ,  H04M7/126

摘要： A transmitter for a high speed serial communications link, a serial communications link, and a receiver for a high speed serial communications link are disclosed herein. In one embodiment, the transmitter includes: (1) a communications interface connected to a transmission medium having multiple lanes, and (2) a safe mode circuit coupled to the communications interface and configured to send data over the transmission medium in a safe mode, wherein in the safe mode at least one of the lanes is dedicated to transmitting a link detect signal for link detection.

公开(公告)号：US20180234274A1

公开(公告)日：2018-08-16

申请号：US15520692

申请日：2015-10-05

申请人： Sony Corporation

发明人： Takashi Yokokawa

IPC分类号： H04L25/49 ,  H04L25/02 ,  H04L25/03 ,  H04L7/02

CPC分类号： H04L25/49 ,  H03K5/135 ,  H04L7/02 ,  H04L25/0264 ,  H04L25/03 ,  H04L25/4917 ,  H04L25/493

摘要： A transmission device of the disclosure includes: a transmission symbol generator unit that generates, on the basis of a predetermined number of transition signals each of which indicates a transition in a sequence of transmission symbols, transmission symbol signals that are equal in number to the predetermined number, a serializer unit that serializes the predetermined number of the transmission symbol signals, to generate a serial signal; and a driver unit that operates on the basis of the serial signal.