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1. 发明授权

US11616530B2 Echo canceller system and echo cancelling method 有权
公开(公告)号：US11616530B2
公开(公告)日：2023-03-28
申请号：US17370049
申请日：2021-07-08
申请人： Realtek Semiconductor Corporation
发明人： Hsuan-Ting Ho , Liang-Wei Huang , Kuei-Ying Lu , Chia-Lin Chang
IPC分类号： H04B3/23 , H04B1/04
摘要： An echo canceller system includes a data transmitter circuit and an echo canceller circuit. The data transmitter circuit is configured to receive a transmitted signal. The echo canceller circuit includes a first filter. The first filter is configured to generate a first filtered signal according to the transmitted signal and a filter coefficient vector. The filter coefficient vector is updated according to a high-frequency leakage process. The echo canceller circuit is further configured to generate an echo cancelling signal according to the first filtered signal. The data transmitter circuit is further configured to generate an output signal according to a received signal and the echo cancelling signal.

2. 发明授权

US11190201B2 Analog to digital converter device and capacitor weight calibration method 有权
公开(公告)号：US11190201B2
公开(公告)日：2021-11-30
申请号：US17099827
申请日：2020-11-17
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Hsuan-Ting Ho , Liang-Wei Huang , Shih-Hsiung Huang
IPC分类号： H03M1/10 , H03M1/06 , H03M1/80 , H03M1/46
摘要： An analog to digital converter device includes a capacitor array, a digital logic circuit, and a comparator circuit. The capacitor array includes first capacitors, a capacitor to be calibrated, and compensation capacitors. The digital logic circuit performs a calibration on the capacitor to be calibrated, in order to calibrate a weighed value of the capacitor to be calibrated according to a decision signal, and converts an input signal to bits via the capacitor array after the calibration is performed. The comparator circuit compares a testing signal with a predetermined voltage to generate the decision signal. The testing signal is generated by the first capacitors and the capacitor to be calibrated in response to the calibration. The digital logic circuit further selects at least one of the compensation capacitors, in order to adjust a digital code corresponding to a calibrated weighed value to be an integer expressed by the bits.

3. 发明授权

US10171097B1 Correcting device of successive approximation analog-to-digital conversion 有权
公开(公告)号：US10171097B1
公开(公告)日：2019-01-01
申请号：US16048479
申请日：2018-07-30
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Sheng-Hsiung Lin , Jie-Fan Lai , Liang-Wei Huang , Chih-Lung Chen , Shih-Hsiung Huang
IPC分类号： H03M1/06 , H03M1/08
摘要： Disclosed is a correcting device of successive approximation analog-to-digital conversion. The correcting device includes a successive approximation register analog-to-digital converter (SAR ADC) and a digital circuit. The SAR ADC is configured to generate a digital output. The digital circuit is configured to determine whether the digital output conforms to a metastable output, and correct the digital output when the digital output conforms to the metastable output. The metastable output is related with a metastable binary comparison-results sequence including successive K comparison results such as 110000 or 001111. The K comparison results include a first comparison result, a second comparison result and successive M comparison results in turn. The first comparison result and the second comparison result are the same; the M comparison results are the same; each of the first comparison result and the second comparison result is different from any of the M comparison results.

4. 发明授权

US09973235B2 Signal receiving device for Ethernet and control method thereof 有权
公开(公告)号：US09973235B2
公开(公告)日：2018-05-15
申请号：US14799023
申请日：2015-07-14
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Sheng-Fu Chuang , Liang-Wei Huang , Ching-Yao Su , Hsuan-Ting Ho
IPC分类号： H04B3/32 , H04L25/03
CPC分类号： H04B3/32 , H04L25/03057
摘要： This invention discloses a signal receiving device for Ethernet and a control method thereof. The signal receiving device includes a gain control circuit, an alien near-end crosstalk canceller, a noise canceller, and a DFE. The gain control circuit adjusts an input signal of the signal receiving device according to a setting parameter. The alien near-end crosstalk canceller cancels an alien near-end crosstalk interference. The noise canceller uses a first filter to cancel noises. The DFE uses a second filter to cancel an inter-symbol interference of the input signal. The method includes steps of: temporarily stopping the gain control circuit from updating the setting parameter before a seed collision occurs, and temporarily stopping one of the noise canceller and the decision feedback canceller from updating the first filter coefficient of the first filter or the second filter coefficient of the second filter temporarily during the seed collision.

5. 发明授权

US09386517B2 Energy efficient network communication device and method 有权
标题翻译：节能网络通信设备及方法
公开(公告)号：US09386517B2
公开(公告)日：2016-07-05
申请号：US14044540
申请日：2013-10-02
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Ta-Chin Tseng , Shieh-Hsing Kuo , Liang-Wei Huang , Heng Cheong Lao
IPC分类号： H04W52/02 , H04L12/12 , G06F1/32 , H04L29/06
CPC分类号： H04W52/0203 , G06F1/3209 , G06F1/3278 , G06F1/3287 , H04L12/12 , H04L63/0428 , H04L63/0485 , H04L63/162 , Y02D10/157 , Y02D10/171 , Y02D70/1222
摘要： The present invention discloses an energy efficient network communication device comprising: a media-access-controller for outputting a transmission-end low power idle (LPI) indication and receiving a reception-end LPI indication; a media-independent-interface for generating a transmission-end LPI signal according to the transmission-end LPI indication, and generating the reception-end LPI indication according to a reception-end LPI signal; and a physical-layer-circuit, coupled to several pairs of transmission lines, for converting the transmission-end LPI signal into a transmission signal to send it to a reception end for requesting an LPI mode and receiving a reception signal from the reception end to convert it into the reception-end LPI signal. Said physical-layer-circuit uses some of the several pairs of transmission lines for transmission and reception when keeping the other pairs of transmission lines unused to save power; furthermore, the physical-layer-circuit can enter the LPI mode from an idle mode for additional power saving.
摘要翻译：本发明公开了一种节能网络通信设备，包括：媒体接入控制器，用于输出发送端低功率空闲（LPI）指示并接收接收端LPI指示; 根据发送端LPI指示生成发送端LPI信号的媒体独立接口，根据接收端LPI信号生成接收端LPI指示; 以及耦合到几对传输线的物理层电路，用于将传输端LPI信号转换为传输信号，以将其发送到接收端，以请求LPI模式并从接收端接收接收信号将其转换为接收端LPI信号。所述物理层电路在保持其他传输线对不被使用以节省功率时，使用几对传输线路中的一些传输线进行传输和接收; 此外，物理层电路可以从空闲模式进入LPI模式以进行额外的省电。

6. 发明申请

US20150185278A1 Temperature insensitive testing device and method 有权
标题翻译：温度不敏感的测试装置和方法
公开(公告)号：US20150185278A1
公开(公告)日：2015-07-02
申请号：US14531612
申请日：2014-11-03
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Ching-Yao Su , Liang-Wei Huang , Shih-Wei Wang , Sheng-Fu Chuang
IPC分类号： G01R31/28
CPC分类号： G01R31/2837 , G01R31/2841 , H04L1/243
摘要： The present invention discloses a temperature insensitive testing device comprising: a transmission-end test sequence generating circuit to generate a test sequence; a transmission circuit to process the test sequence according to a transmission clock and thereby generate a test signal; a reception circuit to process an echo of the test signal and generate a digital echo signal; a correlation-value generating circuit to generate correlation values including a maximum correlation value according to the test sequence and the digital echo signal; and a decision circuit to determine whether a relation between the maximum correlation value and at least one threshold satisfies a predetermined condition and thereby generate a decision result, wherein the frequency of the transmission clock is lower than a predetermined frequency which confines the variation of the maximum correlation value to a predetermined range provided that the temperature variation of the transmission cable is within a temperature variation range.
摘要翻译：本发明公开了一种温度不敏感测试装置，包括：发送端测试序列产生电路，用于产生测试序列; 传输电路，用于根据传输时钟处理测试序列，从而产生测试信号; 接收电路，用于处理测试信号的回波并产生数字回波信号; 相关值产生电路，用于产生包括根据测试序列和数字回声信号的最大相关值的相关值; 以及确定所述最大相关值和至少一个阈值之间的关系是否满足预定条件并由此产生判定结果的判定电路，其中所述传输时钟的频率低于限制所述最大相关值的最大值的变化的预定频率相关值为预定范围，前提是传输电缆的温度变化在温度变化范围内。

7. 发明授权

US08964917B2 Signal transmission device performing compensation by filtering characteristics and method thereof, and signal reception device offsetting compensation and method thereof 有权
标题翻译：信号传输装置通过滤波特性及其方法进行补偿，以及信号接收装置的补偿补偿及其方法
公开(公告)号：US08964917B2
公开(公告)日：2015-02-24
申请号：US14102083
申请日：2013-12-10
申请人： Realtek Semiconductor Corporation
发明人： Sheng-Fu Chuang , Liang-Wei Huang , Ching-Yao Su , Chun-Hung Liu , Hsuan-Ting Ho , Cheng-Han Lee
IPC分类号： H03K7/02 , H03K9/02 , H04L25/497 , H04L25/03 , H04L25/49
CPC分类号： H04L25/4975 , H04L25/03019 , H04L25/4917
摘要： 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.
摘要翻译：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。

8. 发明申请

US20150052181A1 PARAMETER GENERATING DEVICE AND METHOD 有权
标题翻译：参数生成装置和方法
公开(公告)号：US20150052181A1
公开(公告)日：2015-02-19
申请号：US14323411
申请日：2014-07-03
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Ching-Yao Su , Liang-Wei Huang , Shih-Wei Wang , Wan-Chun Huang
IPC分类号： G06F7/50
CPC分类号： G06F17/10
摘要： The present invention discloses a parameter generating device and the method thereof to generate a parameter for circuit operation in which the parameter corresponds to an N degree polynomial of a characteristic curve while said N is a positive integer. The parameter generating device comprises: a storage circuit to store at least N+1 initial values that are determined by a start value and a unit variation amount; and an parameter calculating circuit, coupled to the storage circuit, to carry out addition calculation for at least [(K−1)×N+1] time(s) if a multiple K is positive or subtraction calculation for at least −K×N time(s) if the multiple K is negative, so as to generate the aforementioned parameter, wherein the multiple K is derived from a difference divided by the unit variation amount while the difference is a current value minus the start value.
摘要翻译：本发明公开了一种参数产生装置及其产生用于电路操作的参数的方法，其中参数对应于特性曲线的N度多项式，而所述N是正整数。参数产生装置包括：存储电路，用于存储由起始值和单位变化量确定的至少N + 1个初始值; 以及耦合到存储电路的参数计算电路，如果多个K是至少-K×的正或减计算，则至少执行[（K-1）×N + 1]个时间的加法运算如果多个K为负，则产生N个时间，从而产生上述参数，其中多个K是根据除以单位变化量的差导出的，而该差是当前值减去起始值。

9. 发明授权

US11171740B2 Transceiver and operation method of the same 有权
公开(公告)号：US11171740B2
公开(公告)日：2021-11-09
申请号：US16874307
申请日：2020-05-14
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Liang-Wei Huang , Yu-Xuan Huang , Huan-Chung Chen , Chia-Lin Chang
IPC分类号： H04B3/23 , H04L1/00
摘要： The present invention provides a transceiver. The transistor is coupled to a transmission line. The transceiver includes a variable resistor set, a transmitter module, a receiver module, and a digital signal processor. The transmitter module has an output terminal coupled to the variable resistor set and the transmission line. The transmitter module includes a first digital-to-analog converter configured to output an emission current. The receiver module has an input terminal coupled to the transmitter module and the transmission line. When the emission current is fed into the transmission line, a far-end echo is fed into the receiver module. An amplitude of the far-end echo is associated with a resistance value of the transmission line. The digital signal processor adjusts a current value of the emission current from a first default current value to a second default current value based on the amplitude of the far-end echo.

10. 发明授权

US11063628B2 Communication device capable of echo cancellation 有权
公开(公告)号：US11063628B2
公开(公告)日：2021-07-13
申请号：US16889051
申请日：2020-06-01
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Liang-Wei Huang , Yu-Xuan Huang
IPC分类号： H04L5/16 , H04B3/20
摘要： A communication device capable of echo cancellation includes a digital circuit, a transmitter circuit, a hybrid circuit, an adjustable capacitor circuit, and a receiver circuit. The digital circuit transmits a digital transmission signal and receives a digital reception signal. The transmitter circuit outputs an analog transmission differential signal according to the digital transmission signal. The hybrid circuit outputs a transmission signal to an external circuit via an adjustable capacitor circuit according to the analog transmission differential signal, and outputs an analog reception differential signal to a receiver circuit according to at least one of the analog transmission differential signal and a reception signal from the external circuit. The adjustable capacitor circuit controls a delay difference between positive-end and negative-end signals of the transmission signal according to an echo cancellation control signal. The receiver circuit outputs the digital reception signal to the digital circuit according to the analog reception differential signal.

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