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公开(公告)号：US10523153B2
公开(公告)日：2019-12-31
申请号：US15917550
申请日：2018-03-09
Applicant: Lattice Semiconductor Corporation
IPC: H03B5/04 , H03L7/00 , H03L7/099 , H03K3/0231 , H03L7/093
Abstract: A voltage controlled oscillator (VCO) is disclosed. The VCO includes an amplifier that receives a control signal and a feedback signal and generates an amplified output signal based on the difference between the control signal and the feedback signal. The VCO also includes circuitry to generate an oscillating output signal based on the amplifier output signal. Additionally, the VCO includes a feedback amplifier that generates the feedback signal based on the output of the amplifier. The feedback amplifier includes a first resistor connected in parallel with a second resistor, the second resistor having an adjustable resistance.
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公开(公告)号：US10116428B2
公开(公告)日：2018-10-30
申请号：US15312149
申请日：2014-05-20
Applicant: Lattice Semiconductor Corporation
Inventor： Qiming Wu , Kai Lei , Fei Song , Kai Zhou , Gijung Ahn , Zhi Wu , Min-Kyu Kim
Abstract: Systems, devices and methods for analog echo cancellation for high speed full duplex data transmissions, which include a first set of differential nodes to receive reception data and transmission data, a second set of differential nodes to receive the transmission data, and a subtraction circuit to receive data from the first set of differential nodes and data from the second set of differential nodes. The subtraction circuit includes a plurality of capacitors to receive data from each of the first and second sets differential nodes, and a termination circuit for providing DC termination voltage to subtract the data of the second set of differential nodes from the data of the first set of differential nodes to eliminate echo from the reception data received at the first set differential nodes.
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公开(公告)号：US09722643B2
公开(公告)日：2017-08-01
申请号：US14651203
申请日：2015-01-05
Applicant: Lattice Semiconductor Corporation
CPC classification number: H04B1/0475 , H04B1/40 , H04B3/23 , H04L5/14
Abstract: Embodiments relate to enhancing echo cancellation in a transceiver integrated circuit (IC) for full-duplex communication by providing a signal path connected to a dummy driver that replicates a signal path between a main driver and a counterpart transceiver IC to cause a duplicated signal generated by the dummy driver to more closely replicate a sending signal generated by the main driver. The signal path connected to the dummy driver includes circuit elements having transmission line parameters and RLC parameters that replicate transmission line parameters and RLC parameters of circuit elements in the signal path between the main driver and the counterpart transceiver IC.
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公开(公告)号：US20170085359A1
公开(公告)日：2017-03-23
申请号：US15312149
申请日：2014-05-20
Applicant: LATTICE SEMICONDUCTOR CORPORATION
Inventor： Qiming Wu , Kai Lei , Fei Song , Kai Zhou , Gijung Ahn , Zhi Wu , Min-Kyu Kim
IPC: H04L5/14
CPC classification number: H04L5/1461 , H04B3/23 , H04B3/30
Abstract: Systems, devices and methods for analog echo cancellation for high speed full duplex data transmissions, which include a first set of differential nodes to receive reception data and transmission data, a second set of differential nodes to receive the transmission data, and a subtraction circuit to receive data from the first set of differential nodes and data from the second set of differential nodes. The subtraction circuit includes a plurality of capacitors to receive data from each of the first and second sets differential nodes, and a termination circuit for providing DC termination voltage to subtract the data of the second set of differential nodes from the data of the first set of differential nodes to eliminate echo from the reception data received at the first set differential nodes.
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公开(公告)号：US09887733B2
公开(公告)日：2018-02-06
申请号：US15582371
申请日：2017-04-28
Applicant: Lattice Semiconductor Corporation
Inventor： Kai Zhou , Shinje Tahk , Kai Lei , Qiming Wu , Gijung Ahn , Min-Kyu Kim , Fei Song , Kexin Luo
CPC classification number: H04B3/232 , H04B1/525 , H04L5/0091 , H04L5/14 , H04L5/1461 , H04M9/082
Abstract: A method that calibrates a device for echo cancellation and a device with calibration for echo cancellation are provided. Devices may be calibrated such that the echo residual error is less than a threshold determined by the calibration accuracy. Non-ideal factors such as mismatch may be eliminated during calibration.
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Patent Agency Ranking
公开(公告)号：US20180198409A1
公开(公告)日：2018-07-12
申请号：US15917550
申请日：2018-03-09
Applicant: Lattice Semiconductor Corporation
IPC: H03B5/04 , H03L7/099 , H03L7/093 , H03L7/00 , H03K3/0231
CPC classification number: H03B5/04 , H03B2200/0038 , H03K3/0231 , H03L7/00 , H03L7/093 , H03L7/099
Abstract: A voltage controlled oscillator (VCO) is disclosed. The VCO includes an amplifier that receives a control signal and a feedback signal and generates an amplified output signal based on the difference between the control signal and the feedback signal. The VCO also includes circuitry to generate an oscillating output signal based on the amplifier output signal. Additionally, the VCO includes a feedback amplifier that generates the feedback signal based on the output of the amplifier. The feedback amplifier includes a first resistor connected in parallel with a second resistor, the second resistor having an adjustable resistance.
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公开(公告)号：US09484939B2
公开(公告)日：2016-11-01
申请号：US14383865
申请日：2014-05-16
Applicant: LATTICE SEMICONDUCTOR CORPORATION
Inventor： Kexin Luo , Kai Zhou , Shengguo Cao , Lingfen Yue , Fangquing Chu , Yu Shen , Zhi Wu
CPC classification number: H03L7/1976 , G06F1/04 , H03L7/081 , H03L7/087 , H03L7/0891 , H03L7/091 , H03L7/093 , H03L7/193 , H03M3/30
Abstract: Embodiments describe techniques for utilizing fractional-N phase locked loops (PLL). Some embodiments describe a fractional-divider based fractional-N PLL for a spread spectrum clock (SSC) generator that utilizes phase average techniques to suppress phase interpolator nonlinearity. Some embodiments describe a fractional-N PLL based on fractional dividers with hybrid finite impulse response (FIR) filtering. Some embodiments describe a small size and low power divider for a hybrid FIR fractional-N PLL.
Abstract translation: 实施例描述了利用分数N锁相环（PLL）的技术。 一些实施例描述了利用相位平均技术来抑制相位内插器非线性的扩展频谱时钟（SSC）发生器的基于分数分频器的分数N PLL。 一些实施例描述了基于具有混合有限脉冲响应（FIR）滤波的分数分频器的分数N PLL。 一些实施例描述了用于混合FIR分数N PLL的小尺寸和低功率分配器。
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公开(公告)号：US20160285483A1
公开(公告)日：2016-09-29
申请号：US14651203
申请日：2015-01-05
Applicant: Lattice Semiconductor Corporation
CPC classification number: H04B1/0475 , H04B1/40 , H04B3/23 , H04L5/14
Abstract: Embodiments relate to enhancing echo cancellation in a transceiver integrated circuit (IC) for full-duplex communication by providing a signal path connected to a dummy driver that replicates a signal path between a main driver and a counterpart transceiver IC to cause a duplicated signal generated by the dummy driver to more closely replicate a sending signal generated by the main driver. The signal path connected to the dummy driver includes circuit elements having transmission line parameters and RLC parameters that replicate transmission line parameters and RLC parameters of circuit elements in the signal path between the main driver and the counterpart transceiver IC.
Abstract translation: 实施例涉及通过提供连接到虚拟驱动器的信号路径来增强用于全双工通信的收发机集成电路（IC）中的回波消除，该虚拟驱动器复制主驱动器和对方收发器IC之间的信号路径，以产生由 虚拟驱动程序更加密切地复制主要驱动程序生成的发送信号。 连接到虚拟驱动器的信号路径包括具有传输线参数和RLC参数的电路元件，RLC参数复制主驱动器和对方收发器IC之间的信号路径中的电路元件的传输线参数和RLC参数。
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公开(公告)号：US20160248376A1
公开(公告)日：2016-08-25
申请号：US14440186
申请日：2014-07-24
Applicant: LATTICE SEMICONDUCTOR CORPORATION
CPC classification number: H03B5/04 , H03B2200/0038 , H03K3/0231 , H03L7/00 , H03L7/093 , H03L7/099
Abstract: A voltage controlled oscillator (VCO) is disclosed. The VCO includes an amplifier that receives a control signal and a feedback signal and generates an amplified output signal based on the difference between the control signal and the feedback signal. The VCO also includes circuitry to generate an oscillating output signal based on the amplifier output signal. Additionally, the VCO includes a feedback amplifier that generates the feedback signal based on the output of the amplifier. The feedback amplifier includes a first resistor connected in parallel with a second resistor, the second resistor having an adjustable resistance.
Abstract translation: 公开了压控振荡器（VCO）。 VCO包括放大器，其接收控制信号和反馈信号，并且基于控制信号和反馈信号之间的差产生放大的输出信号。 VCO还包括基于放大器输出信号产生振荡输出信号的电路。 此外，VCO包括基于放大器的输出产生反馈信号的反馈放大器。 反馈放大器包括与第二电阻并联连接的第一电阻器，第二电阻器具有可调电阻。
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公开(公告)号：US09948234B2
公开(公告)日：2018-04-17
申请号：US14440186
申请日：2014-07-24
Applicant: LATTICE SEMICONDUCTOR CORPORATION
IPC: H03L7/00 , H03B5/04 , H03L7/099 , H03K3/0231 , H03L7/093
CPC classification number: H03B5/04 , H03B2200/0038 , H03K3/0231 , H03L7/00 , H03L7/093 , H03L7/099
Abstract: A voltage controlled oscillator (VCO) is disclosed. The VCO includes an amplifier that receives a control signal and a feedback signal and generates an amplified output signal based on the difference between the control signal and the feedback signal. The VCO also includes circuitry to generate an oscillating output signal based on the amplifier output signal. Additionally, the VCO includes a feedback amplifier that generates the feedback signal based on the output of the amplifier. The feedback amplifier includes a first resistor connected in parallel with a second resistor, the second resistor having an adjustable resistance.
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