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

Inventor： Qiming Wu ,  Yibin Fu ,  Yu Shen ,  Zhi Wu ,  Kai Lei ,  Kai Zhou ,  Kexin Luo ,  Xiaofeng Wang

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.

公开(公告)号：US20160373244A1

公开(公告)日：2016-12-22

申请号：US14917556

申请日：2015-02-27

Applicant: LATTICE SEMICONDUCTOR CORPORATION

Inventor： Xiaozhi Lin ,  Fei Song ,  Xiaofeng Wang ,  Zhiyuan Shen ,  Baoli Tong

IPC: H04L7/033 ,  H03L7/093 ,  H03L7/099 ,  H03L7/08

CPC classification number: H04L7/0331 ,  H03L7/0807 ,  H03L7/085 ,  H03L7/093 ,  H03L7/099 ,  H03L7/10 ,  H04L7/0087

Abstract: Clock and data recovery (CDR) systems for aligning a local clock signal to an incoming data signal to extract correct timing information from the incoming data signal are provided. A phase detector receives the local clock signal and the incoming data signal and generates an output phase error signal to indicate whether the local clock signal is leading or lagging the incoming data signal. The phase detector includes a bang-bang phase detector and a phase difference con roller. The output phase error signal is suitable for aligning the local clock signal to the incoming data signal.

Abstract translation: 提供了用于将本地时钟信号与输入数据信号对准的时钟和数据恢复（CDR）系统，以从输入数据信号中提取正确的定时信息。 相位检测器接收本地时钟信号和输入数据信号，并产生输出相位误差信号，以指示本地时钟信号是引导还是滞后输入数据信号。 相位检测器包括爆轰相位检测器和相位差滚筒。 输出相位误差信号适用于将本地时钟信号与输入数据信号对准。

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

Inventor： Qiming Wu ,  Yibin Fu ,  Yu Shen ,  Zhi Wu ,  Kai Lei ,  Kai Zhou ,  Kexin Luo ,  Xiaofeng Wang

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.

公开(公告)号：US20170149437A1

公开(公告)日：2017-05-25

申请号：US15114394

申请日：2015-05-12

Applicant: Lattice Semiconductor Corporation

Inventor： Kexin Luo ,  Rui Yin ,  Xiaofeng Wang ,  Jie Yuan ,  Qiming Wu ,  Fei Song ,  Min-Kyu Kim

IPC: H03L7/00

CPC classification number: H03L7/00 ,  H03B5/04 ,  H03K3/011 ,  H03K3/0231 ,  H03K3/03 ,  H03L1/00 ,  H03L7/093 ,  H03L7/099

Abstract: Embodiments relate to a voltage oscillator (VCO) that uses a replica bias circuit to generate a cascode bias voltage. The VCO generate an output periodic signal having a frequency and phase that is less or not susceptible to voltage swings by using a bias voltage generated in a replica bias circuit that replicates a voltage-to-current converter in the VOC. The bias voltage is generated and regulated according to a power supply voltage that supplies power to the VCO to account for voltage variations in the power supply voltage.

公开(公告)号：US10250263B2

公开(公告)日：2019-04-02

申请号：US15114394

申请日：2015-05-12

Applicant: Lattice Semiconductor Corporation

Inventor： Kexin Luo ,  Rui Yin ,  Xiaofeng Wang ,  Jie Yuan ,  Qiming Wu ,  Fei Song ,  Min-Kyu Kim

IPC: H03L7/00 ,  H03K3/011 ,  H03B5/04 ,  H03L1/00 ,  H03L7/093 ,  H03K3/03 ,  H03K3/0231 ,  H03L7/099

Abstract: Embodiments relate to a voltage oscillator (VCO) that uses a replica bias circuit to generate a cascode bias voltage. The VCO generate an output periodic signal having a frequency and phase that is less or not susceptible to voltage swings by using a bias voltage generated in a replica bias circuit that replicates a voltage-to-current converter in the VOC. The bias voltage is generated and regulated according to a power supply voltage that supplies power to the VCO to account for voltage variations in the power supply voltage.

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

Inventor： Qiming Wu ,  Yibin Fu ,  Yu Shen ,  Zhi Wu ,  Kai Lei ,  Kai Zhou ,  Kexin Luo ,  Xiaofeng Wang

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.

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

Inventor： Qiming Wu ,  Yibin Fu ,  Yu Shen ,  Zhi Wu ,  Kai Lei ,  Kai Zhou ,  Kexin Luo ,  Xiaofeng Wang

IPC: H03B5/04 ,  H03L7/093 ,  H03L7/099

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。