公开(公告)号：US5574407A

公开(公告)日：1996-11-12

申请号：US532647

申请日：1995-09-28

Applicant: Donald J. Sauer ,  William E. Rodda ,  Edward R. Campbell, III ,  Francis Dell'Ova

Inventor： Donald J. Sauer ,  William E. Rodda ,  Edward R. Campbell, III ,  Francis Dell'Ova

IPC: H03B1/00 ,  H03L7/099 ,  H03L7/113 ,  H03L7/14 ,  H04N7/12 ,  H03L7/087

CPC classification number: H03L7/14 ,  H03L7/0991 ,  H03L7/113 ,  H04N7/122 ,  H03B2201/02 ,  H03B2201/0266 ,  H03J2200/10 ,  Y10S331/02

Abstract: A phase detector of a phase-lock-loop circuit measures a phase error between an output signal of an oscillator and a synchronizing signal. When a difference between the phase error that is measured in a pair of horizontal line periods exceeds a first magnitude, that is indicative of phase error inconsistency, the phase of the oscillator output signal is not corrected and the phase-lock-loop circuit operates in an idle mode of operation.

Abstract translation: PCT No.PCT / US94 / 04291 Sec。 371 1995年9月28日第 102（e）1995年9月28日PCT PCT 1994年4月19日PCT公布。 公开号WO94 / 24768 日期1994年10月27日锁相环电路的相位检测器测量振荡器的输出信号与同步信号之间的相位误差。 当在一对水平行周期内测量的相位误差之间的差异超过第一幅度，表示相位误差不一致时，振荡器输出信号的相位不被校正，并且锁相环电路在 空闲操作模式。

公开(公告)号：US5428318A

公开(公告)日：1995-06-27

申请号：US196602

申请日：1994-02-15

Applicant: Behzad Razavi

Inventor： Behzad Razavi

IPC: H03B1/00 ,  H03B19/00 ,  H03K3/0231 ,  H03K3/03 ,  H03L7/099 ,  H03B5/02 ,  H03B27/00

CPC classification number: H03K3/0322 ,  H03K3/0231 ,  H03K3/03 ,  H03B19/00 ,  H03B2201/02

Abstract: A voltage controlled ring oscillator whose frequency does not depend on the number of stages in the ring oscillator. The inventive voltage controlled ring oscillator comprises N inverters connected in series with the output of the Nth inverter being coupled into the input of the first inverter. The output of each inverter is connected to a transconductance amplifier. The outputs of all transconductance amplifiers are summed. The oscillation period of the circuit is 2t.sub.d, (where t.sub.d is the delay of one inverter) which is independent of the number of inverters in the ring oscillator.

Abstract translation: 一个压控环形振荡器，其频率不依赖于环形振荡器中的级数。 本发明的压控环形振荡器包括与第N个反相器的输出串联连接的N个反相器，耦合到第一反相器的输入端。 每个逆变器的输出端连接到跨导放大器。 所有跨导放大器的输出相加。 电路的振荡周期为2td（其中td是一个逆变器的延迟），与环形振荡器中的反相器数量无关。

公开(公告)号：US5302920A

公开(公告)日：1994-04-12

申请号：US959868

申请日：1992-10-13

Applicant: Ricky F. Bitting

Inventor： Ricky F. Bitting

IPC: H03K3/354 ,  H03B1/00 ,  H03B5/24 ,  H03B27/00 ,  H03K3/03 ,  H03L7/099

CPC classification number: H03K3/0315 ,  H03B2201/02 ,  H03B27/00 ,  H03B5/24 ,  H03L7/0995

Abstract: An electrically controlled oscillator circuit having multi-phase outputs with programmable frequency. The circuit includes a ring oscillator having a plurality of inverting stages. Each stage has an output which is connected to a switch that can be programmed to select one of a plurality of capacitors with different values to change the frequency range of the oscillator. Controlled current is fed to the stages to vary the frequency of the oscillator within a selected frequency range. Using capacitors to change the frequency range of the oscillator reduces variations of the oscillator output frequency.

Abstract translation: 一种具有可编程频率的多相输出的电控振荡器电路。 该电路包括具有多个反相级的环形振荡器。 每个级具有连接到开关的输出，该开关可被编程为选择具有不同值的多个电容器中的一个以改变振荡器的频率范围。 控制电流馈送到级，以在选定的频率范围内改变振荡器的频率。 使用电容来改变振荡器的频率范围可以降低振荡器输出频率的变化。

公开(公告)号：US5187450A

公开(公告)日：1993-02-16

申请号：US851195

申请日：1992-03-13

Applicant: Gary L. Wagner ,  Eric B. Rodal ,  Chung Y. Lau

Inventor： Gary L. Wagner ,  Eric B. Rodal ,  Chung Y. Lau

IPC: H03B1/00 ,  H03B1/04 ,  H03B5/12 ,  H03C3/40

CPC classification number: H03B5/1231 ,  H03B5/1215 ,  H03B5/1243 ,  H03B5/1293 ,  H03B2200/0088 ,  H03B2201/02 ,  H03B2202/012 ,  H03C3/40

Abstract: An embodiment of the present invention is a voltage controlled oscillator (VCO) comprised of a differential pair of transistors that have respective positive feedback paths with phase-lead networks cross-coupled. Each positive feedback path on each side has two different phase-lead branches. The two phase-lead branches have the same phase differences on each side of the differential pair, in order to maintain a symmetry that improves common-mode noise rejection on a voltage control differential input. Current-steering is used to control the mixture of currents that arrive at the bases of the differential transistor pair from the respective two different phase-lead branches, and thereby changing the frequency of the VCO.

Abstract translation: 本发明的一个实施例是一种压控振荡器（VCO），其包括具有相互正交馈耦合的相互正反馈路径的差分对晶体管。 每侧的每个正反馈路径都有两个不同的相位导线分支。 两个相位引导分支在差分对的每一侧具有相同的相位差，以便保持改善电压控制差分输入上的共模噪声抑制的对称性。 电流转向用于控制从相应的两个不同相位 - 引线分支到达差分晶体管对的基极的电流混合，从而改变VCO的频率。

公开(公告)号：US5019791A

公开(公告)日：1991-05-28

申请号：US563246

申请日：1990-08-06

Applicant: Leonard D. Cohen

Inventor： Leonard D. Cohen

IPC: H03B1/00 ,  H03B9/14

CPC classification number: H03B9/14 ,  H03B2200/0088 ,  H03B2200/0092 ,  H03B2201/02 ,  H03B2201/0208 ,  H03B9/141

Abstract: Flicker (1/f) noise is suppressed in an oscillator by reducing oscillator voltage-frequency pushing to zero. A varactor (56) is incorporated in the resonator circuit and is biased with a tuning voltage setting the varactor to a capacitance value providing the zero oscillator pushing at a given frequency. A common bias connection (62) is provided between the varactor and the active element (64) such that a random perturbation voltage change across the active element also causes a change in voltage across the varactor, to compensate a change in oscillator frequency otherwise caused thereby. The varactor capacitance versus voltage characteristic is shaped such that a change in active element voltage provides a change in varactor voltage, and the combination of these voltage changes results in a zero change in oscillator frequency. The tuning slope of the oscillator provided by the varactor is opposite the tuning slope of the oscillator resulting from a change in active element voltage.

Abstract translation: 通过将振荡器电压频率降至零，可以抑制振荡器中的闪烁（1 / f）噪声。 变容二极管（56）被并入谐振器电路中，并且将设定变容二极管的调谐电压偏置为提供以给定频率推压的零振荡器的电容值。 在变容二极管和有源元件（64）之间提供公共偏置连接（62），使得有源元件上的随机扰动电压变化也导致变容二极管两端的电压变化，以补偿由此引起的振荡器频率的变化 。 可变容量电容对电压特性的形状使得有源元件电压的变化提供变容二极管电压的变化，并且这些电压变化的组合导致振荡器频率的零变化。 由变容二极管提供的振荡器的调谐斜率与由有源元件电压变化引起的振荡器的调谐斜率相反。

公开(公告)号：US4560957A

公开(公告)日：1985-12-24

申请号：US537310

申请日：1983-09-29

Applicant: Richard C. Cabot

Inventor： Richard C. Cabot

IPC: H03B1/00 ,  H03B5/20 ,  H03B27/00 ,  H03B5/24 ,  H03F1/34

CPC classification number: H03B5/20 ,  H03B2200/0078 ,  H03B2201/01 ,  H03B2201/02 ,  H03B27/00

Abstract: An oscillator having a circuit for fine tuning the frequency thereof while minimizing any effect on the output amplitude thereof. A state variable oscillator employs an inverter amplifier having a negative feedback resistor R.sub.f, a first integrator, and a second integrator. 180.degree. feedback from the second integrator is fed back through resistors R.sub.i and R.sub.v to an inverting input of the inverter amplifier. 90.degree. feedback from the first integrator is fed back partially through resistors R.sub.n and R.sub.v and partially through resistor R.sub.m to the inverting input, and also through resistor R.sub.c to the non-inverting input. A field effect transistor provides a common return to the non-inverting input to control oscillator amplitude. If R.sub.i R.sub.m =R.sub.n R.sub.f then R.sub.v may be adjusted to vary the frequency of the oscillator output signal without affecting its amplitude.

Abstract translation: 一种振荡器，具有用于微调其频率的电路，同时最小化对其输出幅度的任何影响。 状态可变振荡器采用具有负反馈电阻器Rf，第一积分器和第二积分器的反相放大器。 来自第二积分器的180°反馈通过电阻器Ri和Rv反馈到反相放大器的反相输入端。 来自第一积分器的90°反馈部分地通过电阻器Rn和Rv反馈并且部分地通过电阻器Rm反馈到反相输入端，并且还通过电阻器Rc反馈到非反相输入端。 场效应晶体管为非反相输入端提供一个共同的返回值，以控制振荡器幅度。 如果RiRm = RnRf，则可以调整Rv以改变振荡器输出信号的频率而不影响其振幅。

公开(公告)号：US3477040A

公开(公告)日：1969-11-04

申请号：US3477040D

申请日：1967-09-11

Applicant: PHILIPS CORP

Inventor： MEYER DIETRICH

IPC: H03B1/00 ,  H03B5/20 ,  H03B5/22 ,  H03B23/00 ,  H03C3/36 ,  H03B5/26

CPC classification number: H03C3/36 ,  H03B5/20 ,  H03B5/22 ,  H03B23/00 ,  H03B2200/0092 ,  H03B2201/02

公开(公告)号：US11677386B2

公开(公告)日：2023-06-13

申请号：US17694699

申请日：2022-03-15

Applicant: Rockchip Electronics Co., Ltd.

Inventor： Fayao Zheng

IPC: H03K3/03 ,  H03L7/06 ,  H03B5/04

CPC classification number: H03K3/0315 ,  H03B5/04 ,  H03L7/06 ,  H03B2200/003 ,  H03B2201/02

Abstract: The present disclosure provides an adaptive adjustment circuit in a computer chip having a voltage-controlled oscillator (VCO) and a processor. The adaptive adjustment circuit comprises a frequency difference acquisition module to generate a frequency difference signal based on a first difference between an oscillation frequency of the VCO and a target frequency. The adaptive adjustment circuit also includes a power module to supply a working voltage to the VCO and the processor, adjust the working voltage based on the frequency difference signal, and supply the adjusted working voltage to the VCO and the processor.

公开(公告)号：US09240755B2

公开(公告)日：2016-01-19

申请号：US14252783

申请日：2014-04-15

Applicant: NIHON DEMPA KOGYO CO., LTD.

Inventor： Masaki Hirose ,  Yukio Akazawa ,  Hiroki Hamaguchi ,  Takehito Ishii ,  Noritoshi Kimura

IPC: H03B5/36 ,  H03B21/01

CPC classification number: H03B21/01 ,  H03B5/366 ,  H03B2201/02

Abstract: An oscillator circuit includes a first resonator, a second resonator, and a frequency adjusting unit. The second resonator has a frequency characteristic different from a frequency characteristic of the first resonator. The frequency adjusting unit is configured to change a ratio between a contribution of the first resonator and a contribution of the second resonator so as to adjust an output frequency.

Abstract translation: 振荡电路包括第一谐振器，第二谐振器和频率调节单元。 第二谐振器具有与第一谐振器的频率特性不同的频率特性。 频率调整单元被配置为改变第一谐振器的贡献和第二谐振器的贡献之间的比率，以便调整输出频率。

公开(公告)号：US20140312984A1

公开(公告)日：2014-10-23

申请号：US14252783

申请日：2014-04-15

Applicant: NIHON DEMPA KOGYO CO., LTD.

Inventor： MASAKI HIROSE ,  YUKIO AKAZAWA ,  HIROKI HAMAGUCHI ,  TAKEHITO ISHII ,  NORITOSHI KIMURA

IPC: H03B28/00

CPC classification number: H03B21/01 ,  H03B5/366 ,  H03B2201/02

Abstract: An oscillator circuit includes a first resonator, a second resonator, and a frequency adjusting unit. The second resonator has a frequency characteristic different from a frequency characteristic of the first resonator. The frequency adjusting unit is configured to change a ratio between a contribution of the first resonator and a contribution of the second resonator so as to adjust an output frequency.

Abstract translation: 振荡电路包括第一谐振器，第二谐振器和频率调节单元。 第二谐振器具有与第一谐振器的频率特性不同的频率特性。 频率调整单元被配置为改变第一谐振器的贡献和第二谐振器的贡献之间的比率，以便调整输出频率。