公开(公告)号：US20030122630A1

公开(公告)日：2003-07-03

申请号：US10367766

申请日：2003-02-19

Applicant: Fox Enterprises, Inc., a Florida corporation

Inventor： John W. Fallisgaard ,  Eugene S. Trefethan

IPC: H03B005/32

CPC classification number: H03L7/183 ,  H03B5/366 ,  H03B19/00 ,  H03B2201/0266 ,  H03J2200/10 ,  H03L7/0898

Abstract: A programmable crystal oscillator is provided having a memory for storing frequency-defining parameters. Typically, one of these parameters is used to program an adjustable capacitive load circuit coupled to a crystal to thereby adjust the crystal source frequency. Additional parameters are used to program the output frequency of a phase locked loop circuit coupled to receive the adjusted source frequency. A further parameter can also be used to divide the output frequency of the phase locked loop circuit to supply a specified output frequency. The oscillators can be manufactured as generic programmable crystal oscillators without regard for output frequency and then quickly programmed to produce customer-specified output frequencies with a high degree of accuracy.

Abstract translation: 提供了一种可编程晶体振荡器，其具有用于存储频率定义参数的存储器。 通常，这些参数之一用于对耦合到晶体的可调容性负载电路进行编程，从而调节晶体源频率。 附加参数用于编程耦合以接收经调整的源频率的锁相环电路的输出频率。 还可以使用另外的参数来分频锁相环电路的输出频率以提供指定的输出频率。 振荡器可以制造为通用可编程晶体振荡器，而不考虑输出频率，然后快速编程，以高精度产生客户指定的输出频率。

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：US5117206A

公开(公告)日：1992-05-26

申请号：US623000

申请日：1990-12-04

Applicant: Yoichi Imamura

Inventor： Yoichi Imamura

IPC: H01G7/00 ,  H01L21/822 ,  H01L27/04 ,  H03B1/00 ,  H03B5/04 ,  H03B5/32 ,  H03L1/02

CPC classification number: H03L1/026 ,  H03B2201/0266 ,  H03B5/04 ,  H03B5/32 ,  H03J2200/10

Abstract: A variable capacitance circuit comprising a capacitor array, associated switching elements and transient impedance varying circuits. The capacitor array comprises a plurality of capacitor elements connected to a common node coupled to a crystal oscillator in a crystal oscillator portion and each capacitor element includes a connected switching element that controls activation of selected capacitor elements that are selectively placed in operation as load capacitance with the crystal oscillator to change and adjust its frequency. Further, circuits are provided in a temperature compensation portion to selectively control the activation of the switching elements based upon decoded compensating values provided in memory, such as based upon sensed oscillator temperature conditions. The transient impedance varying circuits comprise multi-level voltage generating circuits for changing the continuity impedance of activated switching elements, among switching elements being switched, to another impedance level or one of a plurality of additional impedance levels. As a result, an intermediate impedance value can be created between the ON and OFF states of the switching elements so that there is no rapid change in the total equivalent capacitance imposed by the capacitor array on the oscillator resulting in smooth capacitance switching which corresponds to smoother frequency adjustment of oscillator output.

公开(公告)号：US11770101B2

公开(公告)日：2023-09-26

申请号：US17723103

申请日：2022-04-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Mina Shahmohammadi ,  Masoud Babaie ,  Robert Bogdan Staszewski

IPC: H03B5/12 ,  H03F3/193 ,  H03F1/56 ,  H03F3/24 ,  H03F3/72 ,  H04B1/44 ,  H03L7/00

CPC classification number: H03B5/1243 ,  H03B5/1218 ,  H03B5/1228 ,  H03B5/1262 ,  H03B5/1265 ,  H03B5/1293 ,  H03B5/1296 ,  H03F1/565 ,  H03F3/193 ,  H03F3/245 ,  H03F3/72 ,  H03L7/00 ,  H04B1/44 ,  H03B2201/0266

Abstract: The invention relates to a radio frequency oscillator, the radio frequency oscillator comprising a resonator circuit being resonant at an excitation of the resonator circuit in a differential mode and at an excitation of the resonator circuit in a common mode, wherein the resonator circuit has a differential mode resonance frequency at the excitation in the differential mode, and wherein the resonator circuit has a common mode resonance frequency at the excitation in the common mode, a first excitation circuit being configured to excite the resonator circuit in the differential mode to obtain a differential mode oscillator signal oscillating at the differential mode resonance frequency, and a second excitation circuit being configured to excite the resonator circuit in the common mode to obtain a common mode oscillator signal oscillating at the common mode resonance frequency.

公开(公告)号：US20190245486A1

公开(公告)日：2019-08-08

申请号：US16149147

申请日：2018-10-02

Applicant: MEDIATEK INC.

Inventor： Yu-Ming Ying

IPC: H03B5/12

CPC classification number: H03B5/1228 ,  H03B2200/0082 ,  H03B2200/009 ,  H03B2201/0266

Abstract: A switching inductor device having a first port and a second port includes a first inductor and a second inductor with a switch circuit. The first inductor is coupled between the first port and the second port. The second inductor and the switch circuit are connected in series, and are coupled between the first port and the second port; the first inductor and the second inductor are connected in parallel when the switch circuit is turned on.

公开(公告)号：US09735732B1

公开(公告)日：2017-08-15

申请号：US15177594

申请日：2016-06-09

Applicant: International Business Machines Corporation

Inventor： Mark A. Ferriss ,  Daniel J. Friedman ,  Wooram Lee ,  Bodhisatwa Sadhu ,  Alberto Valdes Garcia

IPC: H03L7/00 ,  H03B5/12 ,  H03B27/00 ,  H03K3/03

CPC classification number: H03B5/1265 ,  H03B5/1212 ,  H03B27/00 ,  H03B2201/0266 ,  H03K3/0315

Abstract: An apparatus includes an oscillation ring comprising N oscillators, where N is an even integer that is greater than 3, the N oscillators connected in series in a loop by N connection nodes, each oscillator of the N oscillators comprising a pair of cross-coupled inverting amplifiers. The apparatus also includes N inductors arranged in a star configuration such that each inductor of the N inductors connects to a corresponding connection node of the oscillation ring and a common connection node of the star configuration. The apparatus may also include N capacitor banks. Each of the N capacitor banks may include a plurality of activation switches for loading a corresponding oscillator with capacitance. A method includes providing the above apparatus and activating selected activation switches to adjust an oscillation frequency for the oscillation ring toward a desired value.

公开(公告)号：US09537448B2

公开(公告)日：2017-01-03

申请号：US15013160

申请日：2016-02-02

Applicant: Seiko Epson Corporation

Inventor： Akihiro Fukuzawa

IPC: H03B5/32 ,  H03B5/12

CPC classification number: H03B5/32 ,  H03B5/124 ,  H03B5/366 ,  H03B2200/0092 ,  H03B2201/0266 ,  H03L2207/05

Abstract: An oscillator includes: an oscillation circuit whose oscillation frequency changes based on a voltage that is applied to a variable capacitance element; and a voltage generation unit that generates the voltage which is applied to the variable capacitance element based on a control signal, in which the voltage that is generated by the voltage generation unit changes nonlinearly with respect to a change in the control signal such that a change in the oscillation frequency with respect to the change in the control signal is adjusted to come close to be linear.

Abstract translation: 振荡器包括：振荡电路，其振荡频率基于施加到可变电容元件的电压而变化; 以及电压产生单元，其基于控制信号生成施加到可变电容元件的电压，其中由电压产生单元产生的电压相对于控制信号的变化非线性地变化，使得变化 在相对于控制信号的变化的振荡频率被调整为接近于线性。

公开(公告)号：US20160226446A1

公开(公告)日：2016-08-04

申请号：US15013160

申请日：2016-02-02

Applicant: Seiko Epson Corporation

Inventor： Akihiro FUKUZAWA

IPC: H03B5/32

CPC classification number: H03B5/32 ,  H03B5/124 ,  H03B5/366 ,  H03B2200/0092 ,  H03B2201/0266 ,  H03L2207/05

Abstract: An oscillator includes: an oscillation circuit whose oscillation frequency changes based on a voltage that is applied to a variable capacitance element; and a voltage generation unit that generates the voltage which is applied to the variable capacitance element based on a control signal, in which the voltage that is generated by the voltage generation unit changes nonlinearly with respect to a change in the control signal such that a change in the oscillation frequency with respect to the change in the control signal is adjusted to come close to be linear.

Abstract translation: 振荡器包括：振荡电路，其振荡频率基于施加到可变电容元件的电压而变化; 以及电压产生单元，其基于控制信号生成施加到可变电容元件的电压，其中由电压产生单元产生的电压相对于控制信号的变化非线性地变化，使得变化 在相对于控制信号的变化的振荡频率被调整为接近于线性。

公开(公告)号：US20130296217A1

公开(公告)日：2013-11-07

申请号：US13880482

申请日：2011-10-21

Applicant: Ehsan Afshari ,  Guansheng Li

Inventor： Ehsan Afshari ,  Guansheng Li

IPC: C11D3/42

CPC classification number: H03B5/1265 ,  H03B5/1212 ,  H03B5/1225 ,  H03B5/1228 ,  H03B2200/0048 ,  H03B2200/005 ,  H03B2201/0266

Abstract: The present invention is directed to a distributed dual-band oscillator suitable for low-phase-noise applications. The invention is configured to switch between the odd and even resonant modes of a fourth-order resonator. The switches used for mode selection do not conduct current and therefore do not affect the quality factor (Q) of the resonator. The benefit of this feature is relatively low phase noise.

Abstract translation: 本发明涉及适用于低相位噪声应用的分布式双频振荡器。 本发明被配置为在四阶谐振器的奇偶谐振模式之间切换。 用于模式选择的开关不会导通电流，因此不影响谐振器的品质因数（Q）。 该功能的优点是相位相对较低。

公开(公告)号：US20110319036A1

公开(公告)日：2011-12-29

申请号：US12821489

申请日：2010-06-23

Applicant: Chen Tse-Peng

Inventor： Chen Tse-Peng

IPC: H04B1/40 ,  H03B21/00 ,  H03B5/12

CPC classification number: H03B5/1228 ,  H03B5/1212 ,  H03B5/1265 ,  H03B2201/0266 ,  H03J3/20 ,  H03J2200/10

Abstract: An oscillator circuit having a source of an oscillating signal, a tank circuit including an inductor and a capacitor, and a discretely switchable capacitance module configured to control an amount of capacitance in the oscillator circuit. The discretely switchable capacitance module includes, in one embodiment, a capacitor coupled between a first node and a second node, a switch, having a control node, coupled between the second node and a third node; and a DC feed circuit, having a first end coupled to the second node and a second end configured to receive a first or second control signal. The control node of the switch is tied to a predetermined bias voltage. When the first control signal is applied, the capacitor is coupled between the first node and the third node via the switch such that the capacitor is coupled in parallel with the capacitor of the tank circuit, and when the second control signal is applied the capacitor is decoupled from the tank circuit.

Abstract translation: 具有振荡信号源的振荡器电路，包括电感器和电容器的振荡电路以及被配置为控制振荡器电路中的电容量的离散可切换电容模块。 在一个实施例中，离散可切换电容模块包括耦合在第一节点和第二节点之间的电容器，具有耦合在第二节点和第三节点之间的控制节点的开关; 以及DC馈电电路，其具有耦合到第二节点的第一端和被配置为接收第一或第二控制信号的第二端。 开关的控制节点被连接到预定的偏置电压。 当施加第一控制信号时，电容器经由开关耦合在第一节点和第三节点之间，使得电容器与谐振电路的电容器并联耦合，并且当施加第二控制信号时，电容器 与油箱回路分离。