公开(公告)号：US08217690B2

公开(公告)日：2012-07-10

申请号：US12801042

申请日：2010-05-18

申请人： Weiliang Hu ,  Noriaki Matsuno

发明人： Weiliang Hu ,  Noriaki Matsuno

IPC分类号： H03L7/099 ,  H03L1/00

CPC分类号： H03L7/099 ,  H03L1/022 ,  H03L7/18 ,  H03L2207/06

摘要： A frequency synthesizer comprises a VCO group; a phase comparator; and a loop filter. Each VCO includes a varactor and a capacitor bank including a plurality of weighted capacitance elements, and a plurality of switches turned ON and OFF based on a control signal. Also provided a temperature compensation including a varactor correction potential generation circuit, a correction potential generation circuit for parasitic capacitance of the capacitor bank, a variable gain amplifier in which weighting processing, based on a control signal of the capacitor bank, is performed on an output potential of the correction potential generation circuit, and an adder circuit that adds the output voltage of the correction potential generation circuit of the varactor and output voltage of the variable gain amplifier, and the varactor of the VCO is controlled by output (correction potential) of the adder circuit.

摘要翻译： 频率合成器包括VCO组; 相位比较器 和环路滤波器。 每个VCO包括基于控制信号的变容二极管和包括多个加权电容元件的电容器组，以及多个开关导通和截止。 还提供了包括变容二极管校正电位产生电路，用于电容器组的寄生电容的校正电位产生电路的温度补偿，可变增益放大器，其中基于电容器组的控制信号对输出执行加权处理 校正电位产生电路的电位和可变电抗器的校正电位产生电路的输出电压和可变增益放大器的输出电压以及VCO的变容二极管的加法电路由输出（校正电位） 加法器电路。

公开(公告)号：US08134414B2

公开(公告)日：2012-03-13

申请号：US12766205

申请日：2010-04-23

申请人： Michael Shannon McCorquodale ,  Scott Michael Pernia ,  Vidyabhusan Gupta ,  Nathaniel Charles Gaskin ,  Nader Fayyaz

发明人： Michael Shannon McCorquodale ,  Scott Michael Pernia ,  Vidyabhusan Gupta ,  Nathaniel Charles Gaskin ,  Nader Fayyaz

IPC分类号： H03B5/12 ,  H03L1/00 ,  H03L5/00 ,  H03L7/099

CPC分类号： H03B5/04 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1271 ,  H03B5/1293

摘要： Exemplary embodiments provide a reference signal generator having a reference or center frequency within a predetermined variance over variations in temperature within a specified range. An exemplary apparatus comprises a reference resonator to generate a first reference signal having a resonant frequency, with the reference resonator having a first temperature dependence; and a plurality of switchable circuits, with at least one switchable circuit providing a second temperature dependence opposing the first temperature dependence to maintain the resonant frequency within a predetermined variance over a temperature variation. A wide variety of switchable circuits are disclosed, including a transistor having an on resistance value greater than a nominal resistance, a resistor coupled to a transistor or other switch, and circuit comprising a first reactance coupled to a first switch, with a second reactance coupled to a resistance and a second switch coupled in series to the second reactance or to the resistance. Various coatings may also be applied to an integrated circuit embodiment, such as a silicone coating on a first surface and a metal layer on a second surface.

摘要翻译： 示例性实施例提供了参考信号发生器，其具有在指定范围内的温度变化的预定方差内的参考或中心频率。 示例性装置包括参考谐振器，以产生具有谐振频率的第一参考信号，参考谐振器具有第一温度依赖性; 以及多个可切换电路，其中至少一个可切换电路提供与第一温度依赖性相反的第二温度依赖性，以将谐振频率保持在温度变化以上的预定变化范围内。 公开了各种各样的可切换电路，包括具有大于标称电阻的导通电阻值的晶体管，耦合到晶体管或其它开关的电阻器，以及包括耦合到第一开关的第一电抗的电路，第二电抗耦合 耦合到与第二电抗或电阻串联耦合的电阻和第二开关。 各种涂层也可以应用于集成电路实施例，例如第一表面上的硅氧烷涂层和第二表面上的金属层。

公开(公告)号：US08081040B1

公开(公告)日：2011-12-20

申请号：US12497924

申请日：2009-07-06

申请人： Shimon Avitan

发明人： Shimon Avitan

IPC分类号： H03L1/00

CPC分类号： H03L7/0995 ,  H03L2207/06

摘要： Aspects of the disclosure provide a voltage controlled oscillator. The voltage controlled oscillator can include a plurality of oscillation stages coupled together to generate an oscillation signal having an oscillation frequency. At least one oscillation stage of the plurality of oscillation stages can include a first portion driven by a first driving power that can be a function of a control voltage and a second portion driven by a second driving power that can be substantially independent of the control voltage. The first driving power can be provided by a first power rail in the form of a driving current that is a function of the control voltage. The second driving power can be provided by a second power rail in the form of a substantially constant voltage that is substantially independent of the control voltage.

摘要翻译： 本公开的方面提供压控振荡器。 压控振荡器可以包括耦合在一起的多个振荡级以产生具有振荡频率的振荡信号。 多个振荡级的至少一个振荡级可以包括由可以是控制电压的函数的第一驱动功率驱动的第一部分和由基本上不受控制电压的第二驱动功率驱动的第二部分 。 第一驱动功率可以由作为控制电压的函数的驱动电流形式的第一电力轨提供。 第二驱动功率可以由基本上与控制电压无关的基本上恒定的电压形式的第二电力轨提供。

公开(公告)号：US20110298556A1

公开(公告)日：2011-12-08

申请号：US12795661

申请日：2010-06-08

申请人： Yung-Ching Lin ,  Chia-Chun Hsu

发明人： Yung-Ching Lin ,  Chia-Chun Hsu

IPC分类号： H03L1/00

CPC分类号： H03L1/022

摘要： A voltage source circuit for a crystal oscillation circuit is provided, in which the voltage source circuit and the crystal oscillation circuit are formed with the same process. The voltage source circuit includes a current source, a first PMOS, a first NMOS and a regulator unit. The current source is coupled between a voltage source and an output terminal, in which the output terminal outputs a reference voltage. Both of the gates and drains of the first PMOS and the NMOS are coupled to each other, and the first PMOS and the first NMOS are coupled between the output terminal and a ground. The regulator unit generates a work voltage to the crystal oscillation circuit as a voltage source of the crystal oscillation circuit according to the reference voltage.

摘要翻译： 提供了一种用于晶体振荡电路的电压源电路，其中电压源电路和晶体振荡电路以相同的工艺形成。 电压源电路包括电流源，第一PMOS，第一NMOS和调节器单元。 电流源耦合在电压源和输出端之间，其中输出端输出参考电压。 第一PMOS和NMOS的栅极和漏极都彼此耦合，并且第一PMOS和第一NMOS耦合在输出端和地之间。 调节器单元根据参考电压产生作为晶体振荡电路的电压源的晶体振荡电路的工作电压。

公开(公告)号：US08063711B2

公开(公告)日：2011-11-22

申请号：US12876739

申请日：2010-09-07

申请人： Sehat Sutardja

发明人： Sehat Sutardja

IPC分类号： H03L1/00

CPC分类号： H03L1/027 ,  H01L23/34 ,  H01L2224/05553 ,  H01L2224/49175 ,  H01L2924/1461 ,  H01L2924/16152 ,  H01L2924/16235 ,  H01L2924/3011 ,  H03L1/026 ,  H03L5/00 ,  H03L7/07 ,  H03L7/1974 ,  H03L7/1976 ,  H01L2924/00

摘要： A crystal oscillator emulator integrated circuit includes a first temperature sensor configured to sense a first temperature of the crystal oscillator emulator integrated circuit. The memory is configured to (i) store calibration parameters and (ii) select at least one of the calibration parameters based on the first temperature. A semiconductor oscillator is configured to generate an output signal, wherein (i) the output signal has a frequency and an amplitude and (ii) the frequency is based on the at least one of the calibration parameters. An amplitude adjustment module is configured to (i) compare the amplitude to a predetermined amplitude and (ii) generate a control signal to adjust the amplitude based on the comparison.

摘要翻译： 晶体振荡器模拟器集成电路包括被配置为感测晶体振荡器仿真器集成电路的第一温度的第一温度传感器。 存储器被配置为（i）存储校准参数，以及（ii）基于第一温度选择至少一个校准参数。 半导体振荡器被配置为产生输出信号，其中（i）输出信号具有频率和幅度，以及（ii）频率基于至少一个校准参数。 幅度调整模块被配置为（i）将幅度与预定幅度进行比较，并且（ii）基于该比较产生控制信号以调整振幅。

公开(公告)号：US07982551B2

公开(公告)日：2011-07-19

申请号：US12294177

申请日：2007-03-23

申请人： Mineyuki Iwaida ,  Yasuo Oba ,  Takeshi Fujii

发明人： Mineyuki Iwaida ,  Yasuo Oba ,  Takeshi Fujii

IPC分类号： H03L1/00

CPC分类号： H03L1/023 ,  H03L7/099 ,  H03L7/113 ,  H03L7/18

摘要： A VCO circuit includes a temperature detector circuit, a voltage generator circuit, a switch, a resonance circuit and an oscillator. The temperature detector detects a temperature, and the voltage generator circuit generates a voltage for coarse adjustment corresponding to the detected temperature and outputs the same voltage. The switch selects one of a DC voltage for fine adjustment and the voltage for coarse adjustment. The resonance circuit includes a varactor diode having a capacitance value adjusted based on the voltage selected by the switch, capacitors and an inductor, and has a predetermined resonance frequency. The oscillator generates an oscillation signal having an oscillation frequency corresponding to the resonance frequency by using the resonance circuit and outputs the same signal.

摘要翻译： VCO电路包括温度检测器电路，电压发生器电路，开关，谐振电路和振荡器。 温度检测器检测温度，并且电压发生器电路根据检测到的温度产生用于粗调的电压并输出相同的电压。 开关选择直流电压之一进行微调和粗调电压。 谐振电路包括基于由开关选择的电压，电容器和电感器调整的电容值的变容二极管，并具有预定的谐振频率。 振荡器通过使用谐振电路产生具有与谐振频率对应的振荡频率的振荡信号，并输出相同的信号。

公开(公告)号：US07982549B1

公开(公告)日：2011-07-19

申请号：US12630931

申请日：2009-12-04

申请人： Paul J. Husted ,  Manev Luthra ,  Wen-Hsing Chen

发明人： Paul J. Husted ,  Manev Luthra ,  Wen-Hsing Chen

IPC分类号： H03L1/00 ,  H03L1/02

CPC分类号： H03L1/00 ,  H03L1/02

摘要： A system may include a first circuit configured to generate a first clock having a first period of oscillation, and a second circuit configured to generate a second clock having a second period of oscillation, where the difference (ΔT) between the first period of oscillation and the second period of oscillation remains within a specified limit even during variations in temperature and/or during variations in the supply voltage. The system may further include a control circuit, which may receive the first clock and the second clock, and adjust, according to ΔT, a first target parameter corresponding to a first number of cycles of the first clock, when a current cycle count of the second clock reaches a second target parameter corresponding to a second number of cycles of the second clock. The control circuit may also adjust, according to ΔT, the second target parameter when the current cycle count of the second clock reaches the second target parameter, and generate, based on counted cycles of the second clock, an output clock having an output period higher than the first period and the second period.

摘要翻译： 系统可以包括被配置为产生具有第一振荡周期的第一时钟的第一电路和被配置为产生具有第二振荡周期的第二时钟的第二电路，其中第一时钟周期之间的差（＆Dgr; T） 振荡和第二振荡周期即使在温度变化和/或电源电压变化期间也保持在规定的极限内。 该系统还可以包括控制电路，其可以接收第一时钟和第二时钟，并且当当前周期计数时，根据＆Dgr; T调整对应于第一时钟的第一个周期的第一目标参数 第二时钟的第二时钟的第二个目标参数对应于第二时钟的第二个周期数。 当第二时钟的当前周期计数达到第二目标参数时，控制电路还可以根据＆Dgr; T调整第二目标参数，并且基于第二时钟的计数周期生成具有输出的输出时钟 期间高于第一期和第二期。

公开(公告)号：US07907028B1

公开(公告)日：2011-03-15

申请号：US12366582

申请日：2009-02-05

申请人： Robert Mack ,  Timothy Chen

发明人： Robert Mack ,  Timothy Chen

IPC分类号： H03B28/00 ,  H03K5/01 ,  H03L1/00

CPC分类号： G06F1/022 ,  G06F1/0328 ,  G06F1/08 ,  H03B28/00 ,  H03B2200/0088 ,  H03L1/00 ,  H03L7/0994

摘要： A method for compensating NCO jitter by changing a step value used to increment an accumulator in the NCO to make up for inaccuracies, or jitters. In one approach, a remainder in the accumulator may be monitored and a compensated clock close to the current edge of an ideal clock may be generated. In another approach, a compensated clock close to the next edge of the ideal clock may be generated after the current edge of the ideal clock is missed. The step value may be stored in a memory, which may be a register. A jitter compensator may include a comparator for monitoring the remainder in the accumulator or a detector for detecting whether an ideal clock has been missed. The jitter compensator may also change the step value to a step value for a faster clock to compensate jitter.

摘要翻译： 一种用于通过改变用于增加NCO中的累加器的步长值来补偿NCO抖动以补偿不准确或不稳定的方法。 在一种方法中，可以监视累加器中的余数，并且可以产生接近理想时钟的当前边缘的补偿时钟。 在另一种方法中，在理想时钟的当前边缘被错过之后，可以产生靠近理想时钟的下一个边缘的补偿时钟。 步数值可以存储在可以是寄存器的存储器中。 抖动补偿器可以包括用于监视累加器中的余数的比较器或用于检测是否错过理想时钟的检测器。 抖动补偿器还可以将步长值改变为更快时钟的步进值以补偿抖动。

公开(公告)号：US07764131B1

公开(公告)日：2010-07-27

申请号：US12236456

申请日：2008-09-23

申请人： Manu Seth ,  David Brubaker ,  Andrew McCraith ,  Richard Steven Miller ,  Mir Bahram Ghaderi

发明人： Manu Seth ,  David Brubaker ,  Andrew McCraith ,  Richard Steven Miller ,  Mir Bahram Ghaderi

IPC分类号： H03L1/00 ,  H03K3/00

CPC分类号： H03L1/027

摘要： A frequency-control circuit, which is configured to receive a first signal having a first untuned frequency from a first oscillator, and to alter one or more pulses of the first signal to tune an output frequency of an output clock signal to have an average frequency at the desired target frequency. In some embodiments, the two oscillators of intentionally different frequencies are periodically switched at a duty factor, which is dependent on an absolute temperature, to generate a calibrated, precise, and temperature-stable clock.

摘要翻译： 一种频率控制电路，其被配置为从第一振荡器接收具有第一未调谐频率的第一信号，并且改变第一信号的一个或多个脉冲以调谐输出时钟信号的输出频率以具有平均频率 在所需的目标频率。 在一些实施例中，有意不同频率的两个振荡器以取决于绝对温度的占空系数周期性地切换，以产生校准的，精确的和温度稳定的时钟。

公开(公告)号：US20100171744A1

公开(公告)日：2010-07-08

申请号：US12600916

申请日：2008-05-23

申请人： Kiyohiko Kawano ,  Hiroshi Noge ,  Hideki Ueda

发明人： Kiyohiko Kawano ,  Hiroshi Noge ,  Hideki Ueda

IPC分类号： G09G5/22 ,  H03L1/00 ,  G02B26/10

CPC分类号： G02B26/0841 ,  H02N1/006

摘要： Provided is an oscillating device, which can adjust the oscillation angle and the phase of a movable plate easily with a simple constitution. A light scanning device acting as the oscillating device comprises a mirror element for oscillating the movable plate having a mirror film, a control circuit having a duty ratio adjusting unit and a function to change the duty ratio of the pulse voltage, so that it applies the pulse voltage thereby to drive a vertical comb of the mirror element, and an oscillation detecting unit for detecting the oscillations of the movable plate. On the bases of the movable plate oscillations detected by the oscillation detecting unit, the control circuit controls the duty ratio adjusting unit thereby to change the duty ratio of the pulse voltage. When the pulse voltage having the changed duty ratio is applied to the mirror element, the period of applying the voltage to the vertical comb at the oscillating time of the movable plate changes so that the phase and the oscillation angle of the oscillations of the movable plate change. By the feed-back control of the duty ratio according to the oscillations of the movable plate, the movable plate can be controlled to oscillate in the proper phase and at the proper oscillation angle.

摘要翻译： 提供了一种振荡装置，其可以以简单的结构容易地调节可动板的摆动角度和相位。 用作振荡装置的光扫描装置包括用于使具有镜面膜的可动板振荡的反射镜元件，具有占空比调节单元的控制电路和改变脉冲电压的占空比的功能， 脉冲电压，从而驱动镜元件的垂直梳齿;以及振动检测单元，用于检测可动板的振荡。 在由振荡检测单元检测到的可动板振荡的基础上，控制电路控制占空比调节单元，从而改变脉冲电压的占空比。 当具有改变的占空比的脉冲电压被施加到反射镜元件时，在可移动板的振荡时间施加到垂直梳的电压的周期改变，使得可动板的振荡的相位和振荡角 更改。 通过根据可动板的振荡的占空比的反馈控制，能够使可动板以适当的相位和适当的摆动角度进行摆动。