公开(公告)号：US07932789B2

公开(公告)日：2011-04-26

申请号：US12432743

申请日：2009-04-29

Applicant: Robert Hay

Inventor： Robert Hay

IPC: H03B5/36

CPC classification number: H03B5/326 ,  H03B2201/025 ,  H03B2201/0291 ,  H03B2201/031 ,  H03H9/6403

Abstract: A frequency adjustable surface acoustic wave oscillator uses circuitry in which the phase relationship between the corresponding input and output signals and the voltage applied to or received by transducer fingers is controlled in such a manner that the frequency of the surface acoustic wave oscillator is arbitrarily controlled over a wide range by digital means. This provides an oscillator that exhibits a wide tunable frequency range while providing low phase noise.

Abstract translation: 频率可调声表面波振荡器使用电路，其中相应的输入和输出信号之间的相位关系以及施加到或由换能器指状态接收的电压被控制为使声表面波振荡器的频率被任意控制 数字化的广泛范围。 这提供了一个振荡器，具有宽的可调谐频率范围，同时提供低相位噪声。

公开(公告)号：US07782145B2

公开(公告)日：2010-08-24

申请号：US12057743

申请日：2008-03-28

Applicant: Ahmadreza Rofougaran

Inventor： Ahmadreza Rofougaran

IPC: H03B5/08

CPC classification number: H03L7/08 ,  H03B2201/025 ,  H03J2200/10 ,  H03L7/085 ,  H03L7/099 ,  H03L7/1806 ,  H03L2207/06

Abstract: Aspects of a method and system for frequency tuning based on characterization of an oscillator are provided. In this regard, a frequency of an oscillator in an integrated circuit may be controlled based on a first digital control word, a frequency of a tuned circuit may be controlled based on a second digital control word, and the second control word may be determined utilizing a mapping between the first control word and the second control word. The frequency of the oscillator and the tuned circuit may be controlled by adjusting a capacitance of the oscillator and tuned circuit, respectively. The mapping may be based on a relationship between the oscillator and the tuned circuit, such as logical and/or mathematical relationship between the capacitance of the oscillator and the capacitance of the tuned circuit and/or the relationship between the frequency of the oscillator and the frequency of the tuned circuit.

Abstract translation: 提供了基于振荡器特征的用于频率调谐的方法和系统的方面。 在这方面，可以基于第一数字控制字来控制集成电路中的振荡器的频率，可以基于第二数字控制字来控制调谐电路的频率，并且可以利用第二数字控制字来确​​定第二控制字 第一控制字和第二控制字之间的映射。 可以通过分别调整振荡器和调谐电路的电容来控制振荡器和调谐电路的频率。 该映射可以基于振荡器和调谐电路之间的关系，例如振荡器的电容和调谐电路的电容之间的逻辑和/或数学关系和/或振荡器的频率与 调谐电路的频率。

公开(公告)号：US07728676B2

公开(公告)日：2010-06-01

申请号：US12112914

申请日：2008-04-30

Applicant: Lalitkumar Nathawad ,  Justin Hwang

Inventor： Lalitkumar Nathawad ,  Justin Hwang

IPC: H03L7/00

CPC classification number: H03L7/099 ,  H03B5/1212 ,  H03B5/1228 ,  H03B5/1253 ,  H03B5/1265 ,  H03B2201/025 ,  H03J2200/10

Abstract: A voltage-controlled oscillator (VCO) comprising a first circuit, a second circuit, a comparator circuit, and a control unit. The first circuit can determine an output common mode voltage associated with an output of the VCO. The second circuit can generate an upper control voltage limit and a lower control voltage limit associated with a control voltage received by the VCO based, at least in part, on the output common mode voltage. The comparator circuit can compare the control voltage to the upper and lower control voltage limits. The control unit can determine whether to change a switched capacitance associated with the VCO based, at least in part, on whether the control voltage is outside the upper and lower control voltage limits, thereby maintaining an optimal region of operation for the control voltage.

Abstract translation: 一种包括第一电路，第二电路，比较器电路和控制单元的压控振荡器（VCO）。 第一电路可以确定与VCO的输出相关联的输出共模电压。 第二电路可以至少部分地基于输出共模电压产生与VCO接收的控制电压相关联的较高控制电压限制和较低控制电压限制。 比较器电路可以将控制电压与上下限电压限制进行比较。 至少部分地基于控制电压是否超出上限和下限控制电压限制，控制单元可以确定是否改变与VCO相关联的开关电容，从而保持控制电压的最佳操作区域。

公开(公告)号：US07701304B2

公开(公告)日：2010-04-20

申请号：US12035250

申请日：2008-02-21

Applicant: Takayuki Tsukizawa ,  Koji Takinami

Inventor： Takayuki Tsukizawa ,  Koji Takinami

IPC: H03B5/18

CPC classification number: H03B5/1228 ,  H03B5/1215 ,  H03B5/1243 ,  H03B5/1265 ,  H03B5/1293 ,  H03B2201/025 ,  H03J2200/10

Abstract: A voltage controlled oscillator has a reference voltage generation section for generating a plurality of reference voltage based on a power supply voltage. Reference voltages Vref1, Vref2, and Vref3 are inputted to variable capacitance circuits A, B, and C, respectively. Reference voltages Vref1, Vref2, and Vref3 each has a fixed value, and a difference between the first reference voltage Vref1 and the second reference voltage Vref2 and a difference between the second reference voltage Vref2 and the third reference voltage Vref3 represent values different from each other. A control voltage Vt for feedback-controlling an oscillation frequency is inputted to each of the other of the terminals of the variable capacitance element of each of the n variable capacitance circuits such that the control voltage Vt having the same value is inputted to the each of the other of the terminals.

Abstract translation: 压控振荡器具有用于基于电源电压产生多个参考电压的参考电压产生部分。 参考电压Vref1，Vref2和Vref3分别输入到可变电容电路A，B和C. 参考电压Vref1，Vref2和Vref3各自具有固定值，并且第一参考电压Vref1和第二参考电压Vref2之间的差以及第二参考电压Vref2与第三参考电压Vref3之间的差表示彼此不同的值 。 将用于反馈控制振荡频率的控制电压Vt输入到n个可变电容电路中的每一个的可变电容元件的另一个端子中，使得具有相同值的控制电压Vt被输入到 另一个终端。

公开(公告)号：US07679463B2

公开(公告)日：2010-03-16

申请号：US11805368

申请日：2007-05-23

Applicant: Scott Michael Pernia ,  Michael Shannon McCorquodale ,  Sundus Kubba ,  Justin O'Day ,  Gordon Carichner ,  Eric David Marsman

Inventor： Scott Michael Pernia ,  Michael Shannon McCorquodale ,  Sundus Kubba ,  Justin O'Day ,  Gordon Carichner ,  Eric David Marsman

IPC: H03B5/04 ,  H03B1/00

CPC classification number: H03L1/022 ,  H03B5/1212 ,  H03B5/1221 ,  H03B5/1228 ,  H03B5/124 ,  H03B2200/0038 ,  H03B2201/025 ,  H03J2200/10 ,  H03L1/023 ,  H03L7/089

Abstract: Exemplary embodiments of the invention provide a reference harmonic oscillator integrated circuit having three or more terminals, with systems and methods for calibrating the harmonic oscillator to a selected first frequency using a limited number of terminals. An exemplary apparatus comprises: a reference harmonic oscillator, a first terminal to receive a supply voltage, a second terminal to receive a ground potential, a third terminal to provide an output signal having an output frequency, and may also include a fourth terminal. One of the first, second, third or fourth terminals is further adapted for input of a calibration of the first frequency. The exemplary apparatus may enter calibration and testing modes in response to various commands such as a calibration mode signal, and may also be configured through one of the terminals for output frequency selection, spread-spectrum output, and output voltage levels.

Abstract translation: 本发明的示例性实施例提供了具有三个或更多个端子的参考谐波振荡器集成电路，其具有使用有限数量的端子将谐波振荡器校准为所选择的第一频率的系统和方法。 示例性装置包括：参考谐波振荡器，用于接收电源电压的第一端子，用于接收地电位的第二端子，第三端子以提供具有输出频率的输出信号，并且还可以包括第四端子。 第一，第二，第三或第四端子中的一个进一步适于输入第一频率的校准。 示例性装置可以响应于诸如校准模式信号的各种命令而进入校准和测试模式，并且还可以通过用于输出频率选择，扩频输出和输出电压电平的一个端子进行配置。

公开(公告)号：US20100009645A1

公开(公告)日：2010-01-14

申请号：US12504874

申请日：2009-07-17

Applicant: Lawrence Der ,  Dana Taipale ,  Scott Willingham

Inventor： Lawrence Der ,  Dana Taipale ,  Scott Willingham

IPC: H04B1/18 ,  H03L7/00

CPC classification number: H03B5/32 ,  H03B2201/025 ,  H03D7/165 ,  H03J1/0008 ,  H03J2200/10

Abstract: In one embodiment, the present invention includes a method for determining if a frequency control instruction would cause a first capacitor bank to reach a limit and adjusting the first capacitor bank in a first direction using a calibration value and adjusting a second capacitor bank in a second direction if the first capacitor bank would reach the limit. Furthermore, the calibration value may be calculated and stored in accordance with other embodiments. In such manner, small changes in capacitance and correspondingly small changes in frequency may be effected.

Abstract translation: 在一个实施例中，本发明包括一种用于确定频率控制指令是否会使第一电容器组达到限制并且使用校准值在第一方向上调整第一电容器组并在第二电容器组中调整第二电容器组的方法 方向如果第一个电容器组达到极限。 此外，可以根据其他实施例来计算和存储校准值。 以这种方式，可以实现电容的小的变化和相应的小的频率变化。

公开(公告)号：US07639092B2

公开(公告)日：2009-12-29

申请号：US11837042

申请日：2007-08-10

Applicant: David H. Shen ,  Ann P. Shen

Inventor： David H. Shen ,  Ann P. Shen

IPC: H03B5/36

CPC classification number: H03B5/36 ,  H03B2201/025 ,  H03J2200/10

Abstract: Embodiments feature techniques and systems for analog and digital tuning of crystal oscillators. In one aspect, some implementations feature a method for tuning a frequency of a crystal oscillator that can include adjusting the tuning frequency of the crystal oscillator from a nominal frequency via a switched-capacitor frequency tuning circuit, the switched-capacitor frequency tuning circuit can have switchable sections to adjust the tuning of the crystal oscillator. The method can include controlling an analog control input that is coupled to a varactor within each of the switchable sections, where each of the switchable sections can include a fixed capacitor in series with the varactor and a switch. The method can involve controlling a digital control input, where the digital control input can electrically connect or disconnect one or more of the switchable sections from the crystal. There can be independent control between the digital and analog tuning mechanisms.

Abstract translation: 实施例用于晶体振荡器的模拟和数字调谐的技术和系统。 一方面，一些实施方式的特征在于一种用于调谐晶体振荡器的频率的方法，该方法可以包括通过开关电容器频率调谐电路从标称频率调整晶体振荡器的调谐频率，开关电容器频率调谐电路可以具有 可切换部分来调节晶体振荡器的调谐。 该方法可以包括控制耦合到每个可切换部分内的变容二极管的模拟控制输入，其中每个可切换部分可以包括与变容二极管串联的固定电容器和开关。 该方法可以涉及控制数字控制输入，其中数字控制输入可以将一个或多个可切换部分与晶体电连接或断开。 数字和模拟调谐机制之间可以独立控制。

公开(公告)号：US20090224843A1

公开(公告)日：2009-09-10

申请号：US12045224

申请日：2008-03-10

Applicant: Liviu-Mihai Radoias ,  Radu H. Iacob ,  Iulian Dumitru

Inventor： Liviu-Mihai Radoias ,  Radu H. Iacob ,  Iulian Dumitru

IPC: H03B5/32

CPC classification number: H03B5/32 ,  H03B2201/025 ,  H03J2200/10

Abstract: A crystal oscillator circuit having a parallel resonant frequency that is adjustable by switching trim capacitors in parallel with a crystal.

Abstract translation: 具有并联谐振频率的晶体振荡器电路，其可通过与晶体并联开关微调电容器来调节。

公开(公告)号：US07573342B2

公开(公告)日：2009-08-11

申请号：US11781145

申请日：2007-07-20

Applicant: Christian Grewing ,  Stefan Heinrich van Waasen ,  Emericks Anders

Inventor： Christian Grewing ,  Stefan Heinrich van Waasen ,  Emericks Anders

IPC: H03B1/00

CPC classification number: H03L7/0995 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03B2201/0208 ,  H03B2201/025 ,  H03J2200/10

Abstract: A VCO device is described that has pre-compensation. Digitally switchable compensation capacitors are selectively activated to adjust operation of the VCO to mitigate undesirable operational effects. In some example embodiments, the digitally switchable compensation capacitors of the VCO are adjusted to compensate for the effects of activating (from a quiescent state) an output buffer driven by the VCO.

Abstract translation: 描述了具有预补偿的VCO器件。 选择性地激活数字可切换补偿电容器以调节VCO的操作以减轻不期望的操作效果。 在一些示例实施例中，调整VCO的数字可切换补偿电容器以补偿由VCO驱动的输出缓冲器激活（从静止状态）的影响。

公开(公告)号：US07468620B2

公开(公告)日：2008-12-23

申请号：US11462802

申请日：2006-08-07

Applicant: Tsuoe-Hsiang Liao

Inventor： Tsuoe-Hsiang Liao

IPC: H03B19/00

CPC classification number: G11C17/18 ,  G11C17/16 ,  H01L23/5256 ,  H01L2924/0002 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1253 ,  H03B5/1268 ,  H03B2201/025 ,  H03D13/004 ,  H03K3/0315 ,  H01L2924/00

Abstract: A frequency generator apparatus and a control circuit thereof are provided. The frequency generator apparatus comprises the control circuit and a frequency generator, wherein the control circuit contains an electric fuse (efuse). The control circuit outputs an enabling signal according to the state of the efuse. The frequency generator is coupled to the control circuit, receives the enabling signal, and decides to output a frequency signal or not according to the enabling signal.

Abstract translation: 提供了一种频率发生器装置及其控制电路。 频率发生器装置包括控制电路和频率发生器，其中控制电路包含电熔丝（efuse）。 所述控制电路根据所述efuse的状态输出使能信号。 频率发生器耦合到控制电路，接收使能信号，并根据使能信号决定输出频率信号。