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    Quadrature voltage controlled oscillators with phase shift detector
    21.
    发明申请
    Quadrature voltage controlled oscillators with phase shift detector 有权

    公开(公告)号：US20060238259A1

    公开(公告)日：2006-10-26

    申请号：US11473620

    申请日：2006-06-22

    Applicant: Emmanuel Metaxakis

    Inventor： Emmanuel Metaxakis

    IPC: H03L7/00

    CPC classification number: H03L7/00 ,  H03B5/1215 ,  H03B5/1231 ,  H03B5/124 ,  H03B27/00 ,  H03B2201/025 ,  H03J2200/10

    Abstract: In wireless application there is made use of a quadrature oscillators that generate signals that are capable of oscillating at quadrature of each other. The quadrature oscillator is comprised of two differential modified Colpitts oscillators. A capacitor bank allows for the selection of a desired frequency from a plurality of discrete possible frequencies. The quadrature oscillator is further coupled with a phase-error detector connected at the point-of-use of the generated ‘I’ and ‘Q’ channels and through the control of current sources provides corrections means to ensure that the phase shift at the point-of-use remains at the desired ninety degrees.

    Integrated clock generator and timing/frequency reference
    22.
    发明申请
    Integrated clock generator and timing/frequency reference 有权
    集成时钟发生器和定时/频率参考

    公开(公告)号：US20060152293A1

    公开(公告)日：2006-07-13

    申请号：US11384758

    申请日：2006-03-20

    Applicant: Michael McCorquodale ,  Scott Pernia ,  Sundus Kubba ,  Justin O'Day ,  Gordon Carichner

    Inventor： Michael McCorquodale ,  Scott Pernia ,  Sundus Kubba ,  Justin O'Day ,  Gordon Carichner

    IPC: H03B1/00

    CPC classification number: G06F1/04 ,  G06F1/08 ,  H03B5/06 ,  H03B5/1203 ,  H03B5/1215 ,  H03B5/1218 ,  H03B5/1228 ,  H03B5/1253 ,  H03B5/1256 ,  H03B5/1265 ,  H03B2201/025 ,  H03J1/0008 ,  H03J2200/10 ,  H03L1/022 ,  H03L3/00 ,  H03L7/08 ,  H03L7/0812 ,  H03L7/0891 ,  H03L7/099

    Abstract: In various embodiments, the invention provides a clock generator and/or a timing and frequency reference using an LC-oscillator topology, having a frequency controller to control and provide a stable resonant frequency, which is integrated with other, second circuitry such as a processor or controller. Frequency stability is provided over variations in a selected parameter such as temperature and fabrication process variations. The various apparatus embodiments include a sensor adapted to provide a signal in response to at least one parameter of a plurality of parameters; and a frequency controller adapted to modify the resonant frequency in response to the second signal. In exemplary embodiments, the sensor is implemented as a current source responsive to temperature fluctuations, and the frequency controller is implemented as a plurality of controlled reactance modules which are selectively couplable to the resonator or to one or more control voltages. The controlled reactance modules may include fixed or variable capacitances or inductances, and may be binary weighted. Arrays of resistive modules are also provided, to generate one or more control voltages.

    Abstract translation: 在各种实施例中，本发明提供使用LC振荡器拓扑的时钟发生器和/或定时和频率参考，其具有频率控制器以控制和提供稳定的谐振频率，其与其它第二电路（例如处理器 或控制器。 提供了频率稳定性，如选择的参数（如温度和制造工艺变化）的变化。 各种装置实施例包括适于响应于多个参数的至少一个参数提供信号的传感器; 以及频率控制器，其适于响应于所述第二信号来修改所述谐振频率。 在示例性实施例中，响应于温度波动将传感器实现为电流源，并且频率控制器被实现为可选择地耦合到谐振器或一个或多个控制电压的多个受控电抗模块。 受控电抗模块可以包括固定或可变电容或电感，并且可以是二进制加权的。 还提供了电阻模块的阵列，以产生一个或多个控制电压。

    Voltage-controlled oscillator, radio communication apparatus and voltage-controlled oscillation method
    25.
    发明申请
    Voltage-controlled oscillator, radio communication apparatus and voltage-controlled oscillation method 有权
    压控振荡器，无线通信装置和压控振荡方法

    公开(公告)号：US20050190002A1

    公开(公告)日：2005-09-01

    申请号：US10676654

    申请日：2003-10-01

    Applicant: Koji Takinami ,  Hisashi Adachi ,  Tokio Endoh

    Inventor： Koji Takinami ,  Hisashi Adachi ,  Tokio Endoh

    IPC: H03B1/00 ,  H03B5/00 ,  H03B5/12 ,  H03B7/06 ,  H03C3/22 ,  H04B1/16

    CPC classification number: H03B5/1215 ,  H03B5/1228 ,  H03B5/1253 ,  H03B5/1265 ,  H03B5/1293 ,  H03B2201/025 ,  H03L7/099

    Abstract: A voltage-controlled oscillator having an inductor circuit, n pieces (n is two or more) of variable capacitance circuit having variable capacitance elements, negative resistance circuits, and reference voltage generation means of generating a reference voltage from a power supply voltage, and wherein a predetermined reference voltage is inputted to some terminals of the variable capacitance elements of the n pieces of variable capacitance circuit, a control voltage is inputted to the other terminals thereof, and of the variable capacitance elements of the n pieces of variable capacitance circuits, the predetermined reference voltage inputted to some terminals of the variable capacitance elements of at least two pieces of the variable capacitance circuit is different.

    Abstract translation: 一种具有电感电路的压控振荡器，具有可变电容元件的可变电容电路的n个（n为2个以上），负电阻电路和从电源电压生成基准电压的基准电压生成单元，其中， 将预定的参考电压输入到n个可变电容电路的可变电容元件的一些端子，将一个控制电压输入到其它端子，以及n个可变电容电路的可变电容元件， 输入至少两个可变电容电路的可变电容元件的一些端子的预定参考电压是不同的。

    Large gain range, high linearity, low noise MOS VGA
    27.
    发明授权
    Large gain range, high linearity, low noise MOS VGA 有权
    大增益范围，高线性度，低噪声MOS VGA

    公开(公告)号：US06759904B2

    公开(公告)日：2004-07-06

    申请号：US10183552

    申请日：2002-06-28

    Applicant: Arya R. Behzad

    Inventor： Arya R. Behzad

    IPC: H03F345

    CPC classification number: H03F1/3211 ,  H01F17/0006 ,  H01F17/0013 ,  H01F2017/0026 ,  H01F2017/0053 ,  H01F2021/125 ,  H01L23/5227 ,  H01L27/0248 ,  H01L27/08 ,  H01L2924/0002 ,  H01L2924/3011 ,  H03B5/364 ,  H03B2201/025 ,  H03B2201/0266 ,  H03D7/161 ,  H03D7/18 ,  H03G1/0029 ,  H03H11/1291 ,  H03J1/0075 ,  H03J3/04 ,  H03J3/08 ,  H03J3/185 ,  H03J2200/10 ,  H03L1/023 ,  H03L7/10 ,  H03L7/23 ,  H01L2924/00

    Abstract: An integrated receiver with channel selection and image rejection is substantially implemented on a single CMOS integrated circuit. A receiver front end provides programable attenuation and a programable gain low noise amplifier. LC filters integrated onto the substrate in conjunction with image reject mixers provide image frequency rejection. Filter tuning and inductor Q compensation over temperature are performed on chip. Active filters utilize multi track spiral inductors with shields to increase circuit Q. Frequency planning provides additional image rejection. Local oscillator signal generation methods on chip reduce distortion. A PLL generates needed out of band LO signals. Direct synthesis generates in band LO signals. PLL VCOs are centered automatically. A differential crystal oscillator provides a frequency reference. Differential signal transmission throughout the receiver is used. ESD protection is provided by a pad ring and ESD clamping structure. Shunts utilize a gate boosting at each pin to discharge ESD build up. An IF VGA utilizes distortion cancellation achieved with cross coupled differential pair amplifiers having their Vds dynamically modified in conjunction with current steering of the differential pairs sources.

    Abstract translation: 具有通道选择和图像抑制的集成接收器基本上在单个CMOS集成电路上实现。 接收机前端提供可编程衰减和可编程增益低噪声放大器。 与图像抑制混合器一起集成到衬底上的LC滤波器提供图像频率抑制。 过滤器调谐和电感Q补偿温度在芯片上执行。 有源滤波器利用具有屏蔽的多轨螺旋电感器来增加电路Q.频率规划提供额外的图像抑制。 本地振荡器信号产生方法在芯片上减少失真。 PLL产生所需的带外LO信号。 直接合成产生带内LO信号。 PLL VCO自动居中。 差分晶体振荡器提供频率参考。 使用整个接收机的差分信号传输。 ESD保护由衬垫环和ESD夹紧结构提供。 分流器利用每个引脚上的门极升压来放电ESD积聚。 IF VGA利用交叉耦合差分对放大器实现的失真消除，其具有与差分对源的电流转向结合动态修改的Vds。

    Voltage controlled oscillator with automatic center frequency calibration
    29.
    发明授权
    Voltage controlled oscillator with automatic center frequency calibration 失效
    具有自动中心频率校准的压控振荡器

    公开(公告)号：US06556093B2

    公开(公告)日：2003-04-29

    申请号：US09950803

    申请日：2001-09-13

    Applicant: Jan Frans Lucien Craninckx ,  Mark Maria Albert Ingels ,  Frank Nico Lieven Op't Eynde ,  Joannes Mathilda Josephus Sevenhans

    Inventor： Jan Frans Lucien Craninckx ,  Mark Maria Albert Ingels ,  Frank Nico Lieven Op't Eynde ,  Joannes Mathilda Josephus Sevenhans

    IPC: H03B500

    CPC classification number: H03L7/099 ,  H03B2201/025 ,  H03J2200/10 ,  H03L7/10 ,  H03L7/105

    Abstract: A voltage controlled oscillator with automatic center frequency calibration. The frequency range of the oscillator is increased by switchable capacitor circuits which add or remove extra capacitors in parallel with the variable capacitor of the resonant circuit. Different voltage versus frequency characteristics are obtained. The switchable capacitor circuits are controlled by a detection circuit that sends a reset pulse to a feedback circuit of the VCO when a control voltage from the feedback circuit reaches predetermined low or high voltage limits of the characteristics. Upon reception of the reset pulse, the feedback circuit changes the control voltage from the reached limit into an intermediate voltage between the low and high voltage limits. The control voltage is reset in the middle of a voltage versus frequency characteristic onto which the output frequency is also centered. The VCO includes a selection circuit adapted to immediately change the value of the control voltage.

    Abstract translation: 具有自动中心频率校准的压控振荡器。 振荡器的频率范围由可切换电容器电路增加，该电路与谐振电路的可变电容器并联地增加或除去额外的电容器。 获得不同的电压对频率特性。 可转换电容器电路由检测电路控制，当来自反馈电路的控制电压达到预定的特性的低或高电压极限时，检测电路向VCO的反馈电路发送复位脉冲。 在接收到复位脉冲时，反馈电路将控制电压从达到的极限改变为低电压极限和高电压极限之间的中间电压。 控制电压在输出频率也居中的电压对频率特性的中间被复位。 VCO包括适于立即改变控制电压的值的选择电路。

    Direct digitally tunable microwave oscillators and filters
    30.
    发明申请
    Direct digitally tunable microwave oscillators and filters 失效

    公开(公告)号：US20030064701A1

    公开(公告)日：2003-04-03

    申请号：US10269709

    申请日：2002-10-10

    Applicant: Bridge Wave Communications, Inc.

    Inventor： Eliezer Pasternak

    IPC: H04B001/26

    CPC classification number: H04B1/18 ,  H03B2201/0208 ,  H03B2201/025

    Abstract: A tunable element in the microwave frequency range is described that may include one or more tunable elements that are directly digitally controlled by a digital bus connecting a digital control circuit to each controlled element. In particular, each digital signal is filtered by a digital isolation technique so that the signal reaches the tunable elements with very low noise. The low noise digital signals are then converted to analog control voltages. The direct D/A conversion is accomplished by a special D/A converter which is manufactured as an integral part of a substrate. This D/A converter in accordance with the invention may consist of a resistor ladder or a directly digitally controlled capacitor. The direct digitally controlled capacitor may be a cantilevered type capacitor having multiple separate electrodes or sub-plates representing binary bits that may be used to control the capacitor. A low cost microwave oscillator is disclosed in which some of the filters and oscillators are direct digitally tuned elements.

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