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    Voltage controlled oscillator
    91.
    发明授权
    Voltage controlled oscillator 有权
    压控振荡器

    公开(公告)号：US07218182B2

    公开(公告)日：2007-05-15

    申请号：US10685030

    申请日：2003-10-14

    Applicant: Yoshinori Muramatsu

    Inventor： Yoshinori Muramatsu

    IPC: H03B1/00

    CPC classification number: H03B5/1228 ,  H03B5/1212 ,  H03B5/1221 ,  H03B5/124 ,  H03B5/1265 ,  H03B5/1293 ,  H03B2201/0266

    Abstract: An LC circuit section and a negative resistance section are provided for an LC-VCO. A pair of output terminals are provided for the LC circuit section and an inductor is connected between the output terminals, and two variable capacitors are connected in series to each other parallelly with the inductor. Further, the LC circuit section is provided with a pair of capacitors and a pair of switches that are connected between the capacitors and a ground potential and consist of NMOS transistors. Moreover, a switch that consists of the NMOS transistor is connected between a node, which is between one capacitor and one switch, and a node, which is between the other capacitor and the other switch, and the two nodes are connected to each other when the switch is closed.

    Abstract translation: 为LC-VCO提供LC电路部分和负电阻部分。 为LC电路部分提供一对输出端子，并且在输出端子之间连接电感器，并且两个可变电容器彼此并联连接到电感器。 此外，LC电路部分设置有一对电容器和一对连接在电容器和接地电位之间并由NMOS晶体管组成的开关。 此外，由NMOS晶体管组成的开关连接在一个电容器和一个开关之间的节点和位于另一个电容器和另一个开关之间的节点之间，并且两个节点彼此连接，当 开关关闭。

    Dual-band oscillator
    92.
    发明申请
    Dual-band oscillator 失效
    双频振荡器

    公开(公告)号：US20060255873A1

    公开(公告)日：2006-11-16

    申请号：US11389413

    申请日：2006-03-23

    Applicant: Hiroki Kobayashi

    Inventor： Hiroki Kobayashi

    IPC: H03B5/12

    CPC classification number: H03B5/1231 ,  H03B5/1218 ,  H03B5/1243 ,  H03B2200/0046 ,  H03B2200/0048 ,  H03B2201/0266

    Abstract: When two oscillation signals are output from a common terminal through switching, to reduce attenuation of the oscillation signals, a dual-band oscillator includes a first oscillating transistor for generating an oscillation signal in a first frequency band; a first inductor for supplying power to a collector of the first oscillating transistor; a first switching element for switching the first oscillating transistor; a second oscillating transistor for generating an oscillation signal in a second frequency band; a second inductor for supplying power to a collector of the second oscillating transistor; a second switching element for switching the second oscillating transistor; and an output terminal for outputting the oscillation signal in the first frequency band or in the second frequency band. The first switching element is disposed between the first inductor and the output terminal, and the second switching element is disposed between the second inductor and the output terminal.

    Abstract translation: 当通过开关从公共端子输出两个振荡信号时，为了减少振荡信号的衰减，双频带振荡器包括用于产生第一频带的振荡信号的第一振荡晶体管; 用于向第一振荡晶体管的集电极供电的第一电感器; 用于切换第一振荡晶体管的第一开关元件; 用于在第二频带中产生振荡信号的第二振荡晶体管; 用于向第二振荡晶体管的集电极供电的第二电感器; 用于切换第二振荡晶体管的第二开关元件; 以及用于输出第一频带或第二频带中的振荡信号的输出端子。 第一开关元件设置在第一电感器和输出端子之间，第二开关元件设置在第二电感器和输出端子之间。

    Clock circuit with programmable load capacitors
    93.
    发明申请
    Clock circuit with programmable load capacitors 失效
    具有可编程负载电容的时钟电路

    公开(公告)号：US20060214738A1

    公开(公告)日：2006-09-28

    申请号：US11089857

    申请日：2005-03-24

    Applicant: Wenjung Sheng ,  Shyam Somayajula ,  Xue-Mei Gong

    Inventor： Wenjung Sheng ,  Shyam Somayajula ,  Xue-Mei Gong

    IPC: H03B5/12

    CPC classification number: H03K3/0307 ,  H03B5/36 ,  H03B2201/0266 ,  H03K3/012

    Abstract: In one embodiment, the present invention includes methods and apparatus for providing initial control values to programmable load capacitors of an oscillator, such as that of a real time clock circuit. Using the initial values, the real time clock circuit may begin operation, enabling additional circuitry within an integrated circuit to begin operation. This additional circuitry may cause operating values to program the load capacitors to provide a desired reference clock based on a given system's requirements.

    Abstract translation: 在一个实施例中，本发明包括用于向诸如实时时钟电路的振荡器的可编程负载电容器提供初始控制值的方法和装置。 使用初始值，实时时钟电路可以开始运行，使集成电路中的附加电路能够开始运行。 这个额外的电路可以使操作值对负载电容器进行编程，以根据给定的系统要求提供所需的参考时钟。

    Coarse frequency tuning in a voltage controlled oscillator
    94.
    发明授权
    Coarse frequency tuning in a voltage controlled oscillator 有权
    压控振荡器中的粗频调谐

    公开(公告)号：US07113052B2

    公开(公告)日：2006-09-26

    申请号：US11046261

    申请日：2005-01-28

    Applicant: Jeremy D. Dunworth

    Inventor： Jeremy D. Dunworth

    IPC: H03B5/00 ,  H03B5/12

    CPC classification number: H03B5/1243 ,  H03B5/1206 ,  H03B5/1265 ,  H03B2201/0266 ,  H03J2200/10

    Abstract: Methods and apparatus are presented for performing coarse frequency tuning in a voltage controlled oscillator. The methods and apparatus are directed towards the use of a new voltage controlled oscillator comprising both a binary coding module and a thermometer coding module. The combination of the binary coding module and the thermometer coding module control a capacitance corresponding to a resonant tank which is used to coarse tune the frequency of the voltage controlled oscillator.

    Abstract translation: 提出了用于在压控振荡器中执行粗调频调谐的方法和装置。 该方法和装置旨在使用包括二进制编码模块和温度计编码模块的新的压控振荡器。 二进制编码模块和温度计编码模块的组合控制对应于用于粗调压控振荡器的频率的谐振槽的电容。

    Voltage-controlled oscillator circuit for direct modulation
    97.
    发明授权
    Voltage-controlled oscillator circuit for direct modulation 有权
    用于直接调制的压控振荡器电路

    公开(公告)号：US06774736B1

    公开(公告)日：2004-08-10

    申请号：US10047332

    申请日：2002-01-14

    Applicant: Ee Hong Kwek ,  Jonathon Y. Cheah

    Inventor： Ee Hong Kwek ,  Jonathon Y. Cheah

    IPC: H03B100

    CPC classification number: H03C3/0958 ,  H03B5/1805 ,  H03B2201/0208 ,  H03B2201/0266 ,  H03C3/22 ,  H03C3/225 ,  H03J2200/10 ,  H03L7/099 ,  H03L7/1974

    Abstract: A VCO circuit for a fractional-n PLL circuit is described for implementing a direct modulation scheme. An embodiment of the invention provides a bank of switchable capacitors used to stringently control the gain of the VCO (KVCO). The capacitors provide the stringent control necessary for direct modulation. The bank of switchable capacitors is used to coarsely tune the VCO circuit. A linear capacitor is placed in series with, the varactor to linearize the frequency/capacitance response of the varactor. The capacitor also serves to isolate a reference voltage that is used to bias the varactor diode to ensure the linear range of the varactor is within the voltage range of the VCO circuit power supply. The varactor is used for fine tuning of the VCO circuit. For one embodiment the input voltages to the VCO are across a resistance value sufficient to dampen noise picked up through an external loop filter.

    Abstract translation: 描述了用于分数n个PLL电路的VCO电路，用于实现直接调制方案。 本发明的实施例提供了用于严格控制VCO（KVCO）的增益的一组可切换电容器。 电容提供了直接调制所需的严格控制。 可切换电容器组用于粗调VCO电路。 线性电容器与变容二极管串联放置，以使变容二极管的频率/电容响应线性化。 电容器还用于隔离用于偏置变容二极管的参考电压，以确保变容二极管的线性范围在VCO电路电源的电压范围内。 变容二极管用于对VCO电路进行微调。 对于一个实施例，到VCO的输入电压跨过足以抑制通过外部环路滤波器拾取的噪声的电阻值。

    Tunable resonant circuit and voltage controlled oscillator using same
    98.
    发明授权
    Tunable resonant circuit and voltage controlled oscillator using same 有权
    可调谐谐振电路和压控振荡器使用相同

    公开(公告)号：US06720834B2

    公开(公告)日：2004-04-13

    申请号：US10121366

    申请日：2002-04-11

    Applicant: Evan S. McCarthy ,  Jackie Cheng

    Inventor： Evan S. McCarthy ,  Jackie Cheng

    IPC: H03B512

    CPC classification number: H03B5/08 ,  H03B2201/0208 ,  H03B2201/0266 ,  H03J2200/10

    Abstract: A programmable capacitive network for use in a tunable resonant circuit is set forth that may be used in a number of different applications, but is particularly useful in the tuning of a voltage controlled oscillator formed on a substrate, such as a semiconductor substrate or the like. The programmable capacitive network includes a plurality of capacitive elements. An interconnected network of voltage gate elements and fuse elements are interconnected with the capacitive elements to selectively connect one or more of the plurality of capacitive elements in the resonant circuit in response to at least one program control signal. In accordance with one embodiment, the voltage gate elements are diodes.

    Abstract translation: 阐述了一种用于可调谐谐振电路的可编程电容网络，可用于许多不同的应用，但是在对诸如半导体衬底等的衬底上形成的压控振荡器进行调谐特别有用 。 可编程电容网络包括多个电容元件。 电压门元件和熔丝元件的互连网络与电容元件互连，以响应于至少一个程序控制信号选择性地连接谐振电路中的多个电容元件中的一个或多个。 根据一个实施例，电压门元件是二极管。

    Adjustable filter
    99.
    发明授权
    Adjustable filter 有权
    可调式过滤器

    公开(公告)号：US06681102B1

    公开(公告)日：2004-01-20

    申请号：US09618637

    申请日：2000-07-18

    Applicant: James Digby Yarlet Collier ,  Ian Michael Sabberton

    Inventor： James Digby Yarlet Collier ,  Ian Michael Sabberton

    IPC: H04B110

    CPC classification number: H03J3/08 ,  H03B5/1265 ,  H03B2201/0266 ,  H03J2200/10

    Abstract: A radio transmitter and/or receiver comprising: an oscillator tuning circuit comprising an adjustable capacitor whose capacitance is adjustable by means of a first tuning signal; a filter tuning circuit comprising an adjustable capacitor whose capacitance is adjustable by means of a second tuning signal; an oscillator whose operational frequency is dependant on the reactance of the oscillator tuning circuit; a filter for filtering signals in the course of transmission and/or reception, and whose response is dependant on the reactance of the filter tuning circuit; and a tuning unit for generating the first and second tuning signals; wherein at least a part of the filter tuning circuit is a replica of at least a part of the oscillator tuning circuit and the tuning circuit is capable of generating one of the first and second tuning signals in dependence on the other of the tuning signals.

    Abstract translation: 一种无线电发射机和/或接收机，包括：振荡器调谐电路，包括可调电容器，其电容可通过第一调谐信号调节; 滤波器调谐电路，其包括可调电容器，其电容通过第二调谐信号可调; 振荡器的工作频率取决于振荡器调谐电路的电抗; 用于在发送和/或接收过程中对信号进行滤波，并且其响应取决于滤波器调谐电路的电抗的滤波器; 以及调谐单元，用于产生第一和第二调谐信号; 其中所述滤波器调谐电路的至少一部分是所述振荡器调谐电路的至少一部分的复制品，并且所述调谐电路能够根据所述调谐信号中的另一个产生所述第一和第二调谐信号中的一个。

    Oscillator circuit
    100.
    发明授权
    Oscillator circuit 有权

    公开(公告)号：US06661301B2

    公开(公告)日：2003-12-09

    申请号：US10013288

    申请日：2001-12-10

    Applicant: Johann Traub

    Inventor： Johann Traub

    IPC: H03B508

    CPC classification number: H03J5/244 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03B2201/0208 ,  H03B2201/0266

    Abstract: An oscillator circuit with connectable capacitance makes it possible for the oscillator to change over between at least two frequencies. A switching unit is provided for the changeover. The switching unit has a first switch which is connected between the switchable capacitances, and also further switches, which are connected with respect to a supply voltage terminal. Compared with conventional oscillators that can be changed over, the novel circuit provides for the advantage that a particularly low forward resistance takes effect in the switched-on state of the connectable capacitances and particularly small parasitic capacitances nevertheless take effect in the switched-off state. The oscillator circuit can be implemented with a particularly small chip area since the switches can be integrated in a common transistor structure with a common control terminal. The oscillator circuit is particularly suitable for mobile radio applications.

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