公开(公告)号：US07209017B2

公开(公告)日：2007-04-24

申请号：US11048456

申请日：2005-01-31

Applicant: Bour-Yi Sze ,  Chih-Long Ho ,  Ming-Chieh Huang

Inventor： Bour-Yi Sze ,  Chih-Long Ho ,  Ming-Chieh Huang

IPC: H03B5/12

CPC classification number: H03L7/10 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03B2201/0266 ,  H03C3/0958 ,  H03J5/244 ,  H03L7/099 ,  H03L2207/06

Abstract: A system is provided to improve frequency stability and system linearity in voltage controlled oscillators. A symmetrical voltage controlled oscillator system embodying the present invention comprises a frequency tuning circuit for receiving a frequency tuning signal, a band tuning circuit coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit for receiving at least one band tuning signal and at least one switching signal, a core circuit coupled with the frequency tuning circuit and the band tuning circuit for providing a first output and a second output that are complementary to each other, wherein upon asserting the switching signal, and upon adjusting the frequency tuning signal and the band tuning signal, the switching circuit is enabled for configuring the band tuning circuit to join the frequency tuning circuit for determining a predetermined output frequency based on a total inductance and total capacitance provided by the core circuit, the frequency tuning circuit and the band tuning circuit.

Abstract translation: 提供一种提高压控振荡器的频率稳定性和系统线性度的系统。 体现本发明的对称压控振荡器系统包括用于接收频率调谐信号的频率调谐电路，与频率调谐电路耦合的频带调谐电路，其具有至少一个开关电路，用于接收至少一个频带调谐信号 以及至少一个开关信号，与频率调谐电路耦合的核心电路和用于提供彼此互补的第一输出和第二输出的频带调谐电路，其中在断言切换信号时，并且在调整频率调谐 信号和频带调谐信号，使开关电路能够配置频带调谐电路，以连接频率调谐电路，用于基于由核心电路，频率调谐电路和频率调谐电路提供的总电感和总电容来确定预定的输出频率 带调谐电路。

公开(公告)号：US07126403B2

公开(公告)日：2006-10-24

申请号：US10978972

申请日：2004-11-01

Applicant: John G. Kenney, Jr. ,  Viswabharath Reddy ,  Ward Steven Titus

Inventor： John G. Kenney, Jr. ,  Viswabharath Reddy ,  Ward Steven Titus

IPC: G06F1/04

CPC classification number: H03B5/1228 ,  H03B5/1209 ,  H03B5/1215 ,  H03B5/1225 ,  H03B5/124 ,  H03B5/1265 ,  H03B2201/0266

Abstract: A new clock driver is described for the use in the phase detector of a clock and data recovery circuit (CDR). By building a resonant LC tank, whose center frequency is similar to the clock frequency, a low power clock driver is realized. A method based upon minimizing power consumption is described for determining the value of the programmable capacitance. A programmable capacitance adjusts the center frequency of the tank so it matches the frequency of the clock and a finite state machine at startup determines the value of this programmable capacitance. A criterion for tuning the center frequency of the tank is to choose the capacitance which leads to the lowest power consumption. A low Q tank affords a reasonable compromise between power efficiency and performance in the CDR circuit.

Abstract translation: 描述了用于时钟和数据恢复电路（CDR）的相位检测器中的新的时钟驱动器。 通过建立一个谐振LC箱，其中心频率与时钟频率相似，实现了低功率时钟驱动器。 描述了基于最小化功耗的方法来确定可编程电容的值。 可编程电容可调节电容器的中心频率，使其与时钟频率相匹配，启动时的有限状态机可确定该可编程电容的值。 调整储罐中心频率的标准是选择导致最低功耗的电容。 低Q槽在CDR电路中提供功率效率和性能之间的合理折中。

公开(公告)号：US07042297B2

公开(公告)日：2006-05-09

申请号：US10853676

申请日：2004-05-26

Applicant: Makoto Kawagishi ,  Hidemori Akagi ,  Tomoe Izumi ,  Masanari Tago

Inventor： Makoto Kawagishi ,  Hidemori Akagi ,  Tomoe Izumi ,  Masanari Tago

IPC: H03B5/12

CPC classification number: H03B5/1203 ,  H03B5/1231 ,  H03B2200/0048 ,  H03B2201/0266

Abstract: A frequency-selective high-frequency oscillator includes a first switching circuit that controls the operation of a first amplifying circuit, and a second switching circuit that controls the operation of the first switching circuit and a second amplifying circuit. Switching control signals are input to the second switching circuit. When the switching control signal is “Low”, the second switching circuit turns ON and the second amplifying circuit only operates, thereby outputting a high frequency signal with a resonant frequency according to a second resonant circuit. On the other hand, when the switching control signal is “High”, the second switching circuit turns OFF and the first switching circuit turns ON, which causes the first amplifying circuit only to operate. Thus, a high frequency signal with a resonant frequency acceding to a first resonant circuit is output.

Abstract translation: 频率选择性高频振荡器包括控制第一放大电路的操作的第一开关电路和控制第一开关电路的操作的第二开关电路和第二放大电路。 开关控制信号被输入到第二开关电路。 当开关控制信号为“低”时，第二开关电路导通，第二放大电路仅工作，从而根据第二谐振电路输出具有谐振频率的高频信号。 另一方面，当开关控制信号为“高”时，第二开关电路断开，第一开关电路导通，这使第一放大电路仅工作。 因此，输出具有与第一谐振电路相连的谐振频率的高频信号。

公开(公告)号：US20060028281A1

公开(公告)日：2006-02-09

申请号：US11047835

申请日：2005-01-31

Applicant: Bour-Yi Sze ,  Chih-Long Ho ,  Nean-Chu Cheng

Inventor： Bour-Yi Sze ,  Chih-Long Ho ,  Nean-Chu Cheng

IPC: H03L7/00

CPC classification number: H03L7/10 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03B2201/0266 ,  H03C3/0958 ,  H03J5/244 ,  H03L7/099 ,  H03L2207/06

Abstract: A VCO system embodying the features of the present invention includes a frequency tuning circuit, a modulation circuit coupled in a parallel fashion with the frequency tuning circuit, a band tuning circuit coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit, a core circuit coupled with the frequency tuning circuit, the modulation circuit, and the band tuning circuit, wherein upon asserting a switching signal and upon adjusting a frequency turning signal, a frequency tuning bias signal, and a band tuning signal, the switching circuit is enabled for configuring the band tuning circuit to join the frequency tuning circuit for adjusting a predetermined output frequency based on a total inductance and a total capacitance provided by the core circuit, the frequency tuning circuit, the modulation circuit and the band tuning circuit.

Abstract translation: 体现本发明特征的VCO系统包括频率调谐电路，与频率调谐电路并联耦合的调制电路，频带调谐电路，其与频率调谐电路并联连接，具有至少一个开关电路 与频率调谐电路，调制电路和频带调谐电路耦合的核心电路，其中在断言切换信号时，在调整频率转向信号，频率调谐偏置信号和频带调谐信号时，开关电路 用于配置频带调谐电路以基于由核心电路，频率调谐电路，调制电路和频带调谐电路提供的总电感和总电容来调整预定输出频率的频率调谐电路。

公开(公告)号：US06968168B1

公开(公告)日：2005-11-22

申请号：US09618296

申请日：2000-07-18

Applicant: James Digby Yarlet Collier ,  Ian Michael Sabberton

Inventor： James Digby Yarlet Collier ,  Ian Michael Sabberton

IPC: H03B5/08 ,  H03B1/00 ,  H03B5/12 ,  H03L7/099 ,  H03L7/18 ,  H04B7/00

CPC classification number: H03L7/099 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243 ,  H03B2201/0266 ,  H03J2200/10

Abstract: A variable frequency oscillator comprising: an oscillatory circuit for generating a periodic output dependent on the capacitance between a first node and a second node of the circuit, and having a capacitative element connected between the first node and the second node; the capacitative element comprising: a variable capacitance unit, the capacitance of which is variable for varying the frequency of the output and a plurality of finite capacitances each being selectively connectable in parallel with the variable capacitance unit between the first node and the second node to trim the frequency of the output.

Abstract translation: 一种可变频率振荡器，包括：振荡电路，用于根据电路的第一节点和第二节点之间的电容产生周期性输出，并且具有连接在第一节点和第二节点之间的电容元件; 所述电容元件包括：可变电容单元，其电容可变以改变输出的频率;以及多个有限电容，每个有选择的电容可选地可与第一节点和第二节点之间的可变电容单元并联，以修整 输出频率。

公开(公告)号：US20050212604A1

公开(公告)日：2005-09-29

申请号：US11055585

申请日：2005-02-10

Applicant: Russell Cyr ,  Geoffrey Dawe

Inventor： Russell Cyr ,  Geoffrey Dawe

IPC: H02M3/24 ,  H03B1/00 ,  H03B5/12 ,  H03C3/22 ,  H03D3/00 ,  H03F1/06 ,  H03F1/08 ,  H03F1/22 ,  H03F1/26 ,  H03F1/32 ,  H03F3/19 ,  H03F3/191 ,  H03F3/195 ,  H03F3/45 ,  H03F3/60 ,  H03G1/00 ,  H03G3/30 ,  H03L7/00 ,  H03L7/099 ,  H03L7/10 ,  H03L7/185 ,  H04B1/00 ,  H04B1/40 ,  H04L12/28 ,  H04L12/56

CPC classification number: H03F1/26 ,  H01L23/66 ,  H01L24/48 ,  H01L24/49 ,  H01L2223/6611 ,  H01L2224/05554 ,  H01L2224/05599 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2224/484 ,  H01L2224/49171 ,  H01L2224/49175 ,  H01L2224/85399 ,  H01L2924/00014 ,  H01L2924/01005 ,  H01L2924/01006 ,  H01L2924/01013 ,  H01L2924/01014 ,  H01L2924/01015 ,  H01L2924/01019 ,  H01L2924/01023 ,  H01L2924/01027 ,  H01L2924/01032 ,  H01L2924/01033 ,  H01L2924/01074 ,  H01L2924/01075 ,  H01L2924/01076 ,  H01L2924/01078 ,  H01L2924/01082 ,  H01L2924/01083 ,  H01L2924/014 ,  H01L2924/12034 ,  H01L2924/13091 ,  H01L2924/14 ,  H01L2924/1433 ,  H01L2924/1461 ,  H01L2924/15153 ,  H01L2924/15157 ,  H01L2924/15165 ,  H01L2924/19041 ,  H01L2924/19042 ,  H01L2924/19043 ,  H01L2924/30105 ,  H01L2924/30107 ,  H01L2924/3011 ,  H01L2924/30111 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03B5/1293 ,  H03B2201/0208 ,  H03B2201/0266 ,  H03C3/225 ,  H03D3/007 ,  H03F1/0205 ,  H03F1/08 ,  H03F1/223 ,  H03F1/3294 ,  H03F3/191 ,  H03F3/195 ,  H03F3/4521 ,  H03F3/60 ,  H03F2200/111 ,  H03F2200/225 ,  H03F2200/294 ,  H03F2200/331 ,  H03F2200/366 ,  H03F2200/372 ,  H03F2200/391 ,  H03F2200/429 ,  H03F2200/543 ,  H03F2200/78 ,  H03F2203/45256 ,  H03G3/3068 ,  H03J2200/10 ,  H03L7/099 ,  H03L7/10 ,  H03L7/185 ,  H04B1/006 ,  H04B1/40 ,  H04W24/00 ,  H04W80/00 ,  H04W88/02 ,  H01L2924/00011 ,  H01L2224/45099 ,  H01L2924/00

Abstract: A fully integrated, programmable mixed-signal radio transceiver comprising a radio frequency integrated circuit (RFIC) which is frequency and protocol agnostic with digital inputs and outputs, the radio transceiver being programmable and configurable for multiple radio frequency bands and standards and being capable of connecting to many networks and service providers. The RFIC includes a tunable resonant circuit that includes a transmission line having an inductance, a plurality of switchable capacitors configured to be switched into and out of the tunable resonant circuit in response to a first control signal, and at least one variable capacitor that can be varied in response to a second control signal, wherein a center resonant frequency of the resonant circuit is electronically tunable responsive to the first and second control signals that control a first capacitance value of the plurality of switchable capacitors and a second capacitance value of the at least one variable capacitor.

Abstract translation: 一种完全集成的可编程混合信号无线电收发器，包括射频集成电路（RFIC），其频率和协议与数字输入和输出无关，无线电收发器可编程并可配置用于多个无线电频带和标准，并且能够连接 到许多网络和服务提供商。 RFIC包括可调谐谐振电路，其包括具有电感的传输线，响应于第一控制信号被配置为切换到可调谐谐振电路中的多个可切换电容器，以及至少一个可变电容器，其可以是 响应于第二控制信号而变化，其中响应于控制多个可切换电容器的第一电容值的第一和第二控制信号，电谐振电路的中心谐振频率和至少该第二电容值的第二电容值 一个可变电容器。

公开(公告)号：US20050190022A1

公开(公告)日：2005-09-01

申请号：US11051221

申请日：2005-02-04

Applicant: Jorn Angel ,  Jurgen Oehm

Inventor： Jorn Angel ,  Jurgen Oehm

IPC: H03B1/00 ,  H03B5/12 ,  H03J3/20 ,  H03J5/24

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

Abstract: An arrangement and a method for connecting a capacitor into a circuit and disconnecting it therefrom are disclosed. The capacitor includes two capacitor elements, each with a main terminal and an auxiliary terminal. The auxiliary terminals are connected to one another at a reference node to which a control signal can be coupled as a function of the desired capacitance value. The capacitance value is tapped at the main terminals of the capacitor elements. When the capacitor is switched on, a high quality level is obtained, and when the capacitor is switched off, low parasitic capacitance components are obtained. For this reason the described arrangement is particularly suitable for use in voltage-controlled oscillators.

Abstract translation: 公开了一种用于将电容器连接到电路中并将其从其断开的装置和方法。 电容器包括两个电容器元件，每个电容器元件具有主端子和辅助端子。 辅助端子在可以根据期望的电容值耦合到控制信号的参考节点处彼此连接。 在电容器元件的主端子处抽出电容值。 当电容器接通时，获得高质量水平，当电容器关断时，获得低的寄生电容分量。 为此，所描述的布置特别适用于压控振荡器。

公开(公告)号：US20050017814A1

公开(公告)日：2005-01-27

申请号：US10853676

申请日：2004-05-26

Applicant: Makoto Kawagishi ,  Hidemori Akagi ,  Tomoe Izumi ,  Masanari Tago

Inventor： Makoto Kawagishi ,  Hidemori Akagi ,  Tomoe Izumi ,  Masanari Tago

IPC: H03B5/02 ,  H03B5/12 ,  H03B5/00

CPC classification number: H03B5/1203 ,  H03B5/1231 ,  H03B2200/0048 ,  H03B2201/0266

Abstract: A frequency-selective high-frequency oscillator includes a first switching circuit that controls the operation of a first amplifying circuit, and a second switching circuit that controls the operation of the first switching circuit and a second amplifying circuit. Switching control signals are input to the second switching circuit. When the switching control signal is “Low”, the second switching circuit turns ON and the second amplifying circuit only operates, thereby outputting a high frequency signal with a resonant frequency according to a second resonant circuit. On the other hand, when the switching control signal is “High”, the second switching circuit turns OFF and the first switching circuit turns ON, which causes the first amplifying circuit only to operate. Thus, a high frequency signal with a resonant frequency acceding to a first resonant circuit is output.

Abstract translation: 频率选择性高频振荡器包括控制第一放大电路的操作的第一开关电路和控制第一开关电路的操作的第二开关电路和第二放大电路。 开关控制信号被输入到第二开关电路。 当开关控制信号为“低”时，第二开关电路导通，第二放大电路仅工作，从而根据第二谐振电路输出具有谐振频率的高频信号。 另一方面，当开关控制信号为“高”时，第二开关电路断开，第一开关电路导通，这使第一放大电路仅工作。 因此，输出具有与第一谐振电路相连的谐振频率的高频信号。

公开(公告)号：US06778022B1

公开(公告)日：2004-08-17

申请号：US10057707

申请日：2002-01-24

Applicant: Pengfei Zhang ,  Chet Soorapanth

Inventor： Pengfei Zhang ,  Chet Soorapanth

IPC: H03L700

CPC classification number: H03L7/18 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/124 ,  H03B2201/0266 ,  H03J2200/10 ,  H03L7/099

Abstract: Circuits and methods for tuning voltage-controlled oscillators. A control voltage is applied through an isolation resistor to a varactor. The varactor capacitance is AC coupled through a second capacitance. The control voltage may be analog or digital. In a specific embodiment, multiple tuning diodes, and both analog and digital control voltages are used. The isolation resistor is outside the VCO tank circuit for low phase noise, excessive Kvco is reduced, and the control and output voltages of the oscillator may swing over the entire supply range. The varactor capacitance may be junction, MOS, or other type of varactor.

Abstract translation: 用于调谐压控振荡器的电路和方法。 控制电压通过隔离电阻施加到变容二极管。 变容二极管电容通过第二电容进行交流耦合。 控制电压可以是模拟或数字。 在具体实施例中，使用多个调谐二极管以及模拟和数字控制电压两者。 隔离电阻在VCO振荡电路之外，用于低相位噪声，过低的Kvco会降低，并且振荡器的控制和输出电压可能在整个电源范围内摆动。 变容二极管电容可以是结，MOS或其他类型的变容二极管。

公开(公告)号：US06621365B1

公开(公告)日：2003-09-16

申请号：US10115672

申请日：2002-04-03

Applicant: Juha Hallivuori ,  Pauli Seppinen

Inventor： Juha Hallivuori ,  Pauli Seppinen

IPC: H03B508

CPC classification number: H03J5/244 ,  H03B5/1212 ,  H03B5/1228 ,  H03B5/1243 ,  H03B2201/0208 ,  H03B2201/0266

Abstract: An RF VCO (260A) forms, in the preferred embodiment, a part of a dual mode mobile station (100). Also disclosed is a method for operating the VCO. The VCO is operated in a first frequency band using a first inductance (300A) that forms part of a first resonant circuit (parallel resonance), and the VCO is switched for operation to a second frequency band by the closing a switch (M5) that causes a second resonant circuit (serial resonance) to be inductively coupled to the first resonant circuit. The second resonant circuit includes a second inductance (300B), and preferably includes at least one frequency tunable component, such as a varactor (VR3, VR4), for adjusting the resonant frequency of the second resonant circuit. The second inductance is center tapped, and the switch, such as a MOS transistor, is coupled in series between two ends of the center tapped inductance. The first frequency band may include 3.6 GHz (a double frequency GSM band) and the second frequency band may include 4.3 GHz (a double frequency WCDMA band). Additional operational bands can be also be used. In the preferred embodiment the first inductance forms part of a transformer primary fabricated in an integrated circuit, and the second inductance forms part of the transformer secondary that is fabricated in the integrated circuit so as to underlie the first inductance. A signal detector (D1, D2) may be provided that is responsive to a signal induced in the transformer secondary, and the signal detector has an output coupled to a closed loop control circuit (310) for controlling a magnitude of a signal output from the VCO. A further input to the closed loop control circuit may be a signal that is indicative of communication channel conditions, and the current consumption of the VCO circuit is maintained at a level that is adequate to ensure operation with the communication channel conditions. A passive buffering circuit (320) is provided for coupling an output of the VCO circuit to a further circuit, such as a mixer, thereby reducing the total VCO current considerably.