公开(公告)号：US20050104677A1

公开(公告)日：2005-05-19

申请号：US11019451

申请日：2004-12-23

Applicant: Ramon Gomez

Inventor： Ramon Gomez

IPC: H03B1/00 ,  H03B5/12 ,  H03D7/18 ,  H03J5/24 ,  H03L7/00 ,  H03L7/089 ,  H03L7/099 ,  H03L7/10 ,  H03L7/18 ,  H03B5/00

CPC classification number: H03L7/00 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1253 ,  H03B5/1265 ,  H03B5/1278 ,  H03B2200/0046 ,  H03B2200/0048 ,  H03B2200/005 ,  H03B2201/02 ,  H03B2201/0208 ,  H03B2201/025 ,  H03D7/165 ,  H03D7/18 ,  H03J5/244 ,  H03J2200/10 ,  H03L7/0898 ,  H03L7/093 ,  H03L7/099 ,  H03L7/10 ,  H03L7/107 ,  H03L7/1072 ,  H03L7/18

Abstract: A gain compensator compensates for the gain variation of a varactor-tuned voltage tuned oscillator (VCO) in a phase lock loop (PLL). The VCO includes a parallel LC circuit having multiple fixed capacitors that can be switched-in or switched-out of the LC circuit according to a capacitor control signal to perform band-select tuning of the VCO. The gain compensator compensates for the variable VCO gain by generating a charge pump reference current that is based on the same capacitor control signal that controls the fixed capacitors in the LC circuit. The gain compensator generates the charge pump reference current by replicating a reference scale current using unit current sources. The number of times the reference scale current is replicated is based on the fixed capacitance that is switched-in to the LC circuit and therefore the frequency band of the PLL. The reference scale current is generated based on a PLL control that specifics certain PLL characteristics such as reference frequency, loop bandwidth, and loop damping. Therefore, the reference pump current can be efficiently optimized for changing PLL operating conditions, in addition to compensating for variable VCO gain.

公开(公告)号：US20050046494A1

公开(公告)日：2005-03-03

申请号：US10925669

申请日：2004-08-25

Applicant: Sang Lee ,  Hye Kim

Inventor： Sang Lee ,  Hye Kim

IPC: H03B5/00 ,  H03B1/00 ,  H03B5/12 ,  H03K3/354

CPC classification number: H03K3/354 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B2201/0208

Abstract: Disclosed is a quadrature VCO (voltage controlled oscillator) which comprises a first delay cell including a first switching transistor and a second switching transistor, the first delay cell outputting first and second in-phase signals with different phases; and a second delay cell including a third switching transistor and a fourth switching transistor, the second delay cell outputting first and second quadrature-phase signals with different phases. The first and second quadrature-phase signals are applied to back gates of the first and second switching transistors, and the first and second in-phase signals are applied to back gates of the fourth and third switching transistors.

Abstract translation: 公开了一种正交VCO（压控振荡器），其包括具有第一开关晶体管和第二开关晶体管的第一延迟单元，所述第一延迟单元以不同相位输出第一和第二同相信号; 以及包括第三开关晶体管和第四开关晶体管的第二延迟单元，所述第二延迟单元输出具有不同相位的第一和第二正交相位信号。 第一和第二正交相位信号被施加到第一和第二开关晶体管的后栅极，第一和第二同相信号被施加到第四和第三开关晶体管的后栅极。

公开(公告)号：US20040196111A1

公开(公告)日：2004-10-07

申请号：US10461436

申请日：2003-06-16

Inventor： Seung Min Oh ,  Hyo Seok Kwon

IPC: H03B001/00

CPC classification number: H03B5/1228 ,  H03B5/1212 ,  H03B5/1225 ,  H03B5/1243 ,  H03B5/1265 ,  H03B5/1293 ,  H03B2201/0208

Abstract: The present invention relates to a variable oscillation frequency resonance circuit and voltage controlled oscillator using the same, which includes an inductance element, frequency varying means, and oscillation band varying means. The oscillation band varying means is provided with one or more capacitance element pairs and one or more differential switching element pairs each being arranged between capacitance elements of each of the capacitance element pairs, with differential switching elements of each of the differential switching element pairs being arranged in parallel with each other, to allow a corresponding capacitance element pair to be connected to the inductance element in response to second control signals.

Abstract translation: 本发明涉及一种可变振荡频率谐振电路和使用该可变振荡频率谐振电路的压控振荡器，其包括电感元件，频率变化装置和振荡频带变化装置。 振荡频带改变装置设置有一个或多个电容元件对和一个或多个差分开关元件对，每个差分开关元件对被布置在每个电容元件对的电容元件之间，差动开关元件对中的每一个的差分开关元件被布置 彼此并联以允许相应的电容元件对响应于第二控制信号而连接到电感元件。

公开(公告)号：US20040189411A1

公开(公告)日：2004-09-30

申请号：US10741495

申请日：2003-12-19

Inventor： Holger Schroeter ,  Ingo Skuras

IPC: H03L007/00

CPC classification number: H01G4/33 ,  H03B5/1841 ,  H03B2201/0208

Abstract: An oscillator circuit for generating signals with a predetermined oscillator frequency is provided. The oscillator circuit has at least one resonator and at least one load impedance connected to the resonator. The oscillator circuit may be fully automatically trimmed and economically produced and, moreover, is of an improved quality wherein the load impedance comprises at least one structure which may be machined by means of high-energy radiation to trim the resonant characteristics of the oscillator circuit.

Abstract translation: 提供了用于产生具有预定振荡器频率的信号的振荡器电路。 振荡器电路具有至少一个谐振器和至少一个连接到谐振器的负载阻抗。 振荡器电路可以被完全自动修整和经济地制造，此外，具有改进的质量，其中负载阻抗包括至少一个结构，其可以通过高能辐射加工以修整振荡器电路的谐振特性。

公开(公告)号：US06714086B1

公开(公告)日：2004-03-30

申请号：US09758709

申请日：2001-01-11

Applicant: James Edward Landrith ,  William J. Tanis

Inventor： James Edward Landrith ,  William J. Tanis

IPC: H03B512

CPC classification number: H03B5/1231 ,  H03B5/1218 ,  H03B5/1243 ,  H03B2201/0208

Abstract: A symmetrical oscillator includes a reactive element, such as an inductor, coupled between first and second active components, where the reactive element defines a fundamental resonant frequency with one or more capacitances of the oscillator. A first feedback circuit is coupled between the first active component and a common node, while a second feedback circuit is coupled between the second active component and the common node such that an output signal at substantially twice the fundamental resonant frequency is obtained at the common node.

Abstract translation: 对称振荡器包括耦合在第一和第二有源部件之间的电抗器元件，例如电感器，其中无功元件限定与振荡器的一个或多个电容的基本谐振频率。 第一反馈电路耦合在第一有源部件和公共节点之间，而第二反馈电路耦合在第二有源部件和公共节点之间，使得在公共节点处获得基本共振频率基本上两倍的输出信号 。

公开(公告)号：US20040032302A1

公开(公告)日：2004-02-19

申请号：US10219084

申请日：2002-08-14

Applicant: International Business Machines Corporation

Inventor： Paul P. Chominski

IPC: H03B001/00

CPC classification number: H03B5/1231 ,  H03B5/1209 ,  H03B5/1243 ,  H03B5/1296 ,  H03B2201/0208

Abstract: A voltage controlled oscillator, comprising a pair of transistors connected to a tank circuit, said tank circuit including a plurality of tuning diodes connected in parallel with an inductor, said tuning diodes having cathodes connected to a common connection.

Abstract translation: 一种压控振荡器，包括连接到储能电路的一对晶体管，所述振荡电路包括与电感器并联连接的多个调谐二极管，所述调谐二极管具有连接到公共连接的阴极。

公开(公告)号：US20030231070A1

公开(公告)日：2003-12-18

申请号：US10454422

申请日：2003-06-03

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Fumitoshi Sato

IPC: H03B005/12

CPC classification number: H03B5/1228 ,  H03B5/1215 ,  H03B5/1243 ,  H03B2201/0208

Abstract: A balanced oscillator includes a differential oscillator circuit having two output terminals, and a differential amplifier circuit having two input terminals each being connected with a respective one of the two output terminals of the differential oscillator circuit. The direct-current path of the differential oscillator circuit is connected in series with the direct-current path of the differential amplifier circuit.

Abstract translation: 平衡振荡器包括具有两个输出端子的差分振荡器电路和具有两个输入端子的差分放大器电路，每个输入端子与差分振荡器电路的两个输出端子中的相应一个连接。 差分振荡电路的直流路径与差分放大电路的直流路径串联连接。

公开(公告)号：US06639479B2

公开(公告)日：2003-10-28

申请号：US10052856

申请日：2002-01-18

Applicant: Mike Kappes ,  Terje Gloerstad

Inventor： Mike Kappes ,  Terje Gloerstad

IPC: H03B520

CPC classification number: H03L7/00 ,  H03B2201/0208 ,  H03B2201/025 ,  H03K3/0231

Abstract: An integrated oscillator that may be used as a time clock includes circuitry that oscillates about an RC time constant, which RC time constant is adjustable to provide a desired frequency of oscillation. More specifically, the oscillator includes a capacitor array that has a plurality of capacitors coupled in parallel wherein each capacitor may be selectively included into the RC time constant or selectively excluded there from. Rather than setting the capacitance values to a desired capacitance value, a system for adjusting the time constant includes circuitry for measuring an output frequency and for comparing that to a certified frequency source wherein the time constant is adjusted by adding or removing capacitors from the capacitor array until the frequency of the internal clock matches an expected frequency.

Abstract translation: 可用作时钟的集成振荡器包括围绕RC时间常数振荡的电路，RC时间常数可调，以提供期望的振荡频率。 更具体地说，振荡器包括电容器阵列，其具有并联耦合的多个电容器，其中每个电容器可被选择性地包括在RC时间常数中或者选择性地被包括在其中。 不是将电容值设置为期望的电容值，而是用于调整时间常数的系统包括用于测量输出频率并将其与经认证的频率源进行比较的电路，其中通过从电容器阵列中添加或去除电容器来调整时间常数 直到内部时钟的频率与预期频率相匹配。

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.

公开(公告)号：US06603367B2

公开(公告)日：2003-08-05

申请号：US09908960

申请日：2001-07-19

Applicant: Douglas Pao ,  Louise C. Sengupta

Inventor： Douglas Pao ,  Louise C. Sengupta

IPC: H03B100

CPC classification number: H03B5/187 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1293 ,  H03B2201/0208

Abstract: A voltage controlled oscillator includes an active element having a first connection point for connection to a voltage source and an output connection point. A tunable resonator including a first voltage tunable dielectric device is connected to an input of the active element. A first circuit branch is also connected to the active element. The first circuit branch can include a second voltage tunable dielectric device. A tuning voltage controller supplies a control voltage to the first and second voltage tunable dielectric devices to control the frequency of an oscillating voltage at the output connection point. In a reflect type voltage controlled oscillator, the first circuit branch is a bypass circuit. In a transmission type voltage controlled oscillator, the first circuit branch includes a phase shifter and is connected between the active element output connection point and the tunable resonator.