公开(公告)号：US20010045870A1

公开(公告)日：2001-11-29

申请号：US09338383

申请日：1999-06-23

Inventor： KIYOFUMI TAKAI ,  KOJI RYUGO

IPC: H03B005/08 ,  H03B005/18 ,  H03J007/08

CPC classification number: H03B1/04 ,  H03B2201/0208 ,  H03B2202/05 ,  H03B2202/07 ,  H03B2202/08

Abstract: It is an object of the present invention to provide the voltage controlled oscillation circuit preventing the influence of a capacitor in the output side of the loop filter connected to a control voltage terminal. A voltage controlled oscillation circuit comprising of an amplifier circuit, a resonance circuit, a varactor diode, a choke element whose one end is connected to the cathode of a varactor diode, a capacitor connected between the other end of the choke element and a ground, and a resistor connected between the other end of the choke element and a control voltage terminal. A sub-resonance of the resonance system of the voltage controlled oscillation circuit due to the capacitor in the output side of the loop filter connected to the control voltage terminal can be eliminated, the abnormal oscillation of the voltage controlled oscillation circuit can be prevented, and the relationship between the oscillation frequency and the control voltage exhibits almost linear.

Abstract translation: 本发明的目的是提供一种电压控制振荡电路，其防止连接到控制电压端子的环路滤波器的输出侧的电容器的影响。 一种压控振荡电路，包括放大电路，谐振电路，变容二极管，一端连接到变容二极管的阴极的扼流元件，连接在扼流圈元件的另一端与地之间的电容器， 以及连接在扼流圈元件的另一端和控制电压端子之间的电阻器。 可以消除由于连接到控制电压端子的环路滤波器的输出侧的电容器引起的压控振荡电路的谐振系统的副共振，可以防止压控振荡电路的异常振荡， 振荡频率与控制电压之间的关系几乎呈线性关系。

公开(公告)号：US20010028277A1

公开(公告)日：2001-10-11

申请号：US09827852

申请日：2001-04-06

Inventor： Alan R. Northam

IPC: H03B005/36 ,  H03L007/099

CPC classification number: H03B5/326 ,  H03B2201/0208

Abstract: There is disclosed a SAW resonator-based oscillator circuit having low phase noise that is tunable across a comparatively wide frequency range. The oscillator circuit comprises: 1) a tuning element coupled to the input port and having a variable capacitance responsive to the frequency tuning signal; 2) a first inductor coupled in series with the tuning element; 3) a SAW resonator coupled in series with first inductor; 4) a second inductor coupled in parallel with the SAW resonator; 5) a negative resistance generating circuit coupled to the SAW resonator. Across the tunable operating frequency range of the oscillator circuit, the reactance looking into the input port is maintained at approximately zero and the resistance looking into the input port remains negative.

Abstract translation: 公开了一种具有低相位噪声的基于SAW谐振器的振荡器电路，其可在相对较宽的频率范围内调节。 所述振荡器电路包括：1）耦合到所述输入端口并具有响应于所述频率调谐信号的可变电容的调谐元件; 2）与调谐元件串联耦合的第一电感器; 3）与第一电感器串联耦合的SAW谐振器; 4）与所述SAW谐振器并联耦合的第二电感器; 5）耦合到SAW谐振器的负电阻产生电路。 在振荡器电路的可调工作频率范围内，看入输入端口的电抗保持在大约零，并且进入输入端口的电阻保持为负。

公开(公告)号：US20010019294A1

公开(公告)日：2001-09-06

申请号：US09789542

申请日：2001-02-22

Inventor： Nobuyuki Itoh

IPC: H03B005/12

CPC classification number: H03B5/1228 ,  H03B5/1212 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1293 ,  H03B2200/0038 ,  H03B2201/0208

Abstract: A voltage controlled oscillator includes an amplifier having a positive feedback construction, configured to output an oscillation signal of a frequency corresponding to a control voltage supplied to a variable capacitor of a tank circuit having an inductor and the variable capacitor, and a variable current source configured to change an operation current supplied to the amplifier according to the control voltage. When a certain oscillation frequency at which phase noise becomes minimum is set as a reference point, the variable current source increases the operation current supplied to the amplifier as the oscillation frequency becomes lower than the certain oscillation frequency, or decreases the operation current supplied to the amplifier as the oscillation frequency becomes higher than the certain oscillation frequency. With this construction, a voltage controlled oscillator having a stable and sufficiently suppressed phase noise characteristic can be realized irrespective of the oscillation frequency.

Abstract translation: 压控振荡器包括具有正反馈结构的放大器，其被配置为输出与提供给具有电感器的可变电容器的可变电容器和可变电容器的控制电压相对应的频率的振荡信号，以及可变电流源配置 以根据控制电压改变提供给放大器的工作电流。 当将相位噪声变得最小的一定的振荡频率设定为参考点时，随着振荡频率变得低于特定的振荡频率，可变电流源增加提供给放大器的工作电流，或者减小提供给 放大器作为振荡频率变得高于一定的振荡频率。 利用这种结构，可以实现具有稳定且充分抑制的相位噪声特性的压控振荡器，而与振荡频率无关。

公开(公告)号：US06252470B1

公开(公告)日：2001-06-26

申请号：US09451318

申请日：1999-11-30

Applicant: Kazuaki Togawa

Inventor： Kazuaki Togawa

IPC: H03B518

CPC classification number: H03B5/1847 ,  H03B2201/011 ,  H03B2201/0208 ,  H03B2201/0225

Abstract: An oscillating circuit adjusts its oscillating frequency through the following method. A tip-open type strip-line stub coupled to the base terminal of the transistor. An electrical length of the stub is changed by an adjusting mechanism such as coupling the stub with conductive small lands provided near the stub tip by a chip resistor. A “kotatsu” employs a remote controller including this oscillating circuit.

Abstract translation: 振荡电路通过以下方法调整振荡频率。 耦合到晶体管的基极的尖端开放型带状线短路。 短截线的电长度通过调节机构改变，例如通过芯片电阻器将短截线与短截线附近提供的导电小平台连接。 “kotatsu”采用包括该振荡电路的遥控器。

公开(公告)号：US6064276A

公开(公告)日：2000-05-16

申请号：US98267

申请日：1998-06-16

Applicant: John G. Hallatt ,  Ian R. Aldred

Inventor： John G. Hallatt ,  Ian R. Aldred

IPC: G01S7/03 ,  H03B1/00 ,  H03B5/18

CPC classification number: G01S7/032 ,  G01S13/56 ,  H03B5/1876 ,  H03B2201/0208 ,  H03B5/1852

Abstract: An oscillator circuit comprising first and second mutually electromagnetically couplable resonant circuits, the second circuit comprising a dielectric element and excitation means operable to produce a first frequency of oscillation, the first circuit comprising the dielectric element, excitation means including a two-terminal Schottky device, preferably a Schottky diode, operable, responsive to an applied signal, to vary the resonant frequency of the first resonant circuit, and thereby vary the frequency of oscillation of the oscillator circuit.

Abstract translation: 一种振荡器电路，包括第一和第二相互电磁耦合的谐振电路，所述第二电路包括电介质元件和可操作以产生第一振荡频率的激励装置，所述第一电路包括所述电介质元件，激励装置包括二端肖特基器件， 优选肖特基二极管，可响应于所施加的信号而操作，以改变第一谐振电路的谐振频率，从而改变振荡器电路的振荡频率。

公开(公告)号：US6011440A

公开(公告)日：2000-01-04

申请号：US819966

申请日：1997-03-18

Applicant: David B. Bell ,  Dale R. Eager

Inventor： David B. Bell ,  Dale R. Eager

IPC: H03B1/00 ,  H03L7/089 ,  H03L7/093 ,  H03L7/10 ,  H03F3/04

CPC classification number: H03L7/10 ,  H03L7/093 ,  H03B2201/0208 ,  H03L7/0891

Abstract: Amplifier circuitry is provided having an output voltage range that exceeds its supply rail voltage. Such an amplifier may be useful in battery powered applications calling for driving a high impedance load with a low current, moderate bandwidth signal The amplifier circuitry includes a transconductance amplifier, for providing a high output impedance, and a charge pump DC/DC converter, for providing a high supply voltage to the transconductance amplifier. In one embodiment of the invention, the gain of the amplifier is a function of the input voltage so as to linearize a transfer function between the amplifier input and a response of a load at the amplifier's output.

Abstract translation: 提供具有超过其电源电压的输出电压范围的放大器电路。 这种放大器在电池供电的应用中可能是有用的，其要求用低电流，中等带宽信号驱动高阻抗负载。放大器电路包括用于提供高输出阻抗的跨导放大器和电荷泵DC / DC转换器，用于 向跨导放大器提供高电源电压。 在本发明的一个实施例中，放大器的增益是输入电压的函数，以便将放大器输入与放大器输出端的负载的响应之间的传递函数线性化。

公开(公告)号：US5926466A

公开(公告)日：1999-07-20

申请号：US648416

申请日：1996-05-15

Applicant: Kaoru Ishida ,  Hiroaki Kosugi ,  Fujio Sasaki ,  Yoichi Morinaga

Inventor： Kaoru Ishida ,  Hiroaki Kosugi ,  Fujio Sasaki ,  Yoichi Morinaga

IPC: H01P1/203 ,  H01P1/213 ,  H03B1/00 ,  H03H7/38 ,  H03H7/46 ,  H04B1/40 ,  H04B1/48 ,  H04B1/56 ,  H04J4/00 ,  H04L5/14

CPC classification number: H01P1/20345 ,  H01P1/2135 ,  H03H7/38 ,  H03H7/46 ,  H04B1/005 ,  H04B1/0057 ,  H04B1/006 ,  H04B1/406 ,  H04B1/48 ,  H03B2201/0208 ,  H03H2007/386

Abstract: A time division multiple access FDD wireless unit has a first local oscillator 8 for oscillating a first frequency; a second local oscillator 12 for oscillating a second frequency; a n-times multiplier 14 for multiplying the second frequency by n; a m-times multiplier 18 for multiplying the second frequency by m; a converter 6 for transmitting frequency of difference between a reception signal and an output of the first local oscillator 8; a converter 11 for transmitting frequency of sum or difference between an output of the converter 6 and an output of the n-times multiplier 14; modulator 19 for modulating an output of the m-times multiplier 18; a converter 22 for transmitting frequency of sum of an output of the modulator 19 and the output of m-times multiplier 18.

Abstract translation: 时分多址FDD无线单元具有用于振荡第一频率的第一本地振荡器8; 用于振荡第二频率的第二本地振荡器12; 用于将第二频率乘以n的n次乘法器14; 用于将第二频率乘以m的m倍乘法器18; 用于发送接收信号和第一本地振荡器8的输出之间的差的频率的转换器6; 用于发送转换器6的输出和n次乘法器14的输出之间的和或差的频率的转换器11; 用于调制m次乘法器18的输出的调制器19; 用于发送调制器19的输出和m次乘法器18的输出的和的频率的转换器22。

公开(公告)号：US5905414A

公开(公告)日：1999-05-18

申请号：US971693

申请日：1997-11-17

Applicant: Yasuo Motoi

Inventor： Yasuo Motoi

IPC: H03B1/00 ,  H03B5/12 ,  H03B5/18 ,  H03C3/22

CPC classification number: H03C3/222 ,  H03B5/1218 ,  H03B5/1231 ,  H03B5/1243 ,  H03B2200/0034 ,  H03B2200/004 ,  H03B2201/0208 ,  H03C2200/005

Abstract: A voltage controlled oscillator having a reduced oscillation frequency-modulation sensitivity variation and having a positive modulation function is designed to: (a) reduce the modulation variation by making the rate of change in oscillation frequency with a certain change in a modulation signal generally constant with respect to a wide range of oscillation frequencies; (b) reduce the manufacturing cost by using only one varactor diode; and (c) reduce the cost of a system using the voltage controlled oscillator by eliminating the need for correction of the modulation variation on the side of a system using the oscillator. In a variable capacitance circuit of the voltage controlled oscillator, the cathode of a varactor diode is connected to a control voltage terminal and is also connected to a modulation signal input terminal by a coupling resistor and a voltage dividing resistor.

Abstract translation: 具有降低的振荡频率调制灵敏度变化并具有正调制功能的压控振荡器被设计成：（a）通过使调制信号的一定变化使振荡频率的变化率通常恒定来降低调制变化， 相对于宽范围的振荡频率; （b）仅使用一个变容二极管降低制造成本; 和（c）通过消除对使用振荡器的系统侧的调制变化进行校正的需要来降低使用压控振荡器的系统的成本。 在压控振荡器的可变电容电路中，变容二极管的阴极连接到控制电压端子，并且还通过耦合电阻器和分压电阻器连接到调制信号输入端子。

公开(公告)号：US5898345A

公开(公告)日：1999-04-27

申请号：US892201

申请日：1997-07-14

Applicant: Yasuaki Namura ,  Hideyuki Fukuda

Inventor： Yasuaki Namura ,  Hideyuki Fukuda

IPC: H03B1/00 ,  H03B5/12 ,  H03B5/32 ,  H03B5/36 ,  H03L1/02 ,  H03L7/099 ,  H03L7/189 ,  G03B5/00

CPC classification number: H03L7/189 ,  H03B5/368 ,  H03L1/025 ,  H03L7/099 ,  H03B2201/0208 ,  H03B2201/0283 ,  H03L2207/06

Abstract: A controllable-frequency oscillator has a first portion for generating a signal having a controllable frequency. The controllable-frequency oscillator has a second portion for controlling the frequency of the signal generated by the first portion in response to a first control signal. The controllable-frequency oscillator has a third portion for controlling the frequency of the signal generated by the first portion in response to a second control signal separate from the first control signal.

Abstract translation: 可控频率振荡器具有用于产生具有可控频率的信号的第一部分。 可控频率振荡器具有第二部分，用于响应于第一控制信号来控制由第一部分产生的信号的频率。 可控频率振荡器具有第三部分，用于响应于与第一控制信号分离的第二控制信号来控制由第一部分产生的信号的频率。

公开(公告)号：US5874864A

公开(公告)日：1999-02-23

申请号：US964678

申请日：1997-11-05

Applicant: Masaki Muto ,  Yoshihisa Mochida ,  Ryuji Mizukoshi ,  Chikao Maeda

Inventor： Masaki Muto ,  Yoshihisa Mochida ,  Ryuji Mizukoshi ,  Chikao Maeda

IPC: H03B5/32 ,  H03B1/00 ,  H03L1/02 ,  H03B5/04 ,  H03B5/36

CPC classification number: H03L1/025 ,  H03B2201/0208 ,  H03B5/32

Abstract: A control circuit includes: a temperature 30; a temperature sensing section 32; a memory 36, an amplifying section 31 to which the memory and the temperature sensor are electrically connected; a first D/A converting section 38 electrically interposed between the memory and the temperature sensing section; a second D/A converting section electrically interposed between the memory and the amplifying section 31, The amplifying section 31 includes: a polarity inverting circuit 33 connected to the temperature sensor; and a variable attenuator 34, an offset adjusting circuit 100, and an amplifying circuit 35 that are connected sequentially to the polarity inverting circuit. The amplifying section 31 is connected to a sample hold circuit 41 through a displacement buffering means 101. The memory has 8 or less working control voltage setting groups.

Abstract translation: 控制电路包括：温度30; 温度检测部32; 存储器36，存储器和温度传感器电连接的放大部分31; 电插入存储器和温度检测部分之间的第一D / A转换部分38; 电插入存储器和放大部分31之间的第二D / A转换部分。放大部分31包括：连接到温度传感器的极性反转电路33; 以及顺序连接到极性反转电路的可变衰减器34，偏移调整电路100和放大电路35。 放大部分31通过位移缓冲装置101连接到采样保持电路41.存储器具有8个或更少的工作控制电压设定组。