公开(公告)号：US06836191B2

公开(公告)日：2004-12-28

申请号：US10435454

申请日：2003-05-12

申请人： Masanori Fujidai ,  Hiroshi Nishida ,  Takahiro Baba ,  Satoshi Shinoda ,  Koichi Sakamoto

发明人： Masanori Fujidai ,  Hiroshi Nishida ,  Takahiro Baba ,  Satoshi Shinoda ,  Koichi Sakamoto

IPC分类号： H03B512

CPC分类号： H03B5/1864 ,  H03B5/18 ,  H03B5/1847 ,  H03B5/368

摘要： A voltage controlled oscillator includes a resonant circuit which is connected with an active circuit. In the resonant circuit, a variable capacitance diode is connected with a resonator via a transmission line, and a capacitive circuit is connected in parallel with the variable capacitance diode. By setting the length of the transmission line to an appropriate value ranging from, for example, about one quarter to about one half of the wavelength of the resonant frequency, the frequency change width can increase, while maintaining the frequency linearity because of connection of the capacitive circuit.

摘要翻译： 压控振荡器包括与有源电路连接的谐振电路。 在谐振电路中，可变电容二极管通过传输线与谐振器连接，并且电容电路与可变电容二极管并联连接。 通过将传输线的长度设定为范围从谐振频率波长的约四分之一到约一半的适当值，频率变化宽度可以增加，同时保持频率线性由于 电容电路。

公开(公告)号：US20040233008A1

公开(公告)日：2004-11-25

申请号：US10801111

申请日：2004-03-15

发明人： Yoshihiro Kobayashi

IPC分类号： H03B005/20

CPC分类号： H03B5/368 ,  H03L7/0995

摘要： An oscillator circuit is a closed loop including an amplifying circuit and a feedback circuit. The amplifying circuit includes a pair of amplifiers, which also function as impedance buffers, and a first phase-shift circuit. The feedback circuit includes a second phase-shift circuit and a piezoelectric vibrator. The second phase-shift circuit is capable of adjusting the phase and gain of the feedback circuit. The first phase-shift circuit of the amplifying circuit is arranged between the pair of amplifiers and is separated, in terms of impedance, from the second phase-shift circuit. The first phase-shift circuit is capable of adjusting the phase of the entire closed loop.

摘要翻译： 振荡电路是包括放大电路和反馈电路的闭环。 放大电路包括一对放大器，其也用作阻抗缓冲器，以及第一相移电路。 反馈电路包括第二相移电路和压电振子。 第二相移电路能够调整反馈电路的相位和增益。 放大电路的第一相移电路布置在该对放大器之间，并且在阻抗方面与第二移相电路分离。 第一相移电路能够调节整个闭环的相位。

公开(公告)号：US06794707B1

公开(公告)日：2004-09-21

申请号：US10707041

申请日：2003-11-17

申请人： Min Cao

发明人： Min Cao

IPC分类号： H01L27108

CPC分类号： H01L29/94 ,  H01L27/0811 ,  H01L29/93 ,  H03B5/368

摘要： A voltage-variable capacitor uses the channel-to-substrate junction from a gated diode formed from a metal-oxide-semiconductor transistor. The transistor gate has at least two contacts that are biased to different voltages. The gate acts as a resistor with current flowing from an upper gate contact to a lower gate contact. The gate-to-source voltage varies as a function of the position. A critical voltage is where the gate-to-source voltage is equal to the transistor threshold. A portion of the gate that has gate voltages above the critical voltage has an inversion layer or conducting channel under the gate. Another portion of the gate has gate voltages below the critical voltage, and thus no channel forms. By varying either the gate voltages or the source voltage, the area of the gate that has a channel under it is varied, varying the channel-to-substrate capacitance. Separate gate arms reduce bias current.

摘要翻译： 电压可变电容器使用由金属氧化物半导体晶体管形成的门控二极管的沟道至衬底结。 晶体管栅极具有被偏置到不同电压的至少两个触点。 栅极用作具有从上栅极接触到下栅极接触的电流的电阻器。 栅极至源极电压根据位置的函数而变化。 临界电压是栅极至源极电压等于晶体管阈值的地方。 具有高于临界电压的栅极电压的栅极的一部分在栅极下方具有反转层或导通沟道。 门的另一部分具有低于临界电压的栅极电压，因此不形成通道。 通过改变栅极电压或源极电压，在其下方具有通道的栅极的面积是变化的，改变了沟道对衬底的电容。 单独的门臂减少偏置电流。

公开(公告)号：US06771135B2

公开(公告)日：2004-08-03

申请号：US10370177

申请日：2003-02-19

申请人： Kuichi Kubo ,  Fumio Asamura

发明人： Kuichi Kubo ,  Fumio Asamura

IPC分类号： H03B532

CPC分类号： H03B5/04 ,  H03B5/368

摘要： A temperature-compensated crystal oscillator (TCXO) comprises a voltage-controlled crystal oscillator (VCXO) having a crystal unit, a compensating voltage generator for generating a compensating voltage applied to the voltage-controlled crystal oscillator, a low pass filter inserted between the compensating voltage generator and voltage-controlled crystal oscillator, and a switching element connected in parallel with the low pass filter for short-circuiting across the low pass filter. In a manufacturing process of the temperature-compensated crystal oscillator, switching element is brought into a conducting state when an excitation electrode of the crystal unit is irradiated with an ion beam for adjusting the oscillation frequency.

摘要翻译： 温度补偿晶体振荡器（TCXO）包括具有晶体单元的压控晶体振荡器（VCXO），用于产生施加到压控晶体振荡器的补偿电压的补偿电压发生器，插入在补偿电压晶体振荡器 电压发生器和压控晶体振荡器，以及与低通滤波器并联连接的开关元件，用于跨低通滤波器短路。 在温度补偿晶体振荡器的制造过程中，当用用于调节振荡频率的离子束照射晶体单元的激励电极时，开关元件进入导通状态。

公开(公告)号：US20040085142A1

公开(公告)日：2004-05-06

申请号：US10695263

申请日：2003-10-27

申请人： Intel Corporation, a Delaware Corporation

发明人： Chinnugounder Senthilkumar ,  Robert Fulton ,  Tea Lee

IPC分类号： H03L007/00

CPC分类号： H03B5/368

摘要： Circuitry for controlling the oscillation frequency of an oscillator by using a digitally tunable on-chip capacitor bank. The capacitor bank includes a plurality of on-chip capacitors, each of which is independently selectable by a control signal for providing a selectable amount of capacitance to the oscillator to control the oscillator's oscillation frequency.

公开(公告)号：US06549083B2

公开(公告)日：2003-04-15

申请号：US09855686

申请日：2001-05-16

申请人： Nobuyuki Kanazawa ,  Takeo Oita ,  Yuichi Sato

发明人： Nobuyuki Kanazawa ,  Takeo Oita ,  Yuichi Sato

IPC分类号： H03B536

CPC分类号： H03B5/368 ,  H03B5/362

摘要： A high-frequency crystal oscillator capable of outputting a signal at a frequency, for example, higher than 500 MHz without using a multiplication amplifier. The high-frequency crystal oscillator comprises a voltage controlled Colpitts oscillation circuit operating at the fundamental frequency of a quartz-crystal element, means for increasing the level of harmonic component in an output from the Colpitts oscillation circuit, an SAW (Surface Acoustic Wave) filter for selecting a component of a predetermined order of the harmonic component, and a broadband amplifier for amplifying the component selected by the SAW filter. The means for increasing the levels of harmonic component is, for example, a resistor for setting the operating point of a transistor in the oscillation circuit such that an output signal is distorted.

摘要翻译： 能够输出频率例如高于500MHz的信号而不使用乘法放大器的高频晶体振荡器。 高频晶体振荡器包括以石英晶体元件的基频操作的电压控制的Colpitts振荡电路，用于增加来自Colpitts振荡电路的输出中的谐波分量的电平，SAW（表面声波）滤波器 用于选择谐波分量的预定次数的分量，以及用于放大由SAW滤波器选择的分量的宽带放大器。 用于增加谐波分量的装置是例如用于设置振荡电路中的晶体管的工作点的电阻器，使得输出信号失真。

公开(公告)号：US20020180544A1

公开(公告)日：2002-12-05

申请号：US10149419

申请日：2002-06-21

发明人： Hiroyuki Fukayama ,  Yasuhiro Sakurai

IPC分类号： H03L001/00

CPC分类号： H03B5/04 ,  H03B5/32 ,  H03B5/368 ,  H03L1/026 ,  H03L1/028

摘要： The temperature of an oscillation circuit (47) is detected by a temperature detection circuit (13), a cubic term voltage generation circuit of a control voltage generation circuit (23) generates a cubic term voltage as a control voltage based on an output voltage of the temperature detection circuit (13), and a frequency adjustment circuit (45) changes an oscillation frequency of the oscillation circuit (47) by the control voltage. The cubic term voltage generation circuit includes a first MOS transistor (37) having a source connected to a first power line (25), a second MOS transistor (35) having a source connected to a second power line (26), and digital control voltage division circuits (31, 33) for generating a first and a second gate voltage, respectively based on the output voltage of the temperature detection circuit (13), in which the first and second gate voltages are applied to gates of the first and second MOS transistors (37, 35) respectively, and a connection point (44) where respective drains are commonly connected shall be an output terminal of the control voltage.

摘要翻译： 振荡电路（47）的温度由温度检测电路（13）检测，控制电压产生电路（23）的立方项电压产生电路产生三次项电压作为基于输出电压 温度检测电路（13）和频率调整电路（45）通过控制电压来改变振荡电路（47）的振荡频率。 三次项电压产生电路包括具有连接到第一电源线（25）的源极的第一MOS晶体管（37），具有连接到第二电力线（26）的源极的第二MOS晶体管（35），以及数字控制 分压电路（31,33），分别基于温度检测电路（13）的输出电压产生第一和第二栅极电压，其中第一和第二栅极电压施加到第一和第二栅极的栅极 MOS晶体管（37,35）和各自的漏极共同连接的连接点（44）为控制电压的输出端子。

公开(公告)号：US20020017959A1

公开(公告)日：2002-02-14

申请号：US09855686

申请日：2001-05-16

申请人： NIHON DEMPA KOGYO CO., LTD

发明人： Nobuyuki Kanazawa ,  Takeo Oita ,  Yuichi Sato

IPC分类号： H03B005/36

CPC分类号： H03B5/368 ,  H03B5/362

摘要： A high-frequency crystal oscillator capable of outputting a signal at a frequency, for example, higher than 500 MHz without using a multiplication amplifier. The high-frequency crystal oscillator comprises a voltage controlled Colpitts oscillation circuit operating at the fundamental frequency of a quartz-crystal element, means for increasing the level of harmonic component in an output from the Colpitts oscillation circuit, an SAW (Surface Acoustic Wave) filter for selecting a component of a predetermined order of the harmonic component, and a broadband amplifier for amplifying the component selected by the SAW filter. The means for increasing the levels of harmonic component is, for example, a resistor for setting the operating point of a transistor in the oscillation circuit such that an output signal is distorted.

摘要翻译： 能够输出频率例如高于500MHz的信号而不使用乘法放大器的高频晶体振荡器。 高频晶体振荡器包括以石英晶体元件的基频操作的电压控制的Colpitts振荡电路，用于增加来自Colpitts振荡电路的输出中的谐波分量的电平，SAW（表面声波）滤波器 用于选择谐波分量的预定次数的分量，以及用于放大由SAW滤波器选择的分量的宽带放大器。 用于增加谐波分量的装置是例如用于设置振荡电路中的晶体管的工作点的电阻器，使得输出信号失真。

公开(公告)号：US5898345A

公开(公告)日：1999-04-27

申请号：US892201

申请日：1997-07-14

申请人： Yasuaki Namura ,  Hideyuki Fukuda

发明人： Yasuaki Namura ,  Hideyuki Fukuda

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

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

摘要： 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.

摘要翻译： 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：US5844448A

公开(公告)日：1998-12-01

申请号：US928162

申请日：1997-09-12

申请人： Keith Edward Jackoski ,  John Wayne Simmons ,  Gerald Paul Schwieterman

发明人： Keith Edward Jackoski ,  John Wayne Simmons ,  Gerald Paul Schwieterman

IPC分类号： H03B5/36 ,  H03K3/014 ,  H03K3/03 ,  H03L3/00 ,  H03B5/32

CPC分类号： H03L3/00 ,  H03K3/014 ,  H03K3/0307 ,  H03B2200/004 ,  H03B5/368

摘要： An oscillator circuit (10) having an optimized start up time includes an inverting amplifier (12) coupled in parallel to a crystal (14), a first bank of capacitors (16) coupled to the crystal, and a second bank of capacitors (20) switchably coupled (18) in parallel to the frequency resonant network, wherein the second bank of capacitors has a higher capacitance load than the first bank of capacitors. The oscillator circuit may also include a processor (62) for controlling when the second bank of capacitors gets switched and coupled to the crystal.

摘要翻译： 具有优化的启动时间的振荡器电路（10）包括与晶体（14）并联耦合的反相放大器（12），耦合到晶体的第一组电容器（16）和第二组电容器（20） ）与所述频率共振网络并联地切换耦合（18），其中所述第二组电容器具有比所述第一组电容器更高的电容负载。 振荡器电路还可以包括用于控制何时第二组电容器被切换并耦合到晶体的处理器（62）。