公开(公告)号：US6072371A

公开(公告)日：2000-06-06

申请号：US876275

申请日：1997-06-16

申请人： Kevin W. Kobayashi ,  Duncan M. Smith ,  Aaron K. Oki ,  Arvind K. Sharma ,  Barry R. Allen

发明人： Kevin W. Kobayashi ,  Duncan M. Smith ,  Aaron K. Oki ,  Arvind K. Sharma ,  Barry R. Allen

IPC分类号： H03L7/099 ,  H03B5/02 ,  H03B5/18 ,  H03B5/00 ,  H03B5/12

CPC分类号： H03B5/1847

摘要： A quenchable VCO that is adapted to be used in switched band synthesizer applications. The VCO may be formed from a heterojunction bipolar transistor (HBT) in a common collector configuration. A quenching circuit which includes a p-i-n diode, is electrically coupled in series with the collector of the HBT. The p-i-n diode is adapted to be monolithically integrated with the HBT. Since the p-i-n diode is electrically connected to the collector of the HBT, as opposed to the base and emitter terminals of the HBT, which forms the main oscillator feedback loop, the Q-factor of the p-i-n diode will have relatively less loading on the phase noise of the HBT oscillator. Moreover, since the p-i-n diode is isolated from the base-emitter junction, the configuration will result in reduced frequency pulling and generation of spurious oscillation and transient effects due to the switching of the p-i-n diode quenched circuit. The use of a p-i-n diode for quenching of VCO also provides other inherent advantages over other types of semi-conductor switches, such as FET, Schottky diodes, PN diodes for quenchable VCO applications because p-i-n diodes are relative insensitive to RF and noise modulation. Because the p-i-n diode can be constructed from existing HBT collector-base MBE epitaxy layers, the quenching circuit can be manufactured relatively inexpensively.

摘要翻译： 一种适用于切换频带合成器应用的可淬火VCO。 VCO可以由公共集电器配置中的异质结双极晶体管（HBT）形成。 包括p-i-n二极管的淬火电路与HBT的集电器串联电耦合。 p-i-n二极管适于与HBT单片集成。 由于pin二极管与HBT的集电极电连接，与形成主振荡器反馈环路的HBT的基极和发射极端子相反，因此pin二极管的Q因子在相位上的负载相对较小 HBT振荡器的噪声。 此外，由于p-i-n二极管与基极 - 发射极结隔离，所以由于p-i-n二极管骤冷电路的切换，该结构将导致降低的频率拉动和寄生振荡的产生以及瞬态效应。 与其他类型的半导体开关（例如FET，肖特基二极管，用于可淬灭的VCO应用的PN二极管）相比，使用p-i-n二极管来淬灭VCO也具有其他固有的优点，因为p-i-n二极管对RF和噪声调制相对不敏感。 因为p-i-n二极管可以由现有的HBT集电极基极MBE外延层构成，所以可以相对廉价地制造淬火电路。

公开(公告)号：US5852388A

公开(公告)日：1998-12-22

申请号：US901258

申请日：1997-07-28

申请人： Shinya Nakai ,  Masashi Katsumata ,  Yasuyuki Hattori ,  Kenta Nagai ,  Yoshiaki Fukumitsu ,  Takehiko Ishizuka

发明人： Shinya Nakai ,  Masashi Katsumata ,  Yasuyuki Hattori ,  Kenta Nagai ,  Yoshiaki Fukumitsu ,  Takehiko Ishizuka

IPC分类号： H03B1/00 ,  H03B5/12 ,  H03B5/18

CPC分类号： H03B5/1847 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/124 ,  H03B5/1243 ,  H03B5/1256 ,  H03B5/1293 ,  H03B2200/0024 ,  H03B2200/004 ,  H03B2201/011 ,  H03B2201/012 ,  H03B2201/0208 ,  H03B2201/03

摘要： A voltage controlled oscillator including a resonator which generates an oscillation signal, a frequency of which is in response to a control signal, and an amplifier which amplifies the oscillation signal. Also included is a frequency adjusting mechanism, as well as a voltage control sensitivity mechanism. In one example, the resonator includes an input terminal to which the control signal is applied, a variable capacitance diode and a main inductor. The oscillation frequency adjusting mechanism includes a first variable capacitor, arranged in parallel with the main inductor of the resonator. In addition, the voltage control sensitivity adjusting mechanism includes a second variable capacitor arranged between the input terminal and the amplifying mechanism, and also arranged between a hot terminal of the variable capacitance diode and a hot terminal of the main inductor.

摘要翻译： 一种压控振荡器，包括产生其频率响应于控制信号的振荡信号的谐振器和放大振荡信号的放大器。 还包括频率调节机构以及电压控制灵敏度机构。 在一个示例中，谐振器包括施加控制信号的输入端子，可变电容二极管和主电感器。 振荡频率调节机构包括与谐振器的主电感并联布置的第一可变电容器。 此外，电压控制灵敏度调节机构包括布置在输入端子和放大机构之间的第二可变电容器，并且还布置在可变电容二极管的热端子和主电感器的热端子之间。

公开(公告)号：US5697095A

公开(公告)日：1997-12-09

申请号：US447250

申请日：1995-05-22

申请人： Syuuji Matsuura

发明人： Syuuji Matsuura

IPC分类号： H03B1/00 ,  H03B1/02 ,  H03B1/04 ,  H03B5/12 ,  H03B5/18 ,  H04B1/16 ,  H04B1/26

CPC分类号： H04B1/1607 ,  H03B5/1221 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1847 ,  H03B1/02 ,  H03B2200/0034 ,  H03B2200/004 ,  H03B2200/0082 ,  H03B2200/0088 ,  H03B2201/0208 ,  H03B2201/0225 ,  H03B2202/027 ,  H03B2202/03 ,  H03B2202/086

摘要： There is provided a tuner capable of improving reliability thereof with reduced power consumption and reduced heat generation. In the tuner, one wideband amplifier circuit including one transistor constitutes a buffer amplifier. The wideband amplifier circuit is coupled with a first local oscillator circuit in a DC coupling style. With the above-mentioned arrangement, the buffer amplifier is allowed to have a simplified circuit construction and reduce noises. Since the amplifier circuit and the local oscillator circuit are coupled with each other in a DC coupling style, reduced power consumption can be achieved.

摘要翻译： 提供了一种能够在降低功耗并减少发热的情况下提高可靠性的调谐器。 在调谐器中，包括一个晶体管的一个宽带放大器电路构成缓冲放大器。 宽带放大器电路以直流耦合方式与第一本地振荡器电路耦合。 通过上述结构，缓冲放大器被允许具有简化的电路结构并降低噪声。 由于放大器电路和本地振荡器电路以直流耦合方式彼此耦合，所以可以实现降低的功耗。

公开(公告)号：US5565821A

公开(公告)日：1996-10-15

申请号：US492327

申请日：1995-06-20

申请人： Simo Murtojarvi

发明人： Simo Murtojarvi

IPC分类号： H03B1/00 ,  H03B5/18 ,  H03J3/18

CPC分类号： H03J3/185 ,  H03B5/1847 ,  H03B2200/0006 ,  H03B2200/0008 ,  H03B2200/001 ,  H03B2200/004 ,  H03B2200/0092 ,  H03B2201/0208 ,  H03B5/1852

摘要： The object of the invention is a voltage controlled oscillator with improved tuning linearity, which comprises an oscillating transistor (T, 1), a resonator circuit (C11, C12, 11, 12, 19, 20) formed by a capacitance diode (D, 20) and an inductance (L1, 19), whereby the resonator circuit is connected to one of the transistor's (T, 1) electrodes and defines together with the transistor's internal capacitance and external capacitances the oscillator output frequency provided by the transistor. The output frequency can be changed with an external control voltage (V.sub.cntrl) supplied to the cathode of the capacitance diode (D, 20), the control voltage having minimum and maximum values, whereby the oscillator output frequency (f.sub.vco) is arranged to change within a certain frequency band in accordance with the control voltage (V.sub.cntrl). The resonance circuit (RES) is arranged at the current draining electrode (collector) of the transistor to have an effect on the linearity between the control voltage (V.sub.cntrl) and the output frequency (f.sub.vco). The resonance circuit according to the invention provides an approximately linear tuning sensitivity also at low control voltages.

摘要翻译： 本发明的目的是提供调谐线性度改善的压控振荡器，其包括振荡晶体管（T，1），由电容二极管（D，D）形成的谐振器电路（C11,12c,11,12,19,20） 20）和电感（L1,19），由此谐振器电路连接到晶体管（T，1）电极中的一个，并与晶体管的内部电容和外部电容一起定义晶体管提供的振荡器输出频率。 可以通过提供给电容二极管（D，20）的阴极的外部控制电压（Vcntrl）来改变输出频率，控制电压具有最小和最大值，由此振荡器输出频率（fvco）被设置为在 根据控制电压（Vcntrl）的一定频带。 谐振电路（RES）布置在晶体管的引流电极（集电极）处以对控制电压（Vcntr1）和输出频率（fvco）之间的线性度具有影响。 根据本发明的谐振电路在低控制电压下也提供近似线性的调谐灵敏度。

公开(公告)号：US5523720A

公开(公告)日：1996-06-04

申请号：US361636

申请日：1994-12-22

申请人： Noriaki Omoto

发明人： Noriaki Omoto

IPC分类号： H03B5/12 ,  H03B5/18 ,  H03D3/24 ,  H03D3/00 ,  H03L7/08

CPC分类号： H03D3/241 ,  H03B5/1215 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1847 ,  H03B2200/004 ,  H03B2200/0098 ,  H03D2200/0047 ,  H03D2200/009

摘要： A frequency modulation signal demodulator receives an intermediate frequency signal to demodulate a FM signal. The frequency modulation signal demodulator includes a voltage-controlled oscillator having variable capacitance diodes. The voltage-controlled oscillator varies the oscillating frequency of a signal by controlling a voltage across the variable capacitance diodes using a DC voltage. Also included is a phase comparator which produces a phase difference by comparing the phase of the intermediate frequency signal to the phase of the signal from the voltage-controlled oscillator and provides a direct current voltage signal corresponding to the phase difference. Also included is a differential amplifier which has an adjustable reference voltage source. The differential amplifier amplifies the direct current voltage signal to produce a demodulated signal. The demodulated signal is negatively fed back to the voltage-controlled oscillator as the direct current signal.

摘要翻译： 频率调制信号解调器接收中频信号以解调FM信号。 调频信号解调器包括具有可变电容二极管的压控振荡器。 压控振荡器通过使用DC电压控制可变电容二极管两端的电压来改变信号的振荡频率。 还包括一个相位比较器，通过将中频信号的相位与来自压控振荡器的信号的相位进行比较来产生相位差，并提供对应于相位差的直流电压信号。 还包括具有可调参考电压源的差分放大器。 差分放大器放大直流电压信号以产生解调信号。 解调信号作为直流信号被负反馈给压控振荡器。

公开(公告)号：US5373259A

公开(公告)日：1994-12-13

申请号：US57028

申请日：1993-05-05

申请人： Scott Hackman ,  Anthony J. Estrada

发明人： Scott Hackman ,  Anthony J. Estrada

IPC分类号： H03B1/00 ,  H03B5/18 ,  H03L7/099 ,  H03L7/183

CPC分类号： H03L7/183 ,  H03B5/1847 ,  H03L7/099 ,  H03B2200/004 ,  H03B2201/0208

摘要： A voltage controlled oscillator comprises more than one dissimilar diode. The dissimilar diodes have different capacitance versus voltage characteristic shapes. The dissimilarity causes the tuning gain factor of the resulting oscillator to be an increasing function of increasing frequency. Such an oscillator when properly incorporated into a phase lock loop can yield loop parameters which are a constant function of increasing frequency.

摘要翻译： 压控振荡器包括多个不同的二极管。 不同的二极管具有不同的电容对电压特性形状。 不相似性导致所得振荡器的调谐增益因子是增加频率的增加函数。 这种振荡器在适当地并入锁相环时可以产生作为增加频率的常数函数的循环参数。

公开(公告)号：US5231361A

公开(公告)日：1993-07-27

申请号：US474909

申请日：1990-02-05

申请人： Duncan M. Smith ,  Barry R. Allen

发明人： Duncan M. Smith ,  Barry R. Allen

IPC分类号： H03B1/00 ,  H03B5/18

CPC分类号： H03B5/1847 ,  H03B2200/004 ,  H03B2200/007 ,  H03B2200/0098 ,  H03B2201/0208

摘要： The present invention resides in a push-push voltage controlled oscillator (VCO) utilizing parallel LC resonant tank circuits for improved phase noise characteristics. The push-push VCO of the present invention includes two voltage controlled oscillators connected in parallel and in phase opposition, with each oscillator including a transistor connected in series with the parallel LC resonant tank circuit. The oscillators operate at the same resonant frequency f.sub.0, but are 180 degrees out of phase. Therefore, the fundamental and odd harmonics of the resonant frequency f.sub.0 cancel each other out and the even harmonics add together to produce an output signal at twice the resonant frequency f.sub.0.

摘要翻译： 本发明在于推进压控振荡器（VCO），其利用并联LC谐振回路来改善相位噪声特性。 本发明的推挽VCO包括并联连接和相位相对的两个压控振荡器，每个振荡器包括与并联LC谐振回路串联的晶体管。 振荡器以相同的谐振频率f0工作，但相位相差180度。 因此，谐振频率f0的基波和奇次谐波彼此抵消，偶次谐波相加在一起，以产生谐振频率f0的两倍的输出信号。

公开(公告)号：US5138284A

公开(公告)日：1992-08-11

申请号：US722468

申请日：1991-06-27

申请人： Hiroyuki Yabuki ,  Haruyoshi Endo ,  Morikazu Sagawa ,  Mitsuo Makimoto

发明人： Hiroyuki Yabuki ,  Haruyoshi Endo ,  Morikazu Sagawa ,  Mitsuo Makimoto

IPC分类号： H01P7/08 ,  H01P5/10 ,  H03B1/04 ,  H03B5/18 ,  H03B19/14 ,  H03F3/45 ,  H03F3/60 ,  H03F3/68

CPC分类号： H03B5/1847 ,  H03B19/14 ,  H03B2200/0008 ,  H03B2200/0016 ,  H03B2200/007 ,  H03B2200/0088 ,  H03B2202/07 ,  H03B2202/086

摘要： A push-push oscillator comprises: a resonator having a transmission line and a capacitance connected to the transmission line in parallel; an oscillator for producing two outputs having an antiphase relation therebetween in response to the resonator; and a differential signal producing circuit for producing a differential signal in accordance with difference between these two outputs. These outputs can be obtained from the resonator. The transmission lines comprise strip line or microstrip line which is curved to form an open loop. The transmission line may be made of a dielectric material and is curved to form an open loop whose both ends are connected to a capacitance. The resonator may further comprise two second transmission lines, each provided to an end of the transmission line, these two second transmission lines facing each other with a given distance therebetween, the distance and length of the second transmission lines being determined such that necessary capacitance is provided. Impedance of each portion of the resonator is determined to miniaturize the resonator. The differential signal producing circuit comprises a balanced to unbalanced converting circuit.

摘要翻译： 按压式振荡器包括：具有传输线和并联连接到传输线的电容的谐振器; 用于响应谐振器产生具有反相关系的两个输出的振荡器; 以及用于根据这两个输出之间的差产生差分信号的差分信号产生电路。 这些输出可以从谐振器获得。 传输线包括弯曲形成开环的带状线或微带线。 传输线可以由介电材料制成，并且被弯曲以形成其两端连接到电容的开环。 谐振器可以进一步包括两条第二传输线，每条第二传输线分别设置在传输线的一端，这两条第二传输线彼此面对给定的距离，第二条传输线的距离和长度被确定为使得必要的电容是 提供。 确定谐振器的每个部分的阻抗以使谐振器小型化。 差分信号产生电路包括平衡到不平衡转换电路。

公开(公告)号：US5027429A

公开(公告)日：1991-06-25

申请号：US393179

申请日：1989-08-14

申请人： Tatsuru Kojima

发明人： Tatsuru Kojima

IPC分类号： H03L7/18 ,  H03B5/18 ,  H03C3/00 ,  H03C3/06 ,  H03C3/09 ,  H03C3/22 ,  H04B1/26

CPC分类号： H03C3/095 ,  H03B5/1847 ,  H03C2200/0033 ,  H03C2200/005 ,  H03C2200/0079 ,  H03C3/06 ,  H03C3/22

摘要： A frequency modulator utilizing a frequency synthesizer is disclosed. The modulator is especially useful in a mobile radio communication apparatus. The synthesizer includes a phase locked loop made up of a voltage controlled oscillator (VCO), a programmable frequency divider, a phase comparator, a second frequency divider, a reference oscillator, and a low-pass filter. When a channel control signal is input to the programmable frequency divider, the modulator sensitivity of the voltage controlled oscillator is undesirably deviated according to the channel selection. An increase of the modulator sensitivity due to an increase of the oscillation frequency is compensated for by adding a simple FET to the VCO bias circuit. A control voltage from the phase locked loop is applied to both the voltage controlled oscillator and its bias circuit. The modulator can compensate for changes in sensitivity over a wider frequency bandwidth without expanding the circuit elements of the bias circuit therefore making the modulator especially useful for portable use.

公开(公告)号：US4769621A

公开(公告)日：1988-09-06

申请号：US86712

申请日：1987-08-18

申请人： Issy Kipnis

发明人： Issy Kipnis

IPC分类号： H03B5/18 ,  H03D7/12 ,  H03D9/06 ,  H03B5/00 ,  H03B21/01

CPC分类号： H03B5/187 ,  H03D7/12 ,  H03D9/0666 ,  H03B5/1847

摘要： A frequency divider is disclosed that includes two bipolar transistors coupled as a Darlington pair, where the base of the first transistor receives an input signal to be divided, and where the common collectors of the transistors generate an output signal having a frequency equal to one-half or other integer submultiple of the input signal. The frequency divider also includes a feedback network operable for coupling a portion of the output signal from the output side of the transistors to the input side of the transistors. Such a frequency divider can provide signal conversion gain at microwave frequencies.

摘要翻译： 公开了一种分频器，其包括耦合为达林顿对的两个双极晶体管，其中第一晶体管的基极接收待分割的输入信号，并且其中晶体管的公共集电极产生具有等于1的频率的输出信号， 输入信号的一半或其他整数倍。 分频器还包括反馈网络，其可操作用于将来自晶体管的输出侧的输出信号的一部分耦合到晶体管的输入侧。 这样的分频器可以在微波频率下提供信号转换增益。