公开(公告)号：US5745013A

公开(公告)日：1998-04-28

申请号：US756347

申请日：1996-11-26

申请人： Henning Hohmann

发明人： Henning Hohmann

IPC分类号： H03B1/00 ,  H03B5/12 ,  H03J5/24 ,  H03B5/08

CPC分类号： H03B5/1231 ,  H03B5/1209 ,  H03B5/1243 ,  H03B2200/004 ,  H03B2200/0048 ,  H03B2200/0056 ,  H03B2200/0098 ,  H03B2201/0208

摘要： A variable-frequency oscillator configuration, in particular for tuners, includes a feedback network for an oscillator amplifier. The feedback network contains a series circuit formed by two resonant circuit inductors and a resonant circuit capacitor, connected in parallel with a series circuit formed by a further resonant circuit capacitor and a variable capacitor. A switching device is connected to a coupling node between the two inductors, for short circuiting the first resonant circuit capacitor and the resonant circuit inductor connected thereto under the control of a switching signal. The feedback network can consequently be switched over between two frequency bands and is symmetrical with regard to the high-frequency effect.

摘要翻译： 特别是用于调谐器的可变频率振荡器配置包括用于振荡器放大器的反馈网络。 反馈网络包含由两个谐振电路电感器和谐振电路电容器构成的串联电路，该谐振电路电容器与由另外的谐振电路电容器和可变电容器形成的串联电路并联连接。 开关装置连接到两个电感器之间的耦合节点，用于在开关信号的控制下短路第一谐振电路电容器和与其连接的谐振电路电感器。 因此，反馈网络可以在两个频带之间切换，并且关于高频效应是对称的。

公开(公告)号：US5479137A

公开(公告)日：1995-12-26

申请号：US165936

申请日：1993-12-14

申请人： Jack R. Harford

发明人： Jack R. Harford

IPC分类号： H03B5/08 ,  H03B5/12 ,  H03B5/36

CPC分类号： H03B5/1231 ,  H03B5/1209 ,  H03B5/1221 ,  H03B2200/0098

摘要： An oscillator, constructed partially within the confines of a monolithic integrated circuit, includes a differential-input, differential-output, differential amplifier within the monolithic integrated circuit. First and second resistive potential dividers located within the monolithic integrated circuit respectively divide the potentials appearing at the first and second output terminals of the differential amplifier in a predetermined ratio for respective application to the first and second input terminals of the differential amplifier, thereby respectively completing first and second direct-coupled regenerative feedback connections. An inductor located outside the monolithic integrated circuit is connected between the first and second input terminals of the differential amplifier and is anti-resonated by one or more capacitors, which may be located inside or outside the monolithic integrated circuit. In controlled versions of the oscillator, a further differential-input, differential-output, differential amplifier is included within the monolithic integrated circuit and connected to provide Miller amplification of capacitors used in anti-resonating the inductor. The gain of this further differential amplifier is electrically controlled for controlling the frequency of the oscillations generated by the oscillator. In addition to providing Miller feedback, which is degenerative in nature and tends in varying degree to reduce the amplitude of oscillations, this further differential amplifier is arranged for providing regenerative feedback to counteract this tendency to reduce the amplitude of oscillations.

摘要翻译： 在单片集成电路的局限下部分构成的振荡器包括单片集成电路内的差分输入差分输出差分放大器。 位于单片集成电路内的第一和第二电阻分压器分别将差分放大器的出现在第一和第二输出端子处的电位以预定比例分别分配给差分放大器的第一和第二输入端，从而分别完成 第一和第二直流再生反馈连接。 位于单片集成电路外部的电感器连接在差分放大器的第一和第二输入端之间，并且可被位于单片集成电路内部或外部的一个或多个电容器反谐振。 在振荡器的受控版本中，单片集成电路中还包括另一个差分输入差分放大器，并连接到提供用于反谐振电感器的电容器的米勒放大。 该进一步的差分放大器的增益被电控制以控制由振荡器产生的振荡的频率。 除了提供本质上是退化的并且在不同程度上趋于减小振荡幅度的米勒反馈之外，该另外的差分放大器被设置用于提供再生反馈以抵消这种降低振荡幅度的趋势。

公开(公告)号：US5126697A

公开(公告)日：1992-06-30

申请号：US616400

申请日：1990-11-21

申请人： Hendrikus C. Nauta ,  Ernst H. Nordholt

发明人： Hendrikus C. Nauta ,  Ernst H. Nordholt

IPC分类号： H03L7/06 ,  H03B1/00 ,  H03B5/12 ,  H03B5/32 ,  H03B5/36

CPC分类号： H03B5/368 ,  H03B5/1209 ,  H03B5/1231 ,  H03B5/1271 ,  H03B2200/0036 ,  H03B2200/004 ,  H03B2201/0208

摘要： Voltage controlled oscillator provided with a resonant network, an amplifier and a reactive network, all incorporated in an oscillator loop, the reactive network having one or more reactive components whose values depend on a control signal fed to a control input, so that the oscillator frequency can be regulated with said control signal. A control loop is provided between the resonant network and the reactive network, with which control loop the difference is determined between a measure of the imaginary part of the impedance or admittance of the resonant network and the control signal acting as reference quantity. The imaginary part of the impedance or admittance of the reactive network is regulated with said difference. The control loop contains a derivation circuit for deriving said measure and a differential amplifier, to one input of which the output signal of the derivation circuit is fed and to the other input of which the control signal is fed.

公开(公告)号：US5012205A

公开(公告)日：1991-04-30

申请号：US547258

申请日：1990-07-02

申请人： William J. Howell

发明人： William J. Howell

IPC分类号： H03B5/12

CPC分类号： H03B5/1231 ,  H03B5/1209 ,  H03B5/125

摘要： A balanced oscillator circuit having first and second outputs includes a transistor circuit, having internal parasitic capacitors, for providing first and second output signals at the first and second outputs of the balanced oscillator circuit. An inductor circuit is coupled between the first and second outputs such that the inductor circuit and the internal parasitic capacitors determine the frequency of oscillation of the first and second output signals. The capacitance of the internal parasitic capacitors can be varied by an external voltage applied to the transistor circuit.

摘要翻译： 具有第一和第二输出的平衡振荡器电路包括具有内部寄生电容器的晶体管电路，用于在平衡振荡器电路的第一和第二输出处提供第一和第二输出信号。 电感电路耦合在第一和第二输出端之间，使得电感器电路和内部寄生电容确定第一和第二输出信号的振荡频率。 可以通过施加到晶体管电路的外部电压来改变内部寄生电容器的电容。

公开(公告)号：US4816779A

公开(公告)日：1989-03-28

申请号：US92810

申请日：1987-09-03

申请人： Cornelis A. M. Boon ,  Ernst H. Nordholt

发明人： Cornelis A. M. Boon ,  Ernst H. Nordholt

IPC分类号： H03B5/12 ,  H03G11/00 ,  H03L5/00

CPC分类号： H03L5/00 ,  H03B5/1209 ,  H03B5/1231 ,  H03G11/002 ,  H03B2200/0036

摘要： An oscillator circuit which includes a differential amplifier in combination with a negative feedback network and a positive feedback network connected to the amplifier. One of these networks determines the frequency of the generated oscillation. In order to obtain an oscillation of constant amplitude, the negative feedback network comprises a current limiter active as a controllable one-port network which is connected between the negative feedback input of the differential amplifier and a fixed potential.

公开(公告)号：US4492934A

公开(公告)日：1985-01-08

申请号：US346234

申请日：1982-02-05

申请人： Yasuhiro Sugimoto

发明人： Yasuhiro Sugimoto

IPC分类号： H03B5/12 ,  H03B5/04

CPC分类号： H03B5/1231 ,  H03B5/1209 ,  H03B5/125 ,  H03B5/1293 ,  H03B2200/0092

摘要： A voltage controlled oscillator is provided with an LC parallel resonance circuit connected to the collector of one of a differential pair of transistors, and an amplifier and a capacitor which are connected between the collector of the one transistor and the base of the other transistor. The bases of the differential pair of transistors are equally biased. The emitters of the transistors are connected to a variable current source. The variable current source produces a current proportional to the square of control voltage. The frequency of the VCO can be changed by the control voltage with good linearity over a wide dynamic range. The variable current source causes the VCO characteristic to be linear. The value of the capacitor can be small, making the oscillator circuit well suited for integrated circuit fabrication.

摘要翻译： 压控振荡器设置有连接到差分对晶体管之一的集电极的LC并联谐振电路，以及连接在一个晶体管的集电极和另一个晶体管的基极之间的放大器和电容器。 差分对晶体管的基极同样偏置。 晶体管的发射极连接到可变电流源。 可变电流源产生与控制电压的平方成比例的电流。 可以通过在宽动态范围内具有良好线性度的控制电压来改变VCO的频率。 可变电流源使VCO特性为线性。 电容器的值可以很小，使得振荡器电路非常适合于集成电路制造。

公开(公告)号：US4270102A

公开(公告)日：1981-05-26

申请号：US33358

申请日：1979-04-26

申请人： Glenn B. Gawler ,  Robert J. McFadyen

发明人： Glenn B. Gawler ,  Robert J. McFadyen

IPC分类号： H03B5/12 ,  H03L1/02

CPC分类号： H03L1/02 ,  H03B5/1209 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1284

摘要： A FM local oscillator circuit suitable for integrated circuit fabrication, the frequency of which responds to a first current component for reducing frequency drift of a tuned frequency as a function of temperature and to a second current component for providing automatic frequency control of said tuned frequency. The circuit comprises a cross coupled differential pair of transistors, adapted to be coupled to a tuned circuit manually tunable over a given frequency range, which exhibit a negative conductance substantially controlled by said first current component for sustaining oscillations over said given frequency range and which further exhibit a variable capacitance controlled by said second current component for providing electronic fine tuning of the oscillator circuit. The emitters of the differential transistor pair are joined and coupled to first and second current sources, the first of which is temperature compensated for generating said first current component and the second of which is selectively controlled by an AFC control signal for generating said second current component.

摘要翻译： 一种适用于集成电路制造的FM本地振荡器电路，其频率响应于第一电流分量，用于降低作为温度的函数的调谐频率的频率漂移以及用于提供所述调谐频率的自动频率控制的第二电流分量。 电路包括交叉耦合的差分对晶体管，适于耦合到在给定频率范围上可手动调谐的调谐电路，该调谐电路显示出基本上由所述第一电流分量控制的负电导，用于维持所述给定频率范围上的振荡， 呈现由所述第二电流分量控制的可变电容，用于提供振荡器电路的电子微调。 差分晶体管对的发射极被连接并耦合到第一和第二电流源，第一和第二电流源被温度补偿以产生所述第一电流分量，其中第二电流分量由AFC控制信号选择地控制，以产生所述第二电流分量 。

公开(公告)号：US4243953A

公开(公告)日：1981-01-06

申请号：US12811

申请日：1979-02-16

申请人： Alvin R. Balaban ,  Steven A. Steckler

发明人： Alvin R. Balaban ,  Steven A. Steckler

IPC分类号： H03B5/00 ,  H03B5/12 ,  H03L7/099 ,  H03L7/08

CPC分类号： H03L7/099 ,  H03B5/1209 ,  H03B5/1212 ,  H03B5/1221 ,  H03B5/1231 ,  H03B5/1243

摘要： A variable-frequency oscillator includes an oscillator portion coupled to a phase shifter and a controllable gain device for controlling the amount of phase-shifted signal reintroduced to the oscillator. The oscillator includes first and second transistors coupled at their emitters to a current source. The emitters of third and fourth transistors are coupled to bases of the first and second transistors, respectively. The base of the third transistor is coupled to a voltage source, and the base of the fourth transistor couples to the collector of the first to form a regenerative loop capable of oscillation. A parallel-resonant circuit is coupled between the collector of the first transistor and the voltage source for establishing a frequency-sensitive phase characteristic in the loop by which the quiescent frequency is determined. The phase shifter is coupled to a point on the regenerative loop. The controllable gain device is coupled to the output of the phase shifter and reinjects a variable-amplitude version of the phase-shifted signal to a second point on the loop for establishing the oscillation frequency.

摘要翻译： 可变频率振荡器包括耦合到移相器的振荡器部分和用于控制重新引入振荡器的相移信号量的可控增益器件。 振荡器包括在其发射极处耦合到电流源的第一和第二晶体管。 第三和第四晶体管的发射极分别耦合到第一和第二晶体管的基极。 第三晶体管的基极耦合到电压源，第四晶体管的基极耦合到第一晶体管的集电极，以形成能够振荡的再生回路。 并联谐振电路耦合在第一晶体管的集电极和电压源之间，用于在确定静态频率的环路中建立频敏相位特性。 移相器耦合到再生环路上的一个点。 可控增益装置耦合到移相器的输出，并将相移信号的可变幅度版本重新注入到环路上的第二点以建立振荡频率。

公开(公告)号：US3292106A

公开(公告)日：1966-12-13

申请号：US39267464

申请日：1964-08-20

申请人： RANK BUSH MURPHY LTD

发明人： EDWIN BALDWIN JOHN LEWIS

IPC分类号： H03B5/12 ,  H03C3/00

CPC分类号： H03C3/00 ,  H03B5/1209 ,  H03B5/1231 ,  H03B5/1256 ,  H03B5/1296

公开(公告)号：US09917547B2

公开(公告)日：2018-03-13

申请号：US14651238

申请日：2013-01-09

申请人： Hao Li

发明人： Hao Li

IPC分类号： H03B5/12 ,  G01S7/02 ,  H03B5/18 ,  H03B5/00 ,  G01S13/00

CPC分类号： H03B5/1206 ,  G01S7/02 ,  H03B5/1209 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/18

摘要： A voltage controlled oscillator (VCO) comprising a first supply node, a second supply node, an oscillation transistor, a biasing network, an output node and a feedback network is described. The VCO is be powered by a supply voltage applied across the first and second supply nodes. The oscillation transistor and the biasing network are connected in series between the first supply node and the second supply node. The output node is connected to the oscillation transistor so as to deliver an oscillatory output signal. The feedback network provides an oscillatory feedback signal from the output node to the biasing network. The feedback network comprises a capacitive element and a transmission line connected in series for transferring the feedback signal. The VCO may be integrated in a radar device, for example.