公开(公告)号：US06566971B1

公开(公告)日：2003-05-20

申请号：US09792684

申请日：2001-02-24

申请人： Germán Gutierrez

发明人： Germán Gutierrez

IPC分类号： H03B508

CPC分类号： H03B5/1228 ,  H03B5/1212 ,  H03B5/1253 ,  H03B5/1256

摘要： The present invention generally relates to voltage-controlled oscillators. More specifically, the present invention relates to method and circuitry for implementing a differentially tuned varactor-inductor oscillator. In one exemplary embodiment, the present invention includes an LC tank circuit having a couple of terminals, a first and second capacitors, and a first and second varactors. The first and second varactors are connected in series forming a first and a second node. The first capacitor connects the first node and one terminal of the LC tank circuit. The second capacitor connects the second node and the other terminal of the LC tank circuit. A pair of differential input control signals is applied across the first and the second varactors, respectively, to tune the LC tank circuit thereby generating an oscillator output.

摘要翻译： 本发明一般涉及压控振荡器。 更具体地，本发明涉及用于实现差分调谐变容二极管 - 电感振荡器的方法和电路。 在一个示例性实施例中，本发明包括具有一对端子，第一和第二电容器以及第一和第二可变电抗器的LC谐振电路。 第一和第二变容二极管串联连接形成第一和第二节点。 第一个电容器连接LC电路的第一个节点和一个端子。 第二电容器连接LC电路的第二节点和另一个端子。 一对差分输入控制信号分别施加在第一和第二变容二极管上，以调谐LC振荡电路，从而产生振荡器输出。

公开(公告)号：US06504443B1

公开(公告)日：2003-01-07

申请号：US09573786

申请日：2000-05-17

申请人： Antonio L. Eguizabal

发明人： Antonio L. Eguizabal

IPC分类号： H03B508

CPC分类号： H03J3/20 ,  H03B5/1206 ,  H03B5/1243 ,  H03B5/1293 ,  H03J3/185

摘要： A voltage controlled oscillator circuit in which the principal frequency determining circuit or tuning circuit comprises a pair of common anode varactor diodes. The circuit functions as a variable frequency oscillator controlled by an external DC control voltage, when utilized in conjunction with a parallel connected inductor and bypass or coupling capacitors to an oscillator circuit. This circuit has applicability as a basic building block or subcircuit for use in frequency synthesizer circuits, filter circuits, or the like, and which operate in baseband, I/F or R/F. The oscillator is a type which can be used in cellular or handheld telephones, both digital and analog, and in radio or communication equipment in general. The tuning circuit is symmetrical in form, and can isolate direct current (DC) paths of the tuning circuit from the alternating current (AC) or I/F or R/F current paths of the connected active circuit or drive circuit.

摘要翻译： 一种压控振荡器电路，其中主频率确定电路或调谐电路包括一对公共阳极变容二极管。 当与并联的电感器和旁路或耦合电容器一起用于振荡器电路时，该电路用作由外部DC控制电压控制的可变频率振荡器。 该电路作为用于频率合成器电路，滤波器电路等中的基本构建块或分支电路具有适用性，并且在基带I / F或R / F中工作。 振荡器是一种可以用于数字和模拟的蜂窝或手持电话以及一般的无线电或通信设备中的类型。 调谐电路的形式是对称的，并且可以将调谐电路的直流（DC）路径与所连​​接的有源电路或驱动电路的交流（AC）或I / F或R / F电流路径隔离开来。

公开(公告)号：US06433644B1

公开(公告)日：2002-08-13

申请号：US09887912

申请日：2001-06-20

申请人： Joseph Andrews

发明人： Joseph Andrews

IPC分类号： H03B508

摘要： A frequency oscillator tuning process at the manufacturing stage is replaced with an adjustment of a resonant circuit in the frequency oscillator during an operation of the oscillator. The adjustment utilizes a crystal oscillator, a frequency oscillator such as a voltage-controlled oscillator (VCO), and a trimmer in a phase-locked loop configuration to determine a correction voltage required for an untrimmed VCO to operate at a nominally specified frequency by adjusting an input tuning voltage for a resonant circuit.

公开(公告)号：US06420939B1

公开(公告)日：2002-07-16

申请号：US09718857

申请日：2000-11-22

申请人： Alfred Selz

发明人： Alfred Selz

IPC分类号： H03B508

CPC分类号： H03J5/244 ,  H03B5/08 ,  H03B2201/0208 ,  H03B2201/0258

摘要： The oscillator having a tunable resonant circuit has a switch for expanding the tuning range, which is connected in series with two coils jointly determining the oscillation frequency of the resonant circuit. A further coil, which is coupled to the resonant circuit in the region of the switch, is used to supply a switching voltage for the switch. In this arrangement, the other end of this third coil is coupled to a reference potential, with a capacitor, which acts as a short circuit for radio-frequency purposes, decoupling the switching voltage from the reference potential. Since the switching voltage is in this case coupled to an oscillator circuit node which is earthed for radio-frequency purposes, it is of no significance in this case which resistor is used to couple the switching voltage. This means that the resonant circuit is not resistively damped by the connection of the switching voltage. Coupled to the other end of the switching diode is a further component, preferably a fourth coil, which has the same inductance as the third coil, in order to dissipate the switching voltage. The first two coils are advantageously of the same size, so that this circuit coil jointly determining the oscillation frequency is earthed by the third coil exactly at its center. This means that the quality factor and the oscillation properties of the resonant circuit are not adversely affected.

摘要翻译： 具有可调谐谐振电路的振荡器具有用于扩展调谐范围的开关，该调谐范围与共同确定谐振电路的振荡频率的两个线圈串联连接。 在开关区域中耦合到谐振电路的另一个线圈用于为开关提供开关电压。 在这种布置中，该第三线圈的另一端通过电容器耦合到参考电位，该电容充当用于射频目的的短路，使开关电压与参考电位相分离。 由于在这种情况下，开关电压耦合到接地以用于射频目的的振荡器电路节点，所以在这种情况下使用哪个电阻来耦合开关电压是没有意义的。 这意味着谐振电路不会被开关电压的连接电阻衰减。 耦合到开关二极管的另一端是具有与第三线圈相同的电感的另一部件，优选地是第四线圈，以便消耗开关电压。 前两个线圈有利地具有相同的尺寸，使得共同确定振荡频率的该电路线圈由第三线圈正好在其中心处接地。 这意味着谐振电路的品质因数和振荡特性不会受到不利影响。

公开(公告)号：US06411168B1

公开(公告)日：2002-06-25

申请号：US09789362

申请日：2001-02-21

申请人： Daisuke Yoshida

发明人： Daisuke Yoshida

IPC分类号： H03B508

摘要： A voltage-controlled oscillator is constructed to greatly reduce the number of parts required, its overall size, and manufacturing cost. The voltage-controlled oscillator includes first and second resonance circuits, first and second oscillation circuits, a buffer circuit amplifying the oscillation signals output from the first and second oscillation circuits, and an output-matching circuit. In addition, the voltage-controlled oscillator includes a first switching circuit for controlling the oscillation of the first oscillation circuit and a second switching circuit for controlling the oscillation of the second oscillation circuit. The impedance changing of the matching circuit is simultaneously performed while switching between the switching circuits.

公开(公告)号：US06806787B2

公开(公告)日：2004-10-19

申请号：US10395116

申请日：2003-03-25

申请人： Ramon Alejandro Gomez ,  Lawrence M. Burns ,  Alexandre Kral

发明人： Ramon Alejandro Gomez ,  Lawrence M. Burns ,  Alexandre Kral

IPC分类号： H03B508

CPC分类号： H03B5/1228 ,  H03B5/1212 ,  H03B5/1243 ,  H03B5/1265 ,  H03B5/1293 ,  H03J2200/10

摘要： A varactor folding technique reduces noise in controllable electronic oscillators through the use of a series of varactors having relatively small capacitance. A folding circuit provides control signals to the varactors in a sequential manner to provide a relatively smooth change in the total capacitance of the oscillator. Consequently, effective control of the oscillator is achieved with accompanying reductions in oscillator noise such as flicker noise.

摘要翻译： 变容二极管折叠技术通过使用具有相对较小电容的一系列变容二极管来降低可控电子振荡器中的噪声。 折叠电路以顺序方式向变容二极管提供控制信号，以提供振荡器的总电容的相对平滑的变化。 因此，随着振荡器噪声（如闪烁噪声）的减少，实现了振荡器的有效控制。

公开(公告)号：US06720838B2

公开(公告)日：2004-04-13

申请号：US10288711

申请日：2002-11-05

申请人： Gordon Evan Locke

发明人： Gordon Evan Locke

IPC分类号： H03B508

CPC分类号： H03J3/04 ,  H03J3/16 ,  H03J3/20 ,  H03L5/02

摘要： An apparatus and method for continuous variable reactive impedance control. The apparatus and method enable the continuous variation of the reactive impedance of an oscillating circuit. A reactive component, in one embodiment a capacitor, is switched into the oscillating circuit for a duration at the beginning and end of each half cycle of the oscillation frequency. Through varying the duration, the oscillation frequency is varied between the frequency that occurs without the reactive component in the circuit and the frequency with the reactive component permanently in the circuit. A controller determines the duration and controls a switch coupled to the reactive component. The apparatus and method may be used to adjust the oscillation frequency of a resonant circuit or to match the resonant frequency to a driving frequency in a driven oscillating circuit so as to improve efficiency.

摘要翻译： 一种用于连续可变无功阻抗控制的装置和方法。 该装置和方法能够实现振荡电路的无功阻抗的连续变化。 在一个实施例中，电容器的无功分量在振荡频率的每个半周期的开始和结束时被切换到振荡电路中。 通过改变持续时间，振荡频率在不存在电路中的无功分量的频率和电路中的无功分量的频率之间发生变化。 控制器确定持续时间并控制耦合到无功部件的开关。 该装置和方法可用于调节谐振电路的振荡频率或将谐振频率与驱动振荡电路中的驱动频率相匹配，以提高效率。

公开(公告)号：US06633203B1

公开(公告)日：2003-10-14

申请号：US09558082

申请日：2000-04-25

申请人： Jurianto Joe

发明人： Jurianto Joe

IPC分类号： H03B508

CPC分类号： H03K5/00006

摘要： A gated oscillator is provided for digital circuits. The gated oscillator is achieved by the unconventional use of controlling the operating point of a Van der Pol oscillator. Oscillations are achieved by Van der Pol self-oscillation behavior. The result is a highly simplified gated oscillator circuit for many digital circuit applications

摘要翻译： 为数字电路提供门控振荡器。 门控振荡器通过非常规使用控制范德波尔振荡器的工作点来实现。 振荡由Van der Pol自振荡行为实现。 结果是用于许多数字电路应用的高度简化的门控振荡器电路

公开(公告)号：US06411171B1

公开(公告)日：2002-06-25

申请号：US09789542

申请日：2001-02-22

申请人： Nobuyuki Itoh

发明人： Nobuyuki Itoh

IPC分类号： H03B508

摘要： 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.

公开(公告)号：US06317006B1

公开(公告)日：2001-11-13

申请号：US09621803

申请日：2000-07-21

申请人： David R. Welland ,  Caiyi Wang

发明人： David R. Welland ,  Caiyi Wang

IPC分类号： H03B508

CPC分类号： H03L7/099 ,  H03D7/163 ,  H03J2200/10 ,  H03L7/087 ,  H03L7/187 ,  H03L7/199 ,  H03L7/23 ,  H04B1/26 ,  H04B1/30

摘要： A method and apparatus for synthesizing high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator (VCO) that has a discretely variable capacitance in conjunction with a continuously variable capacitance. The discretely variable capacitance may provide coarse tuning adjustment of the variable capacitance to compensate for capacitor and inductor tolerances and to adjust the output frequency to be near the desired frequency output. The continuously variable capacitance may provide a fine tuning adjustment of the variable capacitance to focus the output frequency to match precisely the desired frequency output. During fine tuning adjustment, the PLL may be controlled by a plurality of analog control signals. The analog control signals may be derived by first generating a plurality of phase shifted signals from a divided version of the VCO output clock by using a shift register. The shift register may be clocked by another clock signal at a higher frequency than the divided version of the VCO output clock. The phase differences between the plurality of phase shifted signals and a divided version of a reference clock may then be detected and converted to the analog control signals.

摘要翻译： 用于合成诸如无线通信信号的高频信号的方法和装置包括具有可变电容电压控制振荡器（VCO）的锁相环（PLL）频率合成器，其具有连续变量的离散可变电容 电容。 离散可变电容可以提供可变电容的粗调谐调整，以补偿电容器和电感器公差，并将输出频率调整为接近期望的频率输出。 连续可变电容可以提供可变电容的微调调整，以将输出频率聚焦以精确地匹配期望的频率输出。 在微调调整期间，PLL可以由多个模拟控制信号控制。 可以通过使用移位寄存器首先从VCO输出时钟的分割版本生成多个相移信号来导出模拟控制信号。 移位寄存器可以以比VCO输出时钟的分频版本更高的频率由另一个时钟信号来计时。 然后可以检测多个相移信号和参考时钟的分割版本之间的相位差并转换成模拟控制信号。