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    OSCILLATION CIRCUIT AND A SEMICONDUCTOR CIRCUIT DEVICE HAVING THE OSCILLATION CIRCUIT
    12.
    发明申请
    OSCILLATION CIRCUIT AND A SEMICONDUCTOR CIRCUIT DEVICE HAVING THE OSCILLATION CIRCUIT 审中-公开
    振荡电路和具有振荡电路的半导体电路装置

    公开(公告)号：US20070146088A1

    公开(公告)日：2007-06-28

    申请号：US11614634

    申请日：2006-12-21

    Applicant: Izumi ARAI ,  Kazuaki Hori

    Inventor： Izumi ARAI ,  Kazuaki Hori

    IPC: H03B5/08

    CPC classification number: H03B5/1228 ,  H03B5/1215 ,  H03B5/1243 ,  H03B5/1265 ,  H03B5/1268 ,  H03B2200/0048 ,  H03B2201/0216 ,  H03B2201/0266

    Abstract: There is provided an LC resonance type oscillation circuit with a wide frequency variable range with a small variation of Q and capable of reducing a chip size due to no external parts required, and a communication semiconductor circuit device (high-frequency IC) having the oscillation circuit. In the LC resonance type oscillation circuit, a capacitance element and a switch element are connected in parallel between both terminals of a secondary side inductance element which is placed facing an inductance element constituting the LC resonance circuit and is connected by mutual induction to the inductance element. It is designed so that an equivalent inductance increases as the capacitance element is connected between the both terminals of the secondary side inductance element in a state where the switch element is turned OFF, and that the equivalent inductance decreases as the both terminals of the secondary side inductance element are short-circuited in a state where the switch element is turned ON.

    Abstract translation: 提供了具有较小变化范围的宽频率可变范围的LC谐振型振荡电路，并且由于不需要外部部件而能够减小芯片尺寸，并且具有振荡的通信半导体电路装置（高频IC） 电路。 在LC谐振型振荡电路中，电容元件和开关元件并联连接在二次侧电感元件的两个端子之间，二次侧电感元件面对构成LC谐振电路的电感元件，并通过互感连接到电感元件 。 其设计成使得当开关元件断开的状态下电容元件连接在次级侧电感元件的两端之间时，等效电感增加，并且等效电感随着次级侧的两端而减小 电感元件在开关元件导通的状态下短路。

    Widely tuneable and fully differential LC oscillator utilizing an active inductor
    14.
    发明申请
    Widely tuneable and fully differential LC oscillator utilizing an active inductor 失效
    使用有源电感器的广泛可调和全差分LC振荡器

    公开(公告)号：US20050046502A1

    公开(公告)日：2005-03-03

    申请号：US10653588

    申请日：2003-09-02

    Applicant: Prashant Singh ,  Donald Grillo ,  Brett Hardy

    Inventor： Prashant Singh ,  Donald Grillo ,  Brett Hardy

    IPC: H03B1/00 ,  H03B5/12 ,  H03K3/354 ,  H03B7/00

    CPC classification number: H03K3/354 ,  H03B5/1212 ,  H03B5/1221 ,  H03B5/1228 ,  H03B5/1256 ,  H03B2201/0216

    Abstract: An inductor-capacitor voltage controlled oscillator is implemented using an active inductor. The active inductor may use bipolar technology or CMOS technology. The VCO with an active inductor offers a more compact design and is useable with flip chip technology. The active inductor may be implemented in bipolar junction or complementary metal oxide semiconductor technology. The configuration of the voltage controlled oscillator with an active inductor of the present invention is fully differential and fully symmetric.

    Abstract translation: 使用有源电感器实现电感器 - 电容器压控振荡器。 有源电感可以使用双极技术或CMOS技术。 具有有源电感的VCO提供更紧凑的设计，可用于倒装芯片技术。 有源电感器可以实现在双极结或互补金属氧化物半导体技术中。 具有本发明的有源电感器的压控振荡器的结构是完全差分的和完全对称的。

    Voltage controlled oscillator with controlled capacitance ratio in positive feedback loop to broaden bandwidth
    15.
    发明授权
    Voltage controlled oscillator with controlled capacitance ratio in positive feedback loop to broaden bandwidth 失效
    电压控制振荡器在正反馈回路中具有受控电容比，以扩大带宽

    公开(公告)号：US5160902A

    公开(公告)日：1992-11-03

    申请号：US727839

    申请日：1991-07-09

    Applicant: Hiroshi Saeki ,  Hatsuo Motoyama

    Inventor： Hiroshi Saeki ,  Hatsuo Motoyama

    IPC: H03B1/00 ,  H03B5/12 ,  H03B19/16 ,  H03B19/20 ,  H03B21/01 ,  H03L7/093 ,  H03L7/113

    CPC classification number: H03B19/16 ,  H03B19/20 ,  H03B21/01 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1262 ,  H03B5/1293 ,  H03L7/093 ,  H03L7/113 ,  H03B2200/0034 ,  H03B2200/0042 ,  H03B2201/0208 ,  H03B2201/0216 ,  H03B2201/033

    Abstract: A voltage controlled oscillator comprises a resonant circuit having at least a coil and a first variable capacitance diode, and resonating within predetermined variable frequency ranges; and an active circuit having an input, an output, and an active element connected between the input and the output, the input being connected to the resonant circuit in order to receive a resonant output therefrom. A variable capacitance ratio circuit, having a second variable capacitance diode and at least one capacitor, is connected in a positive feedback manner, between the input and the output of said active circuit means in order to oscillate the active element of the active circuit at a resonant frequency of the resonant circuit, between the input and the output of the active circuit. A variable controller is provided for changing a resonant frequency of the resonant circuit, to thereby apply a control voltage to the first and second variable capacitance diodes and to control a capacitance ratio between the at least one capacitor and the second variable capacitance diode in the variable capacitance ratio circuit, so that an oscillator frequency of the active element can be changed substantially linearly over a wide bandwidth of no less than one octachord in accordance with a variation in the control voltage, to thereby retain the amount of positive feedback at a predetermined level against the oscillator frequency of the active circuit.

    Abstract translation: 压控振荡器包括具有至少线圈和第一可变电容二极管并在预定可变频率范围内谐振的谐振电路; 以及有源电路，其具有连接在输入和输出之间的输入，输出和有源元件，输入端连接到谐振电路，以便从其接收谐振输出。 具有第二可变电容二极管和至少一个电容器的可变电容比电路以正反馈的方式连接在所述有源电路装置的输入和输出之间，以便将有源电路的有源元件在 谐振电路的谐振频率，有源电路的输入和输出之间。 提供了一种可变控制器，用于改变谐振电路的谐振频率，从而对第一和第二可变电容二极管施加控制电压，并且控制变量中的至少一个电容器和第二可变电容二极管之间的电容比 电容比电路，使得有源元件的振荡器频率可以根据控制电压的变化在宽度不小于一个八角形的宽带宽上基本上线性地改变，从而将正反馈量保持在预定水平 针对有源电路的振荡器频率。

    Frequency snythesizer for implementing generator of highly pure signals and circuit devices, such as VCQ, BLL and SG, used therein
    16.
    发明授权
    Frequency snythesizer for implementing generator of highly pure signals and circuit devices, such as VCQ, BLL and SG, used therein 失效
    用于实施高纯度信号和电路设备的发生器的频率SNYTHESIZER，如VCQ，BLL和SG，使用它们

    公开(公告)号：US5122763A

    公开(公告)日：1992-06-16

    申请号：US570048

    申请日：1990-08-20

    Applicant: Hiroshi Saeki ,  Hatsuo Motoyama

    Inventor： Hiroshi Saeki ,  Hatsuo Motoyama

    IPC: H03B1/00 ,  H03B5/12 ,  H03B19/16 ,  H03B19/20 ,  H03B21/01 ,  H03L7/093 ,  H03L7/113

    CPC classification number: H03B19/16 ,  H03B19/20 ,  H03B21/01 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1262 ,  H03B5/1293 ,  H03L7/093 ,  H03L7/113 ,  H03B2200/0034 ,  H03B2200/0042 ,  H03B2201/0208 ,  H03B2201/0216 ,  H03B2201/033

    Abstract: A frequency synthesizer includes a control section; a first signal generator responsive to the control section for selectively outputting one of frequency signals whose frequencies are represented by Fp=a.times..vertline.P.vertline..times..DELTA.F (where the coefficient a is a positive odd number and the coefficient p is an integer); and a second signal generator responsive to the control section for selectively outputting one of frequencies whose frequencies are represented by Fq=b.times..vertline.Q.vertline..times..DELTA.F (where the coefficient b is a positive integer exclusive of integral multiples of prime factors into which a is resolved, and the coefficient Q is an integer and satisfying the expression: .vertline.Q.vertline..ltoreq.(a-1)/2. A mixer mixes a frequency signal Fp from the first signal generator and a frequency signal Fq from the second signal generator; and a frequency selecting circuit selects either of frequency signals .vertline.FP-Fq.vertline. or Fp+Fq output from the mixer. The control section determines the values of P and Q satisfying the following expresion P=T+(S-b.times.Q)/a on the basis of a desired frequency signal Fi=m.times..DELTA.F, a coefficient m=0, 1, 2, ..n set in predetermined frequency .DELTA.F; and quotient T and remainder s of m/a to cause each of the first and second signal generators to output a predetermined frequency and the frequency selecting circuit to select one of the frequency signals .vertline.Fp-Fq.vertline. and Fp+Fq that corresponds to the frequency signal Fi.

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