PROGRAMMABLE CRYSTAL OSCILLATOR
    131.
    发明申请
    PROGRAMMABLE CRYSTAL OSCILLATOR 审中-公开
    可编程晶体振荡器

    公开(公告)号:WO98034338A1

    公开(公告)日:1998-08-06

    申请号:PCT/US1998/001796

    申请日:1998-02-03

    Abstract: A programmable crystal oscillator is provided having a memory for storing frequency-defining parameters. Typically, one of these parameters is used to program an adjustable capacitive load circuit coupled to a crystal to thereby adjust the crystal source frequency. Additional parameters are used to program the output frequency of a phase locked loop circuit coupled to receive the adjusted source frequency. A further parameter can also be used to divide the output frequency of the phase locked loop circuit to supply a specified output frequency. The oscillators can be manufactured as generic programmable crystal oscillators without regard for output frequency and then quickly programmed to produce customer-specified output frequencies with a high degree of accuracy.

    Abstract translation: 提供了一种可编程晶体振荡器,其具有用于存储频率限定参数的存储器。 通常,这些参数之一用于对耦合到晶体的可调容性负载电路进行编程,从而调节晶体源频率。 附加参数用于编程耦合以接收经调整的源频率的锁相环电路的输出频率。 还可以使用另外的参数来分频锁相环电路的输出频率以提供指定的输出频率。 振荡器可以制造为通用可编程晶体振荡器,而不考虑输出频率,然后快速编程,以高精确度生成客户指定的输出频率。

    DUAL-MODE OSCILLATOR AND MULTI-PHASE OSCILLATOR
    134.
    发明公开
    DUAL-MODE OSCILLATOR AND MULTI-PHASE OSCILLATOR 审中-公开
    双模式振荡器和多相振荡器

    公开(公告)号:EP3319229A2

    公开(公告)日:2018-05-09

    申请号:EP17191767.7

    申请日:2017-09-19

    Abstract: Embodiments of this application disclose a dual-mode oscillator and a multi-phase oscillator. In the dual-mode oscillator, switching between two operating modes is implemented by using a mode switching circuit, so that oscillation signals having two different bands can be obtained. Moreover, the dual-mode oscillator includes two transformer-coupled oscillators, and a step-up transformer in any transformer-coupled oscillator multiplies a drain voltage swing of a first MOS transistor and then injects a voltage signal to a gate of a second MOS transistor, so that a larger gate voltage swing is obtained without increasing a supply voltage of the oscillator, and phase noise performance of the dual-mode oscillator is improved. In the multi-phase oscillator, multiple dual-mode transformer-coupled oscillators are connected through multi-phase coupled circuits to form a Mobius loop, so that oscillation signals in multiple phases can be generated, and phase noise performance of the entire oscillator can be improved.

    Abstract translation: 本申请的实施例公开了一种双模式振荡器和多相振荡器。 在双模振荡器中,通过使用模式切换电路来实现两种工作模式之间的切换,从而可以获得具有两个不同频带的振荡信号。 此外,双模式振荡器包括两个变压器耦合振荡器,并且任何变压器耦合振荡器中的升压变压器乘以第一MOS晶体管的漏极电压摆动,然后将电压信号注入第二MOS晶体管的栅极 ,从而在不增加振荡器的电源电压的情况下获得更大的栅极电压摆动,并且双模振荡器的相位噪声性能得到改善。 在多相振荡器中,多个双模变压器耦合振荡器通过多相耦合电路连接形成一个莫比乌斯回路,从而可以产生多相振荡信号,并且整个振荡器的相位噪声性能可以 改进。

    Apparatus and method for digitally controlling capacitance
    135.
    发明公开
    Apparatus and method for digitally controlling capacitance 审中-公开
    装置和方法,用于数字容量控制

    公开(公告)号:EP2403134A3

    公开(公告)日:2015-07-01

    申请号:EP10189160.4

    申请日:2010-10-28

    Inventor: Chen, Tse-Peng

    Abstract: An oscillator circuit having a source of an oscillating signal, a tank circuit including an inductor (18, 420, 421) and a capacitor (18, 420, 421), and a discretely switchable capacitance module (14, 314) configured to control an amount of capacitance in the oscillator circuit. The discretely switchable capacitance module (14, 314) includes, a capacitor (22, 322) coupled between a first node (41, 341) and a second node (42, 342), a switch (24, 320) coupled between the second node (42, 322) and a third node (43, 343); and a DC feed circuit (28, 328, 329), having a first end (28a, 328a, 329a) coupled to the second node (42) and a second end (28b, 328b, 329b) configured to receive a first or second control signal (30, 330). The control node (25, 325) of the switch (24, 320) is tied to a predetermined bias voltage (26, 326). When the first control signal (30, 330) is applied, the capacitor (22) is coupled between the first node (41, 341) and the third node (43, 343) via the switch (24, 320), and when the second control signal (30, 330) is applied the capacitor (22) is decoupled from the inductor (18, 420, 421).

    VARIABLE OSCILLATOR
    139.
    发明授权
    VARIABLE OSCILLATOR 有权
    可变振荡器

    公开(公告)号:EP1198879B1

    公开(公告)日:2004-04-14

    申请号:EP00946138.5

    申请日:2000-07-18

    Abstract: A variable frequency oscillator comprising: an oscillatory circuit for generating a periodic output dependant on the capacitance between a first node and a second node of the circuit, and having a capacitative element connected between the first node and the second node; the capacitative element comprising: a variable capacitance unit, the capacitance of which is variable for varying the frequency of the output; and a plurality of trimming capacitances each being selectively connectable in parallel with the variable capacitance unit between the first node and the second node to trim the frequency of the output.

    Oszillatorschaltung mit umschaltbarer Schwingfrequenz

    公开(公告)号:EP1213836A1

    公开(公告)日:2002-06-12

    申请号:EP01126887.7

    申请日:2001-11-12

    Inventor: Traub, Johann

    Abstract: Eine Oszillatorschaltung mit zuschaltbaren Kapazität (C3, C4) ermöglicht die Umschaltung des Oszillators zwischen zumindest zwei Frequenzen. Zum Umschalten ist eine Schalteinheit (TL) vorgesehen, welche einen ersten Schalter (T3) umfaßt, welcher zwischen die schaltbaren Kapazitäten (C3, C4) geschaltet ist sowie weitere Schalter (T1, T2), die gegen einen Versorgungsspannungsanschluß (GND) geschaltet sind. Gegenüber herkömmlichen umschaltbaren Oszillatoren weist die beschriebene Schaltung den Vorteil auf, daß im eingeschalteten Zustand der zuschaltbaren Kapazitäten (C3, C4) ein besonders geringer Durchlaßwiderstand, und dennoch im ausgeschalteten Zustand besonders kleine parasitäre Kapazitäten wirksam sind. Die beschriebene Oszillatorschaltung ist mit besonders geringer Chipfläche realisierbar, da die Schalter (T1, T2, T3) in einer gemeinsamen Transistorstruktur mit gemeinsamen Steueranschluß (G) integrierbar sind. Die Oszillatorschaltung ist besonders für Mobilfunkanwendungen geeignet.

    Abstract translation: 振荡器的主芯由变容二极管(D1,D2)和由电感(L1,L2)与电容器(C,C2)形成的振荡电路构成。 两个另外的电容器(C3,C4)连接到输出端子(A1,A2)。 它们的其他端子可以通过MOS晶体管(T3)或MOS晶体管(T1,T2)直接连接在一起,以改变振荡器频率。

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