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    • 5. 发明申请
    • LOW NOISE OSCILLATORS AND TRACKING FILTERS
    • 低噪声振荡器和跟踪滤波器
    • WO1994029947A1
    • 1994-12-22
    • PCT/CA1994000237
    • 1994-05-04
    • NORTHERN TELECOM LIMITED
    • NORTHERN TELECOM LIMITEDBROWN, Anthony, Kevin, Dale
    • H03B05/20
    • H03H11/42H03B5/20H03G1/0023
    • A gyrator based resonator comprises first and second differential amplifiers cross coupled to form a quadrature phase voltage controlled oscillator. The differential amplifier circuits include matched transistor pairs and associated transconductance adjusting components to control the resonant frequency of the resonator. Transconductance delay and admittance loss elements are also provided and these elements serve to control the loop gain of the resonator. A loop gain greater than unity results in the resonator oscillating while a loop gain less than unity produces a bandpass filter. A resonator having gain less than unity may be slaved to a similar resonator having gain adjusted to be greater than unity thus creating a low noise oscillator and tracking filter.
    • 基于回转器的谐振器包括交叉耦合以形成正交相压控振荡器的第一和第二差分放大器。 差分放大器电路包括匹配的晶体管对和相关联的跨导调整组件以控制谐振器的谐振频率。 还提供了跨导延迟和导纳损耗元件,并且这些元件用于控制谐振器的环路增益。 大于单位的环路增益导致谐振器振荡,而环路增益小于单位产生带通滤波器。 具有小于1的增益的谐振器可以被从属于具有被调整为大于1的增益的类似谐振器,从而产生低噪声振荡器和跟踪滤波器。
    • 8. 发明申请
    • DIFFERENTIAL RING OSCILLATOR STAGE
    • 差异振荡器振荡器阶段
    • WO2003017486A1
    • 2003-02-27
    • PCT/IB2002/002960
    • 2002-07-09
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.
    • SANDULEANU, Mihai, A., T.
    • H03K3/0231
    • H03L7/087H03B5/20H03K3/012H03K3/0322H03K5/133H03K2005/00156H03K2005/00189H03K2005/00208H03L7/07H03L7/0995H03L7/10H03L2207/06
    • The present invention relates to a differential ring oscillator stage, comprisingdifferential delay means (Q1, Q2) having a first input (IN+) and an inverse second input (IN-) and a first output and an inverse second output, a first output buffer means (34a) having its input connected to the first output of said delay means (Q1, Q2), and a second output buffer means (34b) having its input connected to the second output of said delay means (Q1, Q2), and further comprising a first controllable current source means (M6) which is connected to the output (OUT+) of said first output buffer means (34a) and controlled in accordance with the signal from said second output of said delay means (Q1, Q2), and a second controllable current source means (M5) which is connected to the output (OUT-) of said second output buffer means (34b) and controlled in accordance with the signal from said first output of said delay means (Q1, Q2), said controllable current source means (M5, M6) supplying currents to the outputs (OUT+, OUT-) of said output buffer means (34a, 34b) such that within the working range the wave form of the currents is essentially proportional to the wave form of the signals from the outputs of said delay means (Q1, Q2).
    • 本发明涉及一种差分环形振荡器级,包括具有第一输入(IN +)和反向第二输入(IN-)以及第一输出和反向第二输出的差分延迟装置(Q1,Q2),第一输出缓冲装置 (34a),其输入连接到所述延迟装置(Q1,Q2)的第一输出端,​​以及第二输出缓冲装置(34b),其输入端连接到所述延迟装置(Q1,Q2)的第二输出端,并且进一步 包括第一可控电流源装置(M6),其连接到所述第一输出缓冲装置(34a)的输出端(OUT +)并根据来自所述延迟装置(Q1,Q2)的所述第二输出端的信号进行控制;以及 第二可控电流源装置(M5),其连接到所述第二输出缓冲器装置(34b)的输出端(OUT-)并根据来自所述延迟装置(Q1,Q2)的所述第一输出端的信号进行控制,所述第二可控电流源装置 提供电流的可控电流源装置(M5,M6) 到所述输出缓冲器装置(34a,34b)的输出(OUT +,OUT-),使得在工作范围内,电流的波形基本上与来自所述延迟装置(Q1)的输出的信号的波形成比例 ,Q2)。