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10 条记录 (耗时 0.01 秒)

    TEMPERATURE COMPENSATED OSCILLATOR
    1.
    发明公开
    TEMPERATURE COMPENSATED OSCILLATOR 审中-公开
    温度补偿振荡器

    公开(公告)号：EP1449272A4

    公开(公告)日：2005-11-30

    申请号：EP02771877

    申请日：2002-10-30

    申请人： POSEIDON SCIENT INSTR PTY LTD ,  UNIV WESTERN AUSTRALIA

    发明人： IVANOV EUGENE NIKOLAY ,  TOBAR MICHAEL EDMUND ,  HARTNETT JOHN GIDEON

    IPC分类号： H03B5/04 ,  H03B5/18 ,  H03B21/01 ,  H01P7/06

    CPC分类号： H03B5/1817 ,  H03B5/04 ,  H03B21/01

    摘要： An oscillator having a desired output frequency, comprising a cavity resonator (102) loaded with an anisotropic dielectric material and an oscillator circuit (100) including the cavity resonator (102) as a frequency determining element, the oscillator circuit (100) arranged to operate the cavity resonator (102) at a first frequency in a first mode and at a second frequency in a second mode, the first mode and the second mode each being influenced to a different extent by the thermal coefficient of permittivity of at least one crystal axis of the dielectric material, the oscillator circuit arranged to produce the desired operating frequency from the first frequency and the second frequency. The first frequency and the second frequency differ by an amount corresponding to the desired output frequency.

    REMOTE SENSOR DEVICE
    6.
    发明公开
    REMOTE SENSOR DEVICE 审中-公开
    远程传感器装置

    公开(公告)号：EP2380275A1

    公开(公告)日：2011-10-26

    申请号：EP10702155.2

    申请日：2010-01-18

    申请人： Oxford RF Sensors Ltd

    发明人： GREGG, John, Francis ,  KARENOWSKA, Alexy, Davison

    IPC分类号： H03B5/18 ,  H03K17/95

    CPC分类号： H03B5/1805 ,  H03B5/1817 ,  H03K17/9542

    摘要： A self-oscillating remote sensor device includes a delay-line sensor system having at least one delay-line and at least one sensor element. The device also includes an oscillator control circuitry, and a frequency selection impedance connecting the delay- line sensor system and the oscillator control circuitry and presenting an impedance to the delay-line sensor system. The oscillator control circuitry includes an amplifier, a non¬ linear amplitude control element (N-LACE) such as an active device with a negative differential conductance that provides an output whose amplitude has a negative second derivative with respect to an input signal, and a driver. Such a device permits successful interaction between electrical sensors and controlling (driving) electronics over long distances without the problems normally encountered when a delay-line is presented between an electrical sensor and its driver electronics.

    Dual mode cavity stabilized oscillator
    7.
    发明公开
    Dual mode cavity stabilized oscillator 失效
    振荡器与频率确定双模式谐振腔。

    公开(公告)号：EP0123448A1

    公开(公告)日：1984-10-31

    申请号：EP84302026.4

    申请日：1984-03-27

    申请人： Ford Aerospace & Communications Corporation

    发明人： Fiedziuszko, Slawomir

    IPC分类号： H03B5/18

    CPC分类号： H03B5/1817 ,  H03B5/1823 ,  H03B5/1829 ,  H03B5/1864 ,  H03B2200/0068 ,  H03B2201/014 ,  H03B2201/0208

    摘要： A stable electromagnetic oscillator (30) comprises an amplifying element (3) in feedback association with a dual mode resonant cavity (12) that provides a double pole bandpass filter function. Two orthogonal modes (1 and 2) of electromagnetic energy resonate within the cavity (12). An output fromthe amplifying element (3) excitationally couples into the first mode (1), while the second mode (2) couples into the input of the amplifying element (3). The output (8) of the oscillator (30) is obtained from the first mode (1). Optional injection lock can be used for greater stability by means of coupling a stable a.c. reference (9) into the cavity (12) in alignment with the second mode (2). Optional electronic frequency tuning comprises a phase or frequency comparator (11) and a reference a.c. source (13), producing a d.c. feedback signal fed to varactor diodes (10). Coupling ports (4, 5, 6, 7) of the cavity (12) can be, e.g., irises, capacitive probes, coaxial probes, or any combination thereof. The electrical field associated with each port (4,5,6,7) is aligned with the electrical field of the mode (1 or 2) coupled thereby. A dielectric resonator can be positioned within the cavity (12) to allow for physical shrinking of the cavity (12) while maintaining the electromagnetic characteristics of the cavity (12).