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    Signal generator for a nuclear resonance spectrograph
    21.
    发明授权
    Signal generator for a nuclear resonance spectrograph 失效
    用于核共振光谱的信号发生器

    公开(公告)号：US3588676A

    公开(公告)日：1971-06-28

    申请号：US3588676D

    申请日：1968-09-24

    申请人： SPECTROSPIN AG

    发明人： TSCHOPP WERNER ,  KELLER TONI

    IPC分类号： G01R33/46 ,  G01N27/78

    CPC分类号： G01R33/4616

    摘要： A METHOD AND APPARATUS FOR GENERATING A LINEAR FREQUENCY SWEEP TO OBTAIN HIGH RESOLUTION NUCLEAR MAGNETIC RESONANT SPECTRA IN A NUCLEAR MAGNETIC RESONANT SPECTROGRAPH. THE SIGNAL IS GENERATED BY FEEDING A SIGNAL FS TO A MIXER WHICH RECEIVES A SIGNAL FYZ+E FROM A CONTROLLABLE OSCILLATOR AND FEEDS OUT A SIGNAL K INTO A PHASE DETECTOR. THE PHASE DETECTOR RECEIVES A SIGNAL FROM A POTENTIOMETER VIA A VOLTAGE FREQUENCY CONVERTER, AND FEEDS BACK A SIGNAL THROUGH THE CONTROLLABLE OSCILLATOR VIA AN AMPLIFIER. THE SIGNAL FS+E IS FED INTO A CIRCUIT INCLUDING AT LEAST ONE ADDITIONAL POTENTIOMETER AND VOLTAGE FREQUENCY CONVERTER, AND IS DIVIDED BY A FACTOR GREATER THAN UNITY IN ORDER TO REDUCE THE FREQUCNCY SWEEP. THE DIVIDED SIGNAL IS THEN SHIFTED BY ADDING A SUITABLE CONSTANT SIGNAL FK TO IT, SO AS TO PUT THE OUTPUT SIGNAL INTO THE RANGE WHERE NUCLEAR MAGNETIC RESONANCE IS OBTAINED.

    Bimodal cavity resonator and microwave spectrometers using same
    22.
    发明授权
    Bimodal cavity resonator and microwave spectrometers using same 失效
    双模CAVITY谐振器和使用相同的微波光谱仪

    公开(公告)号：US3559043A

    公开(公告)日：1971-01-26

    申请号：US3559043D

    申请日：1967-07-03

    申请人： VARIAN ASSOCIATES

    发明人： HYDE JAMES S

    IPC分类号： G01R33/60 ,  H01P7/06 ,  G01N27/78

    CPC分类号： H01P7/06 ,  G01R33/60

    摘要： A CENTRAL PORTION OF THE CAVITY IS CAPABLE OF SUPPORTING TWO RESONANT MODES WHILE ADJOINING EACH SECTIONS EACH SUPPORT ONLY ONE OF THE MODES. WAVEGUIDES CONNECTED TO EACH OF THE END SECTIONS COUPLE MICROWAVE ENERGY TO THE CAVITY TO EXCITE THE TWO MODES THEREIN. A SAMPLE OF MATTER IS INSERTED INTO THE CENTRAL PORTION SO AS TO BE IRRADIATED BY BOTH MODES. A TUNING SCREW IN EACH OF THE END SECTIONS PERMITS INDEPENDENTLY TUNING THE CAVITY TO THE RESONDANT FREQUENCY OF ONE OF THE RESONANT MODES. ADJUSTING SCREWS IN THE CENTRAL PORTION OF THE CAVITY STRUCTURE PERMIT ADJUSTMENT OF THE CROSS COUPLING BETWEEN THE TWO MODES. THE MICROWAVE SPECTROMETER DESIGNS TAKE ADVANTAGE OF THE ABILITY OF THE CAVITY TO BE INDEPENDENTLY TUNED TO THE RESONANT FREQUENCIES OF EITHER MODE. THE SEVERAL DESIGNS PROVIDE FOR AMPLITUDE MODULATION OF THE FREQUENCY OF THE PUMPING MODE OR SCANNING OF THE FREQUENCY OF THE PUMPING MODE OR MODULATION OF AN APPLIED UNIDIRECTIONAL MAGNETIC FIELD EITHER WITH OR WITHOUT MODULLATION OF THE FREQUENCY OF THE PUMPING MODE.