公开(公告)号：US3714553A

公开(公告)日：1973-01-30

申请号：US3714553D

申请日：1971-03-10

申请人： SPECTROSPIN AG

发明人： KELLER T

IPC分类号： G01R33/389 ,  H01F7/20 ,  G01N27/78

CPC分类号： G01R33/389 ,  H01F7/202

摘要： In a magnetic nuclear resonance spectrum analyzer including a pair of pole pieces for producing a magnetic field and coils disposed around the pole pieces and supplied with current from a device which effects a coarse stabilization of the magnetic field between the pole pieces, a pair of broadband coils having no iron in their cores disposed in the air gap between the pole pieces iron in their cores disposed in the air gap between the pole pieces and connected to receive a high frequency component of the output of a nuclear resonance stabilizer for effecting a fine stabilization of the magnetic field.

摘要翻译： 在包括用于产生磁场的一对极片和设置在极片周围的线圈的磁核共振频谱分析仪中，并且从实施磁极之间的磁场粗略稳定的装置提供电流的一对宽带 线圈中没有铁的线圈设置在设置在极靴之间的气隙中的芯中的铁芯之间的空气间隙中，并且连接以接收核共振稳定器的输出的高频分量，以实现精细稳定 的磁场。

公开(公告)号：US3534252A

公开(公告)日：1970-10-13

申请号：US3534252D

申请日：1968-09-16

申请人： SPECTROSPIN AG

发明人： LAUKIEN GUNTHER

IPC分类号： G01R33/46 ,  G01N27/78

CPC分类号： G01R33/46

公开(公告)号：US3720816A

公开(公告)日：1973-03-13

申请号：US3720816D

申请日：1970-11-06

申请人： SPECTROSPIN AG

发明人： KELLER T ,  LAUKIEN G ,  TSCHOPP W

IPC分类号： G01R33/36 ,  G01R33/46 ,  G06F15/34 ,  G06G7/19

CPC分类号： G01R33/46 ,  G01R33/3607 ,  G01R33/4625

摘要： Interference signals such as those obtained in nuclear spin spectrometry are subjected to a Fourier analysis in which the frequencies and amplitudes of the interference signals are determined mathematically. The excitation of the sample produces interference signals, all the oscillations of a definite frequency band are filtered out, and the Fourier analysis is performed on this frequency band. The selected portion of the interference oscillations is varied by varying the frequency band and the center frequency thereof in reference to the frequency content of the whole interference signal. One frequency may be produced in a fundamental oscillator and various frequencies, for example for use in mixing circuits, are obtained by frequency multiplication and division.

摘要翻译： 对在核自旋光谱法中获得的干扰信号进行傅里叶分析，其中干涉信号的频率和振幅在数学上确定。 样本的激发产生干扰信号，滤波出一定频带的所有振荡，并对该频带进行傅立叶分析。 通过参照整个干扰信号的频率内容改变频带及其中心频率来改变所选择的干扰振荡部分。 可以在基本振荡器中产生一个频率，并且通过倍频和除法获得例如用于混合电路的各种频率。

公开(公告)号：US3435333A

公开(公告)日：1969-03-25

申请号：US3435333D

申请日：1965-08-04

申请人： SPECTROSPIN AG

发明人： WEGMANN LIENHARD ,  GALLO MARIO

IPC分类号： G01R33/24 ,  G01R33/38 ,  G01R33/389 ,  G01R33/46 ,  G01N27/78

CPC分类号： G01R33/381 ,  G01R33/24 ,  G01R33/389 ,  G01R33/46

公开(公告)号：US3909705A

公开(公告)日：1975-09-30

申请号：US38365773

申请日：1973-07-30

申请人： MESSRS SPECTROSPIN AG

发明人： TSCHOPP WERNER

IPC分类号： H03C3/00 ,  G01R33/32 ,  G01R33/36 ,  G01R33/46 ,  G01R33/08

CPC分类号： G01R33/4616 ,  G01R33/3607

摘要： For recording spin resonance spectra the spins of a specimen located in a magnetic field are excited with a pulse-modulated radio-frequency signal (excitation signal). The signal furnished by the excited spins (received signal) in the pulse intervals of the excitation signal is pulse-modulated in such a manner that it is suppressed at least for the duration of the pulses of said excitation signal and that its phase changes by 180* from pulse to pulse. In this way the energy of the receiving signal is distributed to fewer frequency components and a substantial improvement of the signal-to-noise ratio is achieved. A device for performing the method comprises a radio-frequency generator for generating the carrier frequency, a pulse generator for generating a first pulse train with a predetermined pulse repetition frequency as modulation frequency, a first modulator furnishing a pulse- modulated radio-frequency signal coupled to said radio-frequency generator and said pulse generator, a specimen holder coupled to said modulator and located in a magnetic field, and a superheterodyne receiver coupled to said specimen holder, which superheterodyne receiver contains a modulating device to which a second pulse train, whose pulses fall into the intervals between the pulses of said first pulse train and have an alternating polarity, is applied by said pulse generator to modulate the signal received from said specimen holder.

摘要翻译： 为了记录自旋共振谱，位于磁场中的样品的自旋被脉冲调制的射频信号（激发信号）激发。 在激励信号的脉冲间隔中由激发自旋（接收信号）提供的信号以这样的方式进行脉冲调制，使得其至少在所述激励信号的脉冲的持续时间内被抑制，并且其相位改变180° DEG从脉冲到脉冲。 以这种方式，接收信号的能量被分配到较少的频率分量，并且实现了信噪比的显着改善。 一种用于执行该方法的装置，包括用于产生载波频率的射频发生器，用于产生具有预定脉冲重复频率作为调制频率的第一脉冲序列的脉冲发生器，第一调制器，提供脉冲调制的射频信号 所述射频发生器和所述脉冲发生器，耦合到所述调制器并位于磁场中的样本保持器和耦合到所述检体保持器的超外差接收器，所述超外差接收器包含调制装置，第二脉冲序列 脉冲落入所述第一脉冲串的脉冲之间的间隔并且具有交替极性，由所述脉冲发生器施加以调制从所述样本保持器接收的信号。

公开(公告)号：US3812418A

公开(公告)日：1974-05-21

申请号：US16214171

申请日：1971-07-13

申请人： SPECTROSPIN AG

发明人： TSCHOPP W

IPC分类号： G01R33/44 ,  G01R33/46 ,  G01N27/78

CPC分类号： G01R33/4616 ,  G01R33/44

摘要： In the excitation of spin resonances by means of an RF-pulse in a sample arranged in a homogeneous magnetic field for purposes of spin resonance spectrometry, a limitation of the energy of excitation to the frequency range of interest and an essentially constant amplitude of the energy of excitation in that range of frequency is achieved by application of an RF-pulse with an amplitude variable in time which, at least approximately, corresponds to a sine x/x function. Such amplitude function can be generated by a modulation unit which is controlled either by a digital computer with a stored amplitude function or by the output signal of an analog computer solving a suitable differential equation.

公开(公告)号：US3795856A

公开(公告)日：1974-03-05

申请号：US3795856D

申请日：1972-05-19

申请人： SPECTROSPIN AG

发明人： KELLER T

IPC分类号： G01R33/36 ,  G01R33/38 ,  G01R33/46 ,  G01N27/78

CPC分类号： G01R33/46 ,  G01R33/3607

摘要： A method and apparatus are described for performing time shared spin resonance analyses. A sideband of a pulse modulated RF signal is used to excite the spins of a sample, and the signals received from the excited spins are heterodyned with the carrier frequency of the pulse modulated RF signal. The heterodyned signal is detected by mixing it with a signal having a frequency equal to the product of the pulse repetition rate and the ordinal number of the sideband used to excite the spins. The frequency of the sideband used to excite the spins of the sample is swept through a range of frequencies simply by varying the pulse repetition rate. During such variations in the pulse repetition rate, the amplitude of the sideband signal is kept constant by varying the pulse duration or the amplitude of the carrier frequency signal. Apparatus for carrying out the method is described.

摘要翻译： 描述了用于执行时间共享自旋谐振分析的方法和装置。 脉冲调制RF信号的边带用于激发采样的自旋，并且从被激励的自旋接收的信号与脉冲调制的RF信号的载波频率进行外差。 通过将外频信号与频率等于用于激励自旋的边带的脉冲重复率和序数的乘积的信号混合来检测外差信号。 用于激发样品的自旋的边带的频率简单地通过改变脉冲重复率而扫过频率范围。 在脉冲重复率的这种变化期间，边带信号的幅度通过改变载波频率信号的脉冲持续时间或振幅而保持恒定。 描述用于执行该方法的装置。

公开(公告)号：US3787760A

公开(公告)日：1974-01-22

申请号：US3787760D

申请日：1972-06-02

申请人： SPECTROSPIN AG

发明人： KELLER T ,  TSCHOPP W

IPC分类号： G01N24/00 ,  G01R33/46 ,  G01N27/78

CPC分类号： G01N24/00 ,  G01R33/4616

摘要： A method and apparatus are described for performing pulsed double resonance analyses such as selective saturation and homonuclear decoupling. The method comprises exciting the spins of a spin system in a sample with a series of RF pulses, exciting selected spins of the spin system with an RF signal having frequency components at approximately the Larmor (or resonance) frequencies of the selected spins, receiving the resultant free precession decay signals (or interferograms) of the resonant frequencies generated by the excitations, averaging a plurality of the free precession decay signals, and Fourier analyzing the mean value of the free precession decay signals to determine the spectral response. The excited spin system may be the set of spins associated with one type of nuclei in a sample. Apparatus for carrying out the method includes an RF generator and RF gate for producing a series of RF pulses to excite all the spins of the spin system, and at least one additional RF generator and RF gate for producing an RF oscillation to selectively excite only certain spins of the spin system.

摘要翻译： 描述了用于执行脉冲双共振分析的方法和装置，例如选择饱和和同核解耦。 该方法包括利用一系列RF脉冲激发样品中的自旋系统的自旋，利用RF信号激励所述自旋系统的选定旋转，所述RF信号的频率分量大约为所选自旋的拉莫尔（或共振）频率，接收 由兴奋产生的谐振频率产生的自由进动衰减信号（或干涉图），对多个自由进动衰减信号进行平均，并傅里叶分析自由进动衰减信号的平均值以确定光谱响应。 激发的自旋系统可以是与样品中的一种类型的核相关的一组旋转。 用于执行该方法的装置包括用于产生一系列RF脉冲以激发自旋系统的所有自旋的RF发生器和RF门，以及用于产生RF振荡的至少一个附加RF发生器和RF门，以选择性地激发仅一定的 旋转系统的旋转。

公开(公告)号：US3781650A

公开(公告)日：1973-12-25

申请号：US3781650D

申请日：1972-05-09

申请人： SPECTROSPIN AG

发明人： KELLER T

IPC分类号： G01R33/46 ,  G01N27/00

CPC分类号： G01R33/4625

摘要： A method and apparatus are described for reducing interference in the receiver of a spin resonance spectrometer. The apparatus generates a first set of RF excitation pulses of one phase angle and a second set of RF pulses having a phase angle that is 180* different. The interferograms formed by one set of these pulses are then subtracted from those formed by the other in a signal averager.

公开(公告)号：US3769554A

公开(公告)日：1973-10-30

申请号：US3769554D

申请日：1972-06-02

申请人： SPECTROSPIN AG

发明人： KELLER T ,  TSCHOPP W

IPC分类号： G01R33/389 ,  G05F7/00

CPC分类号： G05F7/00 ,  G01R33/389

摘要： Apparatus is described for varying the strength of a stabilized magnetic field by connecting to an integrating amplifier in a field-stabilizing feedback loop a pulse generator that produces current pulses of selectable polarity. The amplifier may be an operational amplifier. For improved signal-to-noise ratios, the output of the pulse generator may be applied to the amplifier through a pair of parallel-connected, oppositely-poled diodes having a threshold voltage high enough to eliminate noise signals.

摘要翻译： 描述了用于通过连接到场稳定反馈回路中的积分放大器来改变稳定磁场的强度的装置，脉冲发生器产生可选极性的电流脉冲。 放大器可以是运算放大器。 为了提高信噪比，脉冲发生器的输出可以通过一对并联连接的相对极化的二极管施加到放大器，该二极管的阈值电压足够高以消除噪声信号。