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    Signal correlator with improved dynamic range
    4.
    发明授权
    Signal correlator with improved dynamic range 失效
    信号相关器具有改善的动态范围

    公开(公告)号：US3867620A

    公开(公告)日：1975-02-18

    申请号：US32714573

    申请日：1973-01-26

    Applicant: PRINCETON APPLIED RES CORP

    Inventor： COOR THOMAS

    IPC: G06G7/16 ,  G06G7/161 ,  G06G7/186 ,  G06G7/19

    CPC classification number: G06G7/161 ,  G06G7/1928

    Abstract: Providing an indication of the product of two arbitrary signals utilizing an electronic multiplier whose output signal will include DC drift and offset due to circuit imperfections in said multiplier, wherein prior to multiplying said signals in said multiplier, multiplying one of said signals with a predetermined polarity reversing signal to provide said one signal repetitively reversed in polarity in accordance with the sign of said predetermined polarity reversing signal, multiplying said one signal repetitively reversed in polarity times the other of said signals in said multiplier to provide the product of said signals in the form of a predetermined product signal repetitively polarity reversed in accordance with the sign of said predetermined polarity reversing signal, the output signal from said multiplier comprised of said predetermined product signal and said DC drift and offset and wherein the peak-to-peak amplitude of said predetermined product signal is proportional substantially only to the actual product of said signals and is substantially independent of said DC drift and offset; filtering said predetermined product signal out of said output signal; and synchronously rectifying said product signal in synchronism with said predetermined polarity reversing signal to provide a DC signal which is said indication of the product of said two arbitrary signals.

    Abstract translation: 使用电子倍增器提供两个任意信号的乘积的指示，该电子乘法器的输出信号将由于所述乘法器中的电路缺陷而包括DC漂移和偏移，其中在乘法器之前的所述信号乘以预定极性的所述信号之一 将所述一个信号根据所述预定极性反转信号的符号提供反向极性反转的信号，将所述一个信号乘以所述乘数中所述信号中的另一个重复地反转以提供所述信号的乘积 根据所述预定极性反转信号的符号反复极性的预定乘积信号，来自所述乘法器的输出信号由所述预定乘积信号和所述DC漂移和偏移组成，并且其中所述预定的 产品信号是比例尺 仅相对于所述信号的实际乘积，并且基本上与所述DC漂移和偏移无关; 从所述输出信号中滤出所述预定乘积信号; 以及与所述预定极性反转信号同步地同步整流所述产品信号，以提供作为所述两个任意信号的乘积的所述指示的DC信号。

    Apparatus for slit illumination
    5.
    发明授权
    Apparatus for slit illumination 失效
    装置照明灯具

    公开(公告)号：US3554649A

    公开(公告)日：1971-01-12

    申请号：US3554649D

    申请日：1968-10-28

    Applicant: PRINCETON APPLIED RES CORP

    Inventor： RIDGWAY STUART L

    IPC: G01J3/04 ,  G01J3/10 ,  G01J3/18

    CPC classification number: G01J3/18 ,  G01J3/0208 ,  G01J3/024 ,  G01J3/04 ,  G01J3/10

    Abstract: APPARATUS FOR ILLUMINATING A SLIT IS PROVIDED WHEREIN MULTI-WAVELENGTH RADIATION IS CAUSED TO IMPINGE SEQUENTIALLY ON A PLURALITY OF INPUT MEANS. THE MULTI-WAVELENGTH RADIATION EMANATING THEREFROM IS DIFFRACTED AND SELECTED WAVELENGTH COMPONENTS OF THE MULTI-WAVELENGTH RADIATION EMANATING FROM EACH INPUT MEANS IS CAUSED TO IMPING ON A SIGNLE EXIT SLIT. THIS SELECTED WAVELENGTH COMPONENT IMPINGING ON THE EXIT SLIT FROM EACH INPUT MEANS BEING DIFFERENT AND THE SEQUENTIAL ILLUMINTION OF SUCH EXIT SLIT WITH RADIATION FROM EACH OF SUCH INPUT MEANS CAUSING THE VARIOUS SELECTED WAVELENGTH COMPONENTS FROM EACH INPUT MEANS TO BE PRESENTED TO THE EXIT SLIT IN A TIME MULTIPLEX SEQUENCE.

    Rotating capacitor square wave filter and applications thereof
    7.
    发明授权
    Rotating capacitor square wave filter and applications thereof 失效
    旋转电容器方波滤波器及其应用

    公开(公告)号：US3793599A

    公开(公告)日：1974-02-19

    申请号：US3793599D

    申请日：1973-01-26

    Applicant: PRINCETON APPLIED RES CORP

    Inventor： COOR T

    IPC: H03H19/00 ,  H03H7/10 ,  G01R19/02 ,  G01R19/18

    CPC classification number: H03H19/002

    Abstract: Filtering a zero median value square wave signal having predetermined transitions out of a composite signal including said square wave signal and other signals, including applying said composite signal to the input of a rotating capacitor square wave signal filter including a rotating capacitor C connected between terminals T1 and T2 and an electrically associated resistor R, and repetitively reversing the connection of the capacitor C to the terminals T1 and T2 in synchronism with the transitions of the square wave signal whereby, upon the RC time constant of the resistor R and the capacitor C being much greater than the period of the square wave signal, substantially only the square wave signal is across the output of the rotating capacitor square wave signal filter; and applications thereof.

    Abstract translation: 从包括所述方波信号的复合信号和其他信号中滤出具有预定转换的零中值方波信号，包括将所述复合信号施加到旋转电容器方波信号滤波器的输入端，所述旋转电容器方波信号滤波器包括连接在端子T1 和T2和电相关的电阻器R，并且与方波信号的转变同步地重复地将电容器C连接到端子T1和T2，由此，当电阻器R和电容器C的RC时间常数为 远远大于方波信号的周期，基本上只有方波信号跨过旋转电容器方波信号滤波器的输出; 及其应用。

    Electron impact spectrometer of high sensitivity and large helium tolerance and process of characterizing gaseous atoms and molecules by the energy loss spectrum
    9.
    发明授权
    Electron impact spectrometer of high sensitivity and large helium tolerance and process of characterizing gaseous atoms and molecules by the energy loss spectrum 失效

    公开(公告)号：US3836775A

    公开(公告)日：1974-09-17

    申请号：US33954473

    申请日：1973-03-08

    Applicant: PRINCETON APPLIED RES CORP

    Inventor： RIDGWAY S

    IPC: G01Q30/02 ,  H01J49/04 ,  H01J49/14 ,  H01J49/48 ,  G01N23/02

    CPC classification number: H01J49/147 ,  H01J49/488

    Abstract: Process of and apparatus for measuring the energy loss of electrons in collisions with gaseous material, e.g., gaseous sample atoms and molecules for the purpose of characterizing (identifying, discriminating between or determining the molecular structure of) the atoms or molecules by the electron energy loss spectrum are provided. A current of low energy electrons is introduced into a region defined by being enclosed in a fine wire grid. The sample atoms or molecules are also in this region. The sample may or may not be diluted with helium gas. Electrons that have collided with the sample or with helium attempt to diffuse from this region out toward a collector electrode whose potential may be varied during the course of obtaining a spectrum. In general, if the kinetic energy of an electron is sufficient for it to surmount the potential hill (in the gravitational plot sense) or electrostatic potential between the collector and the grid, it will eventually be absorbed by the collector, since the area of the collector is purposely made enormously greater than that of the grid. If the kinetic energy of the electron is insufficient to reach the collector, i.e., is insufficient to surmount the potential hill or electrostatic potential between the potential of the grid and the potential of the collector, the electron is eventually absorbed on the grid. Thus the current to the grid is made up of those electrons that have lost sufficient kinetic energy in collisions with the sample a atoms or molecules that they cannot surmount the electrostatic potential between the grid and collector and reach the collector. The measure of this current as a function of the collector potential, e.g., the derivative of the current to the grid with respect to the collector potential, provides a spectrum of energy loss of the electrons particularly useful in characterizing, i.e., identifying, discriminating between, or determining the molecular structure, of the sample gaseous atoms or molecules.

    Active electrical filter
    10.
    发明授权
    Active electrical filter 失效
    主动电动过滤器

    公开(公告)号：US3715678A

    公开(公告)日：1973-02-06

    申请号：US3715678D

    申请日：1971-07-27

    Applicant: PRINCETON APPLIED RES CORP

    Inventor： REICHARD H

    IPC: H03H11/12 ,  H03F1/36

    CPC classification number: H03H11/1252

    Abstract: An active electrical filter having an input, output and circuit common, and providing Q variation without affecting on-resonance gain, and including amplifier means including an inverting input and having a complex gain function G(S) which equals K (ST/((ST)2+ 1)); and combining means including a single variable element for combining the filter input and output and for applying the resultant thereof to the inverting input of said amplifier means, adjustment of said variable element providing said Q variation without affecting on-resonance gain of said filter.

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