US2964638A - Electronic anticoincidence device - Google Patents

Electronic anticoincidence device Download PDF

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Publication number
US2964638A
US2964638A US784554A US78455459A US2964638A US 2964638 A US2964638 A US 2964638A US 784554 A US784554 A US 784554A US 78455459 A US78455459 A US 78455459A US 2964638 A US2964638 A US 2964638A
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Prior art keywords
signal
potential
electrodes
signals
junction
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Expired - Lifetime
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US784554A
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English (en)
Inventor
Hanlet Jacques Marie Noel
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Societe dElectronique et dAutomatisme SA
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Societe dElectronique et dAutomatisme SA
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/14—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled

Definitions

  • the present invention has for its object a device depending upon the physics of solids, which constitute in themselves, and independently of applications which may be made of them, a detector of temporary anti-coincidences of signals, assuring further, in the event of anti-coincidence, the identification of the signal then present.
  • the invention is characterized essentially in that it is made up of the combination of a pair of identical electroluminescent cells and by a photoconductor having a lateral effect (as defined later) having an axis of symmetry, on each side of which are established electrodes for the taking off of current and respectively projecting the lights of electro-luminescent cells when activated by distinct signals.
  • a photoconductor having lateral effect can be defined as follows, and in a manner per se suificient for the purposes of the invention, referring for greater simplicity to the diagram of annexed Fig. 1, which shows the principle of the invention.
  • Figs. 2 and 3 show two examples of the invention in practical form:
  • this solid body 1 The prolonged lateral faces of this solid body 1 are covered with thin film conductive electrodes 3 and 4, to which are connected outlet terminals T1 and T2 respectively.
  • a resistance of charge R is connected between these outlets, shunted by a current-indicating device I.
  • the two activating lights L and L coexist on the upper face of the solid body 1, the two currents i and 1', develop simultaneously and, naturally, if the conditions of symmetry (mechanical as well as electric) are satisfied, these two currents will have the same value and one will cancel the other in the circuit of resistance R.
  • the definition of the type N and of the type P conductivity as given above should be considered as relative and may be assured by the proper choice of the materials 1 and 2. If, for example, the material 1 is germanium or silicon, the material 2 can consist of indium.
  • FIG. 2 One form of a device according to the invention is shown by way of example only in Fig. 2, conventional details being omitted. Also, in this diagram, the relative dimensions of the elements, especially their thicknesses with relation to other dimensions, are not correctly shown, the thicknesses being exaggerated in order to assure clarity of the drawing. It should be understood that layers of very small thicknesses are involved, the electrodes or armatures being of thin films or skins.
  • This device includes the operative association of two members A and B, supported on opposite faces of a transparent supporting plate 11, formed of glass, for example.
  • the member A is a double electro-lurninescent cell.
  • the member B is made according to Fig. 1, that is, 1 is a plate of germanium or siliciurn crystal, having its edge faces covered with conductive metal for the formation of the electrodes 3 (not shown in Fig. 2) and 4, and in which the electrode 2 has been formed by a diffusion of indium or by a recrystallization of a deposit of indium.
  • the member A is a double electroluminescent cell comprising, for example, a translucent film electrode 12 deposited upon the upper face of glass plate 11, a monocrystalline plate 13 of electroluminescent material producing, when excited, a light which passes through 12 and 11 and excites the material 1 of the member B, and two film electrodes 14 and 15 applied to the upper face of plate 13, these electrodes being of the same surface areas and disposed symmetrically on opposite sides of the median plane of the structure.
  • a connection Z can be provided for junction electrode 2, and connections X and Y are provided for the application of input signals to electrodes 14 and 15 respectively.
  • the electro-luminescent material can, for example, consist of a monocrystalline complex of oxides of zinc and copper, in a relation of zinc to copper greater than 99%.
  • the electrode 12 can consist of a film of oxide of titanium.
  • the electrodes 14 and 15 can be'o-f'silver, aluminum or "even of platinum or rhodium. Otherknow'n materials can, moreover, be "sub- 'stituted for those indicated above, without'thereby going outside the scope of the invention defined by the combination of the members A and Bin the foregoing description. V
  • the input signals are electric, being applied to the terminals X and Y at the time that the terminal Z is held 'at a constant potential, for example that of the earth.
  • the input signals could be luminous, appropriate polarization potentials being then applied between the terminals X-Z and Y-Z and the activation taking place by luminous excitation for each cell, or even each of the connections X and Y might come from a photoconductor element excited by a luminous radiation form ing the input signal.
  • each applied signal should be of alternating character, not necessarily sinusoidal in form, and can be reduced to an impulse of suitably brief duration.
  • the device thus functions as a circuitfor the'indic'ation of anti-coincidence of two input signals of thesame characteristics and, by the polarity of its output, it provides identification of that one of these two signals which exists alone at a given instant.
  • the device can thus advantageously be employed as half-adders and "especially as halfsubtractors of binary numbers, since in thislatter case, it-can furnish directly the numbers retained when the number to be subtracted fromthe other is 1 at the time that the second is O.
  • the device functions as a circuit of conditional transfer, a gate circuit, in that one of the signals is allowed to pass to the output only in the absence of the other. Each signal thus serves to inhibit the other but the'output discriminates between the information signal and the inhibition signal. This is evidently anewfunction in commutation.
  • the device-can also serve for the development of a signal of error in a servo-mechanism, the magnitudes of input and output of which are coded numerically in binary values.
  • a device of the invention can, indirect manner, perform this logical function of reunion also, while establishing simultaneously the above mentioned "signal of disjunction.
  • the photo-voltaic component of the member B comes into play for, as is well understood, this component is not at all inhibited by the lateral photo-conductive effect defined above.
  • the photo-voltaic component will exist as soon as one of the signals appears at X or at Y and will continue when the two signals are present at X and at Y.
  • This component will be of a constant polarity and the provision of the element D even though not required, will be advantageous, for it will avoid action of this photo-voltaic component on the amplitude of the output signals at T and T
  • it will be advantageous to establish the connection beginning with the electrode 2 even if one does not utilize the signal 'at the terminals of R
  • one can render equal to each other the values of the three out-put components, that is to say, the differences in potential at the terminals of the three resistances R R and R It is sufiicient for this purpose that:
  • a device for detecting anti-coincidence of two signals comprising in combination, a pair of electro-luminescent cells arranged to be activated by distinct signals, a photo-conductive elementpositioned so that equal areas thereof on opposite sides of a median plane are controlled by said cells respectively, electrode means extending along the path of said median plane on the oppositefac'e of said photo-conductive element from said cells to 'provide an N-P junction on said photo-conductive element, side electrodes carried by the two side faces of said photoconductive element in symmetrical relation with said junction, indicator means connected between said side electrodes and being responsive to the voltage'difie'rence developed between said electrodes, and a resistance element connected from each side electrode'to a point of fixed potential, said resistance elements having equal re sistance values.
  • a device including indicator means connected between said side electrodes and being responsive to the voltage difierence developed between said electrodes.
  • I v I 3 A device according to claim 1, and including "a ponnection incorporating a resistance and an element 5 having unidirectional conductivity extending from said side electrodes, to the product of its thickness times the junction electrode to a point of fixed potential. ratio of the mobilities of the electrons and the holes in 4.
  • a device in which the values said semi-conductor.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Power Engineering (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Electroluminescent Light Sources (AREA)
US784554A 1958-01-04 1959-01-02 Electronic anticoincidence device Expired - Lifetime US2964638A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1189490T 1958-01-04

Publications (1)

Publication Number Publication Date
US2964638A true US2964638A (en) 1960-12-13

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US784554A Expired - Lifetime US2964638A (en) 1958-01-04 1959-01-02 Electronic anticoincidence device

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US (1) US2964638A (fr)
FR (1) FR1189490A (fr)
GB (1) GB836769A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152258A (en) * 1959-07-24 1964-10-06 Philips Corp Electro-optical switching device
US3231744A (en) * 1960-11-22 1966-01-25 Philips Corp Fast-switching, bistable electro-optical device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641712A (en) * 1951-07-13 1953-06-09 Bell Telephone Labor Inc Photoelectric device
US2863056A (en) * 1954-02-01 1958-12-02 Rca Corp Semiconductor devices

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641712A (en) * 1951-07-13 1953-06-09 Bell Telephone Labor Inc Photoelectric device
US2863056A (en) * 1954-02-01 1958-12-02 Rca Corp Semiconductor devices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152258A (en) * 1959-07-24 1964-10-06 Philips Corp Electro-optical switching device
US3231744A (en) * 1960-11-22 1966-01-25 Philips Corp Fast-switching, bistable electro-optical device

Also Published As

Publication number Publication date
GB836769A (en) 1960-06-09
FR1189490A (fr) 1959-10-02

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