Showing papers by "Sony Broadcast & Professional Research Laboratories published in 1969"

Field effect transistor

Abstract: An insulated gate field effect transistor having a narrow channel made by double diffusion. The double-diffused MIS transistor has a buried layer of high impurity concentration beneath the channel region except the portions of the drain contact region or drain electrode. The buried layer of high impurity concentration is of the same impurity as that of the channel region and is so located that the channel-spreading resistance is drastically reduced while the capacitance between the drain and the channel is maintained as small as possible.

Magnetic recording and reproducing device for color video signals

Abstract: A magnetic-recording device for video signals has means for discriminating between a composite color video signal and a monochrome video signal and means for driving an oscillator which generates a pilot signal of a chrominance signal only when a composite color video signal is being recorded so that no pilot signal is recorded to interfere with the reproduction of a monochrome video signal.

Displacement measuring instrument

Abstract: A displacement measuring instrument comprising displacement transducer means for generating a phase-modulated signal corresponding to displacement, means for supplying a carrier signal to the transducer means, means for producing a pulse width modulation signal of a width corresponding to a phase difference between the phase-modulated signal and the carrier signal, means for generating a signal of a frequency n times that of the carrier signal, n being an integer, and means for producing an interpolation signal corresponding to a phase difference between the signal of the frequency n times that of the carrier signal and the pulse width modulation signal.

An integrated complementary transistor circuit chip with polycrystalline contact to buried collector regions

Abstract: An integrated semiconductor device having a monocrystalline semiconductor substrate of one conductivity type, a diffused layer in the substrate of the opposite conductivity type, a vapor deposited layer formed on the substrate, the vapor deposited layer including a monocrystalline region, and a polycrystalline region of high-impurity concentration surrounding the monocrystalline region and extending from the diffused layer to the surface of the vapor deposited layer, a second monocrystalline region surrounding the polycrystalline region, and monocrystalline regions of high-impurity concentration contiguous to both sides of the polycrystalline region, the monocrystalline regions of high-impurity concentration having the same conductivity type as that of the polycrystalline region and forming a PN junction with the adjoining monocrystalline region.

Magnetic recording and/or reproducing system

Abstract: In a magnetic recording and/or reproducing system, for example, a video tape recorder of the type in which, during recording or reproducing, the magnetic tape is wrapped about a guide drum to a predetermined angular extent and is longitudinally advanced while a rotated magnetic head traverses the tape in skew or oblique tracks thereacross, a device is provided for automatically wrapping the tape about the guide drum at the initiation of the recording or reproducing operation. Such device for wrapping the tape about the guide drum is controlled to avoid its repeated operation in the event of successive recording or reproducing operations. Further, in the event of rewinding of the tape, or opening of a cover or lid provided for the tape recorder, the device automatically unwraps the tape from about the guide drum.

4f–5dExcitation Energy of Tb3+ in Solids

Abstract: Excitation spectra of the 5D4 → 7F emission of Tb3+ were measured in Sc(or In) BO3, and Y (or Gd) BO3, Y3Ga5O12, Sc (or Y) PO4, and Sc2 (or Y2) O3 at room temperature. The 4f–5d excitation band is discriminated from the host lattice excitation band by inspecting the concentration dependences of the excitation spectra. The energy and the shape of the 4f–5d excitation band are almost the same in the lattices with the same structure. The band splittings are related to the symmetry of the crystalline field acting on Tb3+. The 4f–5d excitation band is extremely enhanced by lowering temperature to 77°K.

Convergence means for a plural beam color picture tube

Abstract: In a color cathode-ray tube of the plural-beam type wherein the beams originate on a horizontal or vertical straight line and are directed into fields produced by a horizontal-vertical electromagnetic deflection yoke at predetermined incident angles to each other so as to converge at a color screen, magnetic shielding means, for example, secured to electron beam convergence plates, are disposed for selectively shielding at least one of the beams from the leakage flux produced by the horizontal-vertical electromagnetic deflection yoke in deflecting the beams in the direction of the line of origination thereof, whereby such leakage flux acts selectively on only the unshielded beam or beams for correcting a deviation between the positions of rasters on the color screen produced by the plural beams.

Method for the preparation of groups iii{14 v single crystal semiconductors

Abstract: Method of making an intermetallic compound semiconductor composed of two elements, one of which is a group III metal which has a relatively low vapor pressure at the melting point of the desired intermetallic compound, and the other is a Group V element which has a relatively high vapor pressure at the same temperature which involves establishing a temperature differential along a confined fused mass of the first element and exposing the higher temperature surface of the mass to vapors of the high vapor pressure element, thereby simultaneously forming and growing at least a single crystal of the intermetallic compound at a lower temperature portion of the confined zone.

Speed control system with comparison of a sawtooth wave with a reference level

Abstract: A speed control system comprising means for producing a sawtooth wave signal of a frequency corresponding to a frequency-modulated signal relating to the revolution of a rotary member, means for controlling the revolving speed of the rotary member with the sawtooth wave signal and a circuit for changing the inclination of the sawtooth wave.

Cooling device for mercury-arc lamp or the like

Abstract: A cooling device for a mercury-arc lamp having a housing, an inlet nozzle for introducing cooling water into the housing, a mercury-arc lamp, an exhaust port for discharging the cooling water from the housing, a conduit communicating with the exhaust port and containing the lamp, and a transparent window for directing light of the lamp to the outside. The inlet nozzle jets the cooling water in the vicinity of the window.

Method of making polypropylene electrets

Abstract: An electret which comprises a polypropylene film having a high volume resistivity and having been permanently electrically polarized.

Mössbauer Effect of Fe 57 in CrO 2

Abstract: Samples of CrO 2 containing a small quantity of Fe 57 were prepared and the Mossbauer effect was measured at various temperatures. It was found that Fe atoms were dissolved in CrO 2 taking the electronic state of trivalent ion. The temperature dependence of the internal magnetic field at Fe was analyzed with using a simple molecular field approximation and the coupling between Fe and Cr was discussed. The spin direction of Fe was determined to be antiparallel to the magnetization of CrO 2 matrix by the Mossbauer measurement in an external magnetic field (45 kOe).

Color purity temperature compensation system for a color picture tube

Abstract: In a color picture tube having an apertured beam selecting grill or mask through which one or more electron beams are made to land on predetermined color phosphors applied to the face plate of the tube, thermal expansion of the grill or mask is compensated for, so as to avoid mislanding of the beam or beams, by providing an auxiliary magnetic deflection means in back of the main magnetic deflection or scanning means and operative in dependence on the operation of the main deflection means to produce magnetic flux in opposition thereto and including a core having a magnetic permeability that decreases with increasing temperature so as to similarly decrease the magnetic flux opposing that of the main deflection means, whereby the effective center of deflection of the beam or beams is shifted rearwardly in response to increasing temperature.

Color video signal generating apparatus

Abstract: In a color video signal generating apparatus in which an image of the object to be televised is projected through a color filter onto the photoelectric conversion layer of an image pickup tube and is divided into color component stripes which are successively scanned so that the respective light intensities of the stripes appear as corresponding successive color component signals in the electrical output of the tube, there are also formed on the photoelectric conversion layer two sets of bright and dark stripes having respective spatial frequencies that are different from each other and also each different from the spatial frequency of the color component stripes on such layer so as to provide respective index signals in the tube output, a beat signal is derived from the tube output with a frequency that is the difference between the frequencies of the respective index signals, and such beat signal, which may be frequency multiplied to correspond to the frequency of the color component signals, is employed as a reference for separating the color component signals from each other in the tube output.

Loop antenna with spaced impedance elements

Abstract: A directional antenna comprises a pair of semi-circular antenna members arranged to form a loop, each of the antenna members includes arcuate upper and lower wire-like conductive elements which are at a small distance from each other, at the middle of the respective antenna member, and at a relatively large distance from each other at the ends of the antenna member, and interconnecting elements are connected to the upper and lower conductive elements at the ends of each antenna member, and are preferably integral wire-like extensions of the upper and lower elements. Output terminals are connected to one of the antenna members at the narrow portion thereof, and an impedance acting as a dummy load is connected to the narrow portion of the other antenna member. The interconnecting elements at the adjacent ends of the antenna members being held in opposing spaced relation to form impedances therebetween for determining the distribution of current flow in the directional antenna.

Recording and/or reproducing apparatus

Abstract: A recording and/or reproducing apparatus includes a lever that selectively rotates in relation to a rotor, and further includes a pair of driving lever means which control reel driving means and which produces back tension on the tape. A working lever connects the rotating lever and the driving lever, and back tension is produced on one of the reel-supporting means when the other reel-supporting means is rotated.

Semiconductor device including a polycrystalline diode

Abstract: A semiconductor device consisting of a single crystal region, a polycrystalline region integrally formed on the single crystal region and a PN junction formed in the polycrystalline region.

Magnetic recording and/or reproducing device with tape engagement means which moves in a concentric path with the head

Abstract: A magnetic recording and/or reproducing apparatus having a guide drum and at least one rotary magnetic head associated therewith is provided with a device for automatically drawing a magnetic tape from a cassette and wrapping the tape about the guide drum for scanning by the rotary head. Such device includes at least one tape engaging means for engaging the tape in the cassette or cartridge when the apparatus is in an inactive condition and being moved in an arcuate and substantially concentric path about at least a portion of the periphery of the guide drum for wrapping the tape on the latter.

Ferrite magnetic head with gap spacer of silicon oxide and metal oxides

Abstract: A magnetic head has a gap spacer between magnetic core members thereof, which spacer is constituted by at least one layer of a nonmagnetic metal oxide formed over a protective layer, such as, silica dioxide, on a gap-defining surface of the magnetic core members. The metal oxide layer is formed over the protective layer by heating on the latter an acid solution of a nonmagnetic metal halide or a solution of an organic metal salt, during which heating the protective layer prevents oxidation and etching of the underlying gap-defining surface.

Signal supplying circuit for a color picture tube

Abstract: In a signal supplying circuit for a color picture tube, the luminance signal component of a color signal is divided into a high-frequency component and a low-frequency component, the low-frequency component is supplied to a demodulator for the chrominance signal component of the color signal so that the output of the demodulator which is supplied to the output amplifier contains the demodulated chrominance signal component mixed with the low-frequency luminance signal component, and the high-frequency luminance signal component is separately applied to an input of the amplifier for mixing in the output of the latter with the chrominance signal component and the low-frequency luminance signal component so as to constitute therewith a complete color video signal for application to a color picture tube.

Mercury-arc lamp

Abstract: A mercury-arc lamp formed of a generally cylindrical-shaped tube with electrodes mounted at either end thereof and comprising a line source of light when illuminated from the central portion of the tube between the electrodes and with the tube enlarged adjacent the electrodes so as to reduce devitrification of the tube and provide a long-life mercury-arc lamp.

Degaussing device for color picture tube having parallel-slitted beam-selecting grid

Abstract: A degaussing structure for a video tube which serves to demagnetize the tube and an apertured beam-selecting member in the tube. A shroud surrounds the forward portion of the tube and the apertured beam-selecting member. A pair of degaussing coils which are connected in series are wrapped around cutout areas in the shroud at the top and bottom thereof such that the magnetic flux produced by the current carrying coils is in a direction to degauss the apertured beam-selecting member.

Magnetic recording and reproducing device

Abstract: An auto-reverse type magnetic recording and reproducing device for Philips type cassettes which has means for detecting faultyerasure-preventing means provided in the cassettes so as to avoid faulty erasure of recorded signals on the tape during recording not only in a forward direction but also in a reverse direction.

Method of making connecting parts of semiconductor devices or the like

Abstract: A SEMICONDUCTOR DEVICE HAVING OHMIC CONTACTS APPLIED TO A SEMICONDUCTOR WAFER THROUGH WINDOWS IN A GLASS OR OTHER INSULATING LAYER ON A SURFACE OF THE WAFER IS PROVIDED WITH METAL BUMPS OR PROTUBERANCES FOR CONNECTING THE CONTACTS WITH CORRESPONDING CONDUCTORS OF A HEADER OR PRINTED CIRCUIT BY COVERING THE ENTIRE WAFER SURFACE WITH A LAYER OF TIN OR OTHER METAL HAVING NO AFINITY FOR THE INSULATING LAYER AND STRONG AFFINITY FOR THE CONTACTS, SELECTIVELY DEPOSITING ON REGIONS OF THE TIN LAYER WHICH CORRESPOND TO AT LEAST PORTIONS OF THE CONTACTS METAL, SUCH AS LEAD OR AN ALLOY THEREOF, FOR FORMING THE DESIRED PROTUBERANCES OR BUMPS AND FOR WHICH THE TIN LAYER HAS A STRONG AFFINITY, AND THEN HEATING THE RESULTING STRUCTURE SO THAT THE TIN LAYER IS AGGREGATED ON THE OHMIC CONTACTS AS A RESULT OF ITS SURFACE TENSION AND CAUSES A CORRESPONDING AGGREGATION OF THE BUMP OR PROTUBERANCE FORMING METAL.

Color video signal generating apparatus

Abstract: 1,217,984. Colour television camera. SONY CORP. 14 Feb., 1969 [14 Feb., 1968], No. 8221/69. Heading H4F. Image light is projected via a striped colour filter 6, Fig. 3, comprising a repeating sequence of red, green, blue and opaque index filter strips, Fig. 4 (not shown), on to a pick-up tube 3 e.g. a vidicon tube, and the resulting output signal is gated 17, 18 using pulses derived from the index strips to produce red, green and blue primary narrow-band colour signals R s , G s and B s which are fed to a compensating circuit 21. Signals R s , G s and B s are also added in circuit 20 to produce a composite signal M s which is fed together with the output of a low-pass filter 22 which comprises M o = R o + Go + B o to a compensating circuit 21 in which the signals B s , G s and B s are respectively multiplied by the ratio M o /M s to derive wide-band colour video signals R, G and B. In a further embodiment, Fig. 1, the image light is projected via dichroic mirror 10 which passes red and blue light and a striped colour filter 6 comprising a repeating sequence of red, blue and opaque index filter strips on to a first pick-up tube 3, and via the dichroic mirror which reflects only green light on to a second pick-up tube 14. From the output signal of tube 3 red and blue primary colour signals R s and B s , a composite signal M s = R s + B s and a low-frequency component signal Mo = R 0 + B o are derived as in Fig. 3 and fed to a compensating circuit 21 in which the signals R s and B s are multiplied by the ratio Mo/Ms to form wide band colour signals R and B. The output of tube 14 is used for generating a luminance signal, and is applied to a low-pass filter 24 and a high-pass filter 25. The output Go of filter 24 is added to M o in circuit 26 to produce signal Y o which is fed to matrix 27, to form colour difference signals R-Y o and B-Y o , and to an adder 28 wherein it is added to the output of filter 25 to form the luminance signal Y. The primary colour signals R s , G s and B s may be derived by synchronous detection, the frequency of the respective colour carriers being the same or different, Figs. 5 and 6 (not shown). A lens screen comprising a plurality of cylindrical lenses may be disposed adjacent the pick-up tube, an image of the striped colour filter being formed on the photo-conductive layer of the tube by each cylindrical lens, Fig. 8 (not shown).

Method of making a fuel cell electrode by thermal decomposition of silver carbonate

Abstract: A METHOD OF MAKING A FUEL CELL ELECTRODE IS DISCLOSED BY FORMING A PRESSED LAYER OF A POLYMER, AN ELECTRICALLY CONDUCTIVE MATERIAL AND SILVER CARBONATE AND THERMALLY DECOMPOSING THE SILVER CARBONATE TO FORM SILVER AND RENDER THE LAYER POROUS.

Bulk eraser with permanent magnet flux produced obliquely to cassette movement

Abstract: A bulk eraser for a recorded magnetic medium, the eraser consisting of a housing having a passage for the recorded magnetic medium and magnet means arranged adjacent said passage.

Electron gun device for color tube

Abstract: An electron gun device for color television picture tubes. The electron gun has three cathodes and a plurality of grids. Means are provided for equalizing the cutoff voltages of the cathodes by equalizing the intensity of the electric field reaching the cathodes from the grids. Equalization preferably is obtained by making one or more of the apertures in the first and second grids of a diameter different from that of the other apertures, or by making the distances of one or more of the cathodes from the grids different from the corresponding distances of the other cathodes, or by a combination of both of these arrangements.

Color cathode-ray tube with in-line plural electron sources and central section of common grid protruding toward central source

Abstract: In a cathode-ray tube of the single-gun, plural-beam type in which the plurality of beams are made to intersect each other substantially at the optical center of a main focusing lens, a beam-generating assembly is provided in which the respective beams are generated at suitable distances from the main focusing lens to correct for any disparity in the focusing effects imparted to the respective beams by the main focusing lens and any auxiliary lens and thereby to cause the beams to be precisely focused on the screen.