Abstract: A power detector is provided for detecting closing of a power switch in a power supply, for producing a power-on signal after a predetermined time from detection of the closing of the power switch. An abnormality detector is provided for detecting an abnormal voltage produced in a circuit of a power amplifier, for producing an abnormality signal when detected. In response to the power-on signal, an output stage of the power amplifier is activated, and the output stage is cut off in response to the abnormality signal.

Abstract: A digital time base corrector which can perfectly eliminate residual errors. A sync clock signal whose phase is synchronized with a time base fluctuation included in a reproduction video signal is formed in accordance with at least one of the horizontal sync signal and the color burst signal which are separated from a reproduction video signal. The sync clock signal is phase-modulated in accordance with a burst error signal indicative of the time base fluctuation of the color burst signal in a period of time other than the generating period of time of at least the color burst signal in the reproduction video signal, thereby obtaining a write clock signal of the image memory.

Abstract: An optical recording medium has a substrate, a recording film of phthalocyanine coloring matter and provided on the substrate, a light reflection film on the recording film, and a protection film on the light reflection film. The light reflection film is made of Au and has a thickness less than 1500 .ANG..

Abstract: A PCB working machine includes a work table for holding a PCB substrate in place with a suction force; a spindle carrying a cutting tool; a controller for moving the spindle in accordance with a predetermined pattern; a collet chuck provided at a distal end of the spindle for clamping the cutting tool; a floating head encircling said collet chuck at a distant position and having an end plate in which a plurality of air blowing holes are provided; and an adjuster for adjusting the positional relationship between the floating head and the cutting tool.

Abstract: A grille of a car stereo has a recess, an operation flap pivotally mounted in the recess, an opening for inserting a sound recording medium formed at a position behind the flap, and a liquid crystal display panel provided in the flap. The lighting device has a light source provided behind the grille and a light introducing plate, so that the liquid crystal display panel and the opening are lighted by light transmitted from the light source through the light introducing plate.

Abstract: In an image reproducing apparatus, a music information reproducing unit reproduces musical information, lyrics information or still picture information from a music information recording medium on which the musical information, the lyrics information or the still picture information relating to a plurality of music pieces are recorded, and an image information reproducing unit retrieves moving picture information in a predetermined order in correspondence with respective music pieces in the music information recording medium from an image information recording medium on which moving picture information divided into a plurality of moving picture information segments is recorded, and reproducing said picture information segments.

Abstract: A pair of side panels of a car stereo have threaded holes. A pair of brackets are secured to the side panels for mounting the car stereo on a frame of an automobile. A preventing sheet is attached to a reverse side of the side panel for preventing chips broken off from the screws and the threaded holes from falling in a space behind the side panel.

Abstract: A digital-to-analog converter has a plurality of switches, each of which being responsive to a bit of a digital signal having n bits, to selectively pass therethrough a weighted current having a magnitude of 2.sup.i-1 Ic where i is an ith bit. The respective weighted current flows through a corresponding transistor into a resistor ladder circuit. The resistor ladder circuit has a plurality of arms, each of which receive a weighted current from the emitter of a corresponding transistor. The digital-to-analog converter further includes a plurality of base resistors connected in series such that the bases of the transistors are connected with corresponding junctions of the base resistors r1-r7. The plurality of base resistors carry a first current therethrough.

Abstract: An information recording medium playing apparatus detects a preset memory command of every data unit of a graphics information signal of a subcode of a CD format signal which playing an information recording medium. During play operation, address data corresponding to the respective preset memory commands are constantly stored in a memory. In a search mode, the head of desired graphics information is searched on the basis of the address data stored in the memory.

Abstract: An optical waveguide recording medium has optical waveguides on which minute refractive-index discontinuous portions for generating multiple reflected waveguide lights of different amplitudes and phases can be aligned in accordance with information to be recorded. A recorded-information reproducing apparatus splits a light beam from a light-emitting element into two, guides one of the split beams to the optical waveguides, and causes interference between a signal light reflected after modulation of the amplitude and phase of part of the guided beams and a light acquired by applying a frequency shift to the other beam to obtain an optical heterodyne output, thereby reproducing information recorded as a time-series signal waveform.

Abstract: Disclosed is a PCM signal reproducing/recording apparatus which comprises a reproducing device for reproducing a recording medium carrying PCM data and sub-code data recorded thereon, the sub-code data having sub-data and sub-ID for adding auxiliary information to the PCM data, and a recording device for recording the PCM data and sub-code data transmitted from the reproducing device onto a recording medium. The recording device is arranged to selectively record the sub-code data judged to be correct, onto a recording medium, of those sub-code data transmitted from the reproducing device.

Abstract: An LB film forming device according to the present invention having a packing control device by which a barrier is moved under the control of the packing control device to compress a sample until the sample spreading over the surface of a subphase liquid provides a predetermined set surface pressure, the absorbance of the thus compressed sample is measured, and thereafter the barrier is moved under the control of the absorbance as desired so as to provide a predetermined set value of the absorbance. Such an LB film forming device may stably provide a film having predetermined film characteristics.

Abstract: A noise reduction circuit in a recording medium player is disclosed in which the time-axis of a video signal read out from a memory to be used for noise reduction is changed by a shift command signal for changing the time-axis of a video signal in order to keep the continuity of the phase of a color burst in special playback operation. Owing to the arrangement, even in a special playback operation, the phases of a chrominance signal and a luminance signal contained in a read out video signal, and those of a chrominance signal and a luminance signal contained in a video signal as a signal to be mixing-processed coincide with each other, which makes it possible to prevent the blur in a played back picture.

Abstract: A pulse noise suppressing system for an FM receiver which includes extracting a noise component from an FM detection signal; amplifying the noise component extracted with a gain that is controlled by an automatic gain control signal corresponding to a level of the amplified component; and providing an off control signal which is triggered when the level of the amplified component is higher than a predetermined level, the off control signal being used to interrupt the transmission of an FM detection signal to a following stage, thereby suppressing a pulse noise included in the FM detection signal. The predetermined level at which the off control signal is triggered is changed in accordance with the automatic gain control signal, or in accordance with a level detection signal corresponding to a level of a received signal.

Abstract: A discharge detector circuit is provided for detecting a discharging state of a battery of a motor vehicle. A lower limit voltage of the battery which is a lower limit voltage for starting an engine of the vouching is detected. Power supply to a car stereo is cut off when the discharge of the battery is detected and the battery voltage decreases to the lower limit voltage.

Abstract: A servo device for a disc player detects when the level of an error signal formed according to the output signal of the pickup is equal to or higher than a predetermined value, to provide a detection output. The device also detects when the frequency of the error signal is equal to or higher than a predetermined value, to provide another detection output. Then, it is determined from these detection outputs whether, during the closure of the servo loop, an oscillation occurs within the servo system by the servo convergence or by external interruption, so that the oscillation of the servo system can be positively detected and servo convergence resumed. The system may be implemented in either hardware or software.

Abstract: An optical magnetic recording system has a magnetic head for generating a magnetic field on a magneto-optical disk, and an optical head including a magnetic actuator is provided for irradiating a laser beam. A field cancellation magnet is attached to the back of the magnetic head for producing a magnetic force so as to cancel a leakage magnetic force of the magnetic actuator which affects recording of information. This positioning of the field cancellation magnet provides better compensation of the leakage field without affecting the modulating field of the magnetic head.

Abstract: In an optical disk recording/reproducing apparatus, a spindle control device in which a vertical synchronizing mark is detected so as to generate a synchronizing mark detection signal. A time base reference signal is generated at the same time, that signal being delayed by a variable delay circuit so as to perform phase control on a spindle motor for rotating the optical disk in accordance with a phase difference of the synchronizing mark detection signal from the delayed time base reference signal. Accordingly, it is easy to adjust, electrically, the relative position on the time base between the vertical synchronizing mark detection timing and a composite video signal to be recorded, by adjusting suitably the amount of delay of the variable delay circuit, without having to adjust the vertical synchronizing mark detector positionally.

Abstract: Disclosed is a PCM signal reproducing/recording apparatus which comprises a reproducing device for reproducing a recording medium carrying PCM data and sub-code data recorded thereon, the sub-code data having sub-data and sub-ID for adding auxiliary information to the PCM data, and a recording device for recording the PCM data and sub-code data transmitted from the reproducing device onto a recording medium. The recording device is arranged to selectively record the sub-code data judged to be correct, onto a recording medium, of those sub-code data transmitted from the reproducing device.

Abstract: A lens frame of the projection lens to be attached, for example, on a projector of a projection-type television comprising a lens barrel for supporting the projection lens, a support member for rotatably supporting the lens barrel so that the lens barrel can be rotated about an optical axis of the projection lens to a prescribed position, and a fixing portion for securing the lens barrel to the support member and for frictionally maintaining the lens barrel in a selected position without displacing the projection lens from the optical axis of the projection lens.