摘要:
In a conventional construction to obtain a reference signal for a tuner and a subcarrier for color difference signal demodulation by only one quartz oscillator, the reference signal is unstable due to a PLL operation for oscillation of the subcarrier, which causes tuning error or tuning shift. To realize stable tuning operation, in an oscillation signal processing apparatus having a construction to use one quartz oscillator to obtain a reference signal for a tuner and a subcarrier to demodulate a color difference signal, a PLL operation is performed with the quartz oscillator and a color burst signal when the tuning operation is not performed, while a phase comparison operation is stopped and oscillation is fixed to 3.58 MHz when the tuning operation is performed.
摘要:
A multi-system power supply circuit for providing power supplies different in system, has signal generating circuits which correspond to the power supplies different in system, and generates repetitive frequency signals corresponding to the number of power supply systems, or indicating voltage generating circuits which correspond to the power supplies different in system, and generates voltages corresponding to the number of power supply systems. When any one of the power supplies becomes abnormal, the repetitive signal supplied to the detection indicating circuit from the repetitive frequency signal generating circuit corresponding to that power supply is turned on and off, or the indicating voltage generating circuit applies the indicating voltage to the detection indicating circuit, so that it can be detected with ease which of the power supply systems is abnormal. Also in the case where the supply circuit of a plurality of power supply systems become abnormal, the repetitive frequencies which are indicated with a predetermined time interval, or the magnitudes of the voltages which are indicated are utilized to detect which systems are abnormal. Hence, the power supply circuit can be repaired or inspected with high efficiency.
摘要:
A CRT driving circuit includes a cathode control circuit for controlling a cathode voltage of a CRT on the basis of a video signal created by a video circuit, a power supply circuit for creating a power supply voltage for each of the cathode control circuit and the video circuit, a switch circuit provided between the power supply circuit and the cathode control circuit, and a monitor control circuit for on/off controlling the switch circuit and the power supply circuit on the basis of a power-on/off externally inputted signal. In response to the power-on/off signal, when the monitor control circuit switches the switch circuit and the power supply circuit into an off-state, it turns off the power supply circuit later than the switch circuit. Even after a power-switch is turned off, the video signal is supplied to the cathode control circuit so that the cathode control circuit continues its on-state. Thus, the charges left in the CRT while the power-switch is turned off are discharged through the cathode control circuit in the on-state.
摘要:
A heater abnormality detecting circuit includes a heater winding. A fly back pulse extracted by the heater winding is supplied to a heater through a heater resistor, and voltage-divided and supplied to a micro-computer. The micro-computer determines a normality or abnormality on the heater by determining whether or not it is inputted with the voltage-divided fly back pulse in a predetermined time period.
摘要:
A method for preparing molded articles of a crosslinked polyolefin is here disclosed which comprises the steps of mixing polyolefin granules comprising polyolefin granules containing a hydrosilylation catalyst, polyolefin granules containing the copolymer of an alkenylsilane and an olefin, and if necessary, polyolefin granules containing neither the hydrosilylation catalyst nor the copolymer of the alkenylsilane and the olefin, and then heating, melting and molding the mixture in a molding machine.According to the present invention, the molded articles of the crosslinked polyolefin containing no residual crosslinking agent and having improved heat resistance and mechanical strength can be obtained by the easy method which comprises mixing the above-mentioned respective granules, and then heating, melting and molding the mixture.
摘要:
A thermoplastic resin composition comprising (a) 50-99% by weight of a polyarylenesulfide resin and (b) 50-1% by weight of a norbornene-type resin as essential components is disclosed. This resin composition possesses excellent stiffness properties and high heat resistance, and exhibits only small anisotropic properties and superior moldability during the molding operation, and is useful for molding various electronic parts, household electric or electronic parts and articles. Those having a Vicut softening point of 200.degree. C. or higher are especially useful for sealing electronic parts or photo-semiconductors.
摘要:
A syndiotactic graft copolymer is here disclosed in which a radical polymerizable unsaturated compound is grafted on a propylene homopolymer or copolymer, and this graft copolymer is obtained by heating a homopolymer having a substantially syndiotactic structure of propylene or a copolymer having a substantially syndiotactic structure of propylene and another .alpha.-olefin and a radical polymerizable unsaturated compound such as an unsaturated carboxylic acid or an unsaturated silane in the presence of a radical initiator up to the decomposition temperature or more of the radical initiator. This kind of graft copolymer can be used as a composition for adhesion. The graft copolymer in which the radical polymerizable unsaturated compound is a hydrolyzable unsaturated silane can be converted into a crosslinked polymer by heating in the presence of water, and it can also be converted into a water-crosslinkable resin composition by adding various additive thereto.
摘要:
A syndiotactic graft copolymer is here disclosed in which a radical polymerizable unsaturated compound is grafted on a propylene homopolymer or copolymer, and this graft copolymer is obtained by heating a homopolymer having a substantially syndiotactic structure of propylene or a copolymer having a substantially syndiotactic structure of propylene and another .alpha.-olefin and a radical polymerizable unsaturated compound such as an unsaturated carboxylic acid or an unsaturated silane in the presence of a radical initiator up to the decomposition temperature or more of the radical initiator. This kind of graft copolymer can be used as a composition for adhesion. The graft copolymer in which the radical polymerizable unsaturated compound is a hydrolyzable unsaturated silane can be converted into a crosslinked polymer by heating in the presence of water, and it can also be converted into a water-crosslinkable resin composition by adding various additive thereto.
摘要:
A printing head for use in a wire impact dot printer comprising a cylindrical heat radiating member, core block and nose frame. The core block is inserted into the heat radiating member and hermetically joined thereto by a heat conductive resin material. The heat radiating member has a mounting portion which is utilized to join the heat radiating member to a mounting reference surface of the carriage. The nose frame is secured to the heat radiating member by a positioning and fixing portion which registers with the mounting portion of the heat radiating member and mounting reference surface of the carriage.
摘要:
There is disclosed a document information filing system which displays the title information and the picture information by means of single display device comprised of a cathode-ray tube. A two-dimensional scanning device is provided for optically scanning a document to be filed to produce picture information corresponding to the document. The picture information produced by the scanner is magnetically recorded on a magnetic tape of an information custody device together with a retrieval information corresponding to the picture information and comprised of a plurality of code groups. When a proper code constituting the retrieval information is set by a keyboard, the title information including this code is selected from the information custody device. On the basis of the title information, desired document picture information is retrieved and extracted. The retrieval code of the title information and the desired document picture information are selectively transmitted to a cathode-ray display by way of a gate circuit.