Abstract: A method of, and frame synchronizing device for, synchronizing systems having a digital interface. The systems are synchronized by extracting frame time information from a signal transferred from an external source through a digital interface, generating a frame reset signal, delayed by predetermined time based on the extracted frame time information, and resetting the entire systems based on the generated frame reset signal. Also, the color burst signal is free-oscillated during the digital interface mode in order to accommodate to the frame reset signal, which has a variable period.

Abstract: A radiation apparatus for an integrated circuit semiconductor device and for a portable computer are provided. The radiation apparatus for an integrated circuit semiconductor device mounted on a circuit board of an electronic system includes a radiation member and a fan. The radiation member radiates heat generated by the integrated circuit semiconductor device, the radiation member being coupled to the integrated circuit semiconductor device. The fan emits the heat, transferred from the integrated circuit semiconductor device through the radiation member, out of the circuit board of the electronic system, the fan being arranged in parallel with the same direction as a horizontal direction of the integrated circuit semiconductor device. The radiation member has a radiation plate, a heat block and an assembly of radiation fins. The radiation plate has an upper plane and a bottom plane and one end part of the radiation plate is located over the fan.

Abstract: An apparatus for receiving multi-channel caller identification data in a switching system with a path forming portion for forming a path to receive the caller identification data in response to an incoming ring signal from a plurality of central office lines; a multiplexer for selecting one of a plurality of channel signals containing the call identification data and received from the path forming portion; a decoder for sampling an analog signal of a corresponding channel selected by the multiplexer at a predetermined sampling frequency, to thereby convert the analog signal containing the call identification data into a PCM signal; a time switch for switching and outputting the converted PCM signal converted in the decoder and containing the call identification data to a corresponding channel; a demodulator for receiving the PCM signal output through the time switch to thereby demodulate the caller identification data; and a controller establishing a path for the caller identification data in response to the

Abstract: A structure of a ventilation fan provided with a plurality of blades has a performance curve characterized by a gentle slope throughout the wide operating range instead of an S-hysteresis curve, in order to overcome a fluctuation phenomena of the operating flow rate. The blade tip cross-section lies on a first imaginary cylindrical surface and an angle of attack and pitch angle of the blade tip are formed as respective trajections by intersecting the first cylindrical surface by a second cylindrical surface whose center axis has been rotated about two axes.

Abstract: A gearing arrangement for driving a photosensitive drum of an electrophotography process unit including a first drum gear mounted on one end of a shaft of a photosensitive drum for receiving the motion of a drive gear of a motor, a second drum gear mounted on the other end of the shaft of the photosensitive drum, a first gearing assembly connected with the first drum gear, and a second gearing assembly connected with the second drum gear, wherein the first and second gearing assemblies serve to uniformly distribute the torque of the drive gear.