Abstract:
PURPOSE: An SBD(Simultaneous Bi-Directional) transceiver is provided to reduce a size of an output buffer in order to decrease a parasite capacitance, thereby carrying out a stable operation in a frequency. CONSTITUTION: The first differential amplifier(310) consists of the first input end pairs, the first output end pairs, and the first constant current source(321). The second differential amplifier(330) consists of the second input end pairs, the second output end pairs, and the second constant current source(341). The third differential amplifier(350B) consists of the third input end pairs, the third output end pairs, and the third constant current source(363). The fourth differential amplifier(350A) consists of the fourth input end pairs, the fourth output end pairs, and the fourth constant current source(373). Each of the first input end pairs is connected to each of the second input end pairs, while each of the first output end pairs is connected to each of the fourth input end pairs. Each of the second output end pairs is connected to each of the third input end pairs, while each of the third output end pairs is connected to each of the fourth output end pairs.
Abstract:
PURPOSE: A digital picturing device and a data transfer mode selecting method thereof are provided to perform data communication with a PC more smoothly by previously selecting one of the mode to transfer the data of a currently pictured image to the PC in real-time or the mode to transfer the previously stored image data to the PC. CONSTITUTION: A main storage(220) stores each firmware for two data transfer modes transferring the image data pictured through a camera(210) to an external device(100) in different methods and each descriptor including the ID information of the firmware. A mode selector(254) outputs a mode selection signal for one of the transfer modes. A transmitting module(280) transfers the image data to the external device in the different methods for each transfer mode. A controller(290) controls the transmitting module by setting the transfer method matched with the selected transfer mode, reads the descriptor of the firmware matched with the transfer mode from the main storage if the transmitting module is connected to the external device, and provides the read descriptor to the transmitting module.
Abstract:
PURPOSE: A semiconductor device is provided to simultaneously transmit data in both directions and perform a test process on both directions by using conventional ATE(automatic test equipment). CONSTITUTION: At least two pads are included in the first port. At least two pads are included in the second port. A normal data path connects at least one pad of the two pads of the first port with an inner circuit of the semiconductor device. A transmission path is connected between at least one pad of the two pads of the first port and at least one pad of the two pads of the second port. A test path is connected between at least one pad of the two pads of the first port and at least one pad of the two pads of the second port. A selection circuit selects the transmission path or the test path.
Abstract:
PURPOSE: A memory module equipped with a path transferring high speed data and low speed data, and a memory system equipped with the same are provided to design various shape of memory modules by increasing degree of freedom as decreasing a pin number connected to a mother board, and to transfer data at high speed by decreasing crosstalk and loss or attenuation of the transferred data. CONSTITUTION: A plurality of memories(55_1-55_9) is installed to the memory module(50). The first connector(57) installed to a position of the memory module receives the low speed data. The second connectors(51_1-51_9) installed to the position different from the first connector transfer the high speed data and connect to a transfer line(33) or an optical fiber. Converting circuits(53_1-53_9) receive/convert the data inputted through the second connector into parallel data and output a result to the memories. Otherwise, the converting circuits receive/convert the data output from the memories into serial data and output the result to the second connector.
Abstract:
A socket and a printed circuit board for testing a semiconductor device packaged by a chip scaled package (CSP) method, and a semiconductor device testing method are provided. In order to test the semiconductor device packaged by a CSP method, the upper wall of the testing socket has a socket aperture formed to expose the pads of the semiconductor device to be tested to the outside of the testing socket. The testing socket may be mounted under the printed circuit board. The printed circuit board has a board aperture formed over the socket aperture. The pads of a semiconductor device are directly probed through both the socket aperture and the board aperture, so that the waveforms of a semiconductor device can be measured.
Abstract:
PURPOSE: An information processing system is provided to make the flight time of a clock signal identical to that of a data signal so that it can stably operate a Rambus DRAM mounted in a memory module though an operation frequency gets higher. CONSTITUTION: The system comprises a memory controller(110), and the first and second RIMM(Rambus in-line memory module, 120, 130). The memory controller(110) and the first and second RIMM(120, 130) are connected to a data bus(140), a clock line(150) and a reference voltage line(160). The clock line(150) has a closed loop structure comprising the first clock line segment(151) and the second clock line segment(152). Each clock line segments(151, 152) include a U-turn portion, the first terminal and the second terminal. The first terminals of both the clock line segments(151, 152) are commonly connected to a clock generator(170). The second terminals of both the clock line segments(151, 152) are connected to a terminal voltage via a terminal resistor. Accordingly, the distance between the clock generator(170) and the terminal resistor is identical to a length of the data bus(140), and each length of the clock line segments(151, 152) is also identical to a length of the data bus(140). As a result, the flight time of the clock signal gets identical to that of the data signal.
Abstract:
PURPOSE: A semiconductor device socket, printed circuit board and testing method for semiconductor device is provided to directly detect waveform at the semiconductor surface during high speed operation of semiconductor device which is packaged a chip scaled package system. CONSTITUTION: A socket(60) for testing a semiconductor device which is packaged by a chip scaled package system, comprises outer walls(61), an upper wall and a lower support for fixing the semiconductor device; a plurality of ball contact springs(62) contacting each of balls connected to pads of the semiconductor device, and which penetrate through the upper wall; and an opening(68) formed at the upper wall of the test socket so as to allow pads of the semiconductor device to be exposed outward from the test socket. A printed circuit board includes a bottom surface to which the upper wall of the socket is attached, and an opening formed to allow the opening formed at the socket to be opened.
Abstract:
데이터의 듀티 사이클(duty cycle)을 보정하는 듀티 사이클 보정 회로 및 그 방법이 개시된다. 클럭 듀티 사이클 보정기는 클럭 신호를 입력하고 상기 클럭 신호의 듀티 사이클 에러에 각각 비례하되 그 비율이 다른 제1 및 제2 듀티 사이클 제어 신호와 상기 클럭 신호의 듀티 사이클이 보정된 내부 클럭 신호를 발생한다. 제1 기준 전압 발생기는 제1 기준 전압을 발생한다. 제2 기준 전압 발생기는 상기 제1 기준 전압과 상기 제1 및 제2 듀티 사이클 제어 신호들을 입력하고 상기 제1 기준 전압과 상기 제1 및 제2 듀티 사이클 제어 신호들을 합산 및 증폭하여 제2 기준 전압을 발생한다. 데이터 수신기는 데이터와 상기 제2 기준 전압 및 상기 내부 클럭 신호를 입력하고 상기 내부 클럭 신호에 동기되어 상기 데이터와 상기 제2 기준 전압을 비교 및 증폭하여 상기 데이터의 듀티 사이클을 보정한다. 따라서, 입력되는 데이터의 불완전한 듀티 사이클이 50%로 보정된다.
Abstract:
PURPOSE: A semiconductor device module and its radiation system is provided which have new construction, operate more stably by improving the heat radiation problem to prevent bad operation due to temperature rise caused by tendency of the semiconductor device towards high-speed and high-capacity. CONSTITUTION: A semiconductor device module(10) comprises many semiconductor devices,printed circuit board on which the semiconductor devices are mounted and which are combined by circuit pattern to accomplish electrical connection, and a heat radiation plate(16) which is mounted to the printed circuit board to radiate outward the heat occurred in response to the operation of the semiconductor device. A thermoelectric cooler(17) operated according to the operation of the semiconductor device is arranged on the heat radiation plate. A heat radiation system(20) comprises the semiconductor devices, the printed circuit board, the heat radiation plate, a semiconductor device module having thermoelectric cooler mounted to the heat radiation plate, a temperature sensor(22) for measuring temperature of the semiconductor device module, and a controller(21) for driving the thermoelectric cooler when temperature value measured by the sensor is above a predetermined temperature. Accordingly, overall temperature of the module is rapidly lowered since heat is rapidly dissipated and radiated. Also, since volume of the cooler is small, overall volume occupied by the module is not large. The resultant system has low noise because there is no great noise source like cooling fan.
Abstract:
PURPOSE: A substrate for mounting a ball grid array package is provided, which easily mounts and separates a memory device of a ball grid array package to a substrate. CONSTITUTION: The substrate for mounting a ball grid array package comprises: a substrate body (12) having an upper surface and a lower surface; a wire pattern (18) to be formed at one surface of the substrate body (12) for connecting a BGA package (30) to an external electronic device; and a clip (20) to be arranged at both sides of the substrate body (12) for fixing the BGA package (30) to be mounted on the substrate body (12), including a rotation bar (26) to be arranged at a distance position of the substrate body (12) for performing a rotation movement, a supporting bar (28) to be connected to both terminals of the rotation bar (26) for guiding the rotation movement, and a fixing bar (24) to be formed with the rotation bar (26) in one body. Thereby, it is possible to increase the memory capacity.