摘要:
Disclosed herein is a ball grid array (BGA) package stack that is not limited by ball arrangement because it utilizes a foldable circuit substrate, which permits interconnection between upper and lower individual BGA packages. The foldable circuit substrate has three portions. By bending the middle second portion, the foldable circuit substrate is folded in two. In the lower BGA package, an IC chip is attached on and electrically connected to a top surface of the first portion, and external connection terminals such as solder balls are formed on a bottom surface of the first portion. The top surface of the first portion is covered with a molding resin to protect the chip, and the third portion is placed on an upper surface of the molding resin. The upper BGA package is constructed in a similar manner to the lower BGA package as described above. For stacking, the interconnection terminals of the upper BGA package are joined and electrically connected to the third portion of the foldable circuit substrate of the lower BGA package.
摘要:
A packing structure for a surface mounting type semiconductor package, wherein at least one semiconductor chips are mounted on a die pad. A conductive pattern is formed on a printed circuit board which is located beneath an exposed side of a die pad of the package. A nonconductive thin film or a conductive layer is formed between the conductive pattern and the die pad. The conductive pattern is electrically connected to the die pad so that there is generated the package voltage difference therebetween, thereby reducing the electric noise of the package and facilitating high speed operation of the package without reducing a mounting density.
摘要:
A broadcast retransmitting method, a broadcast retransmitting apparatus, a relay apparatus and a broadcast retransmitting system using the same, are provided. The broadcast retransmitting apparatus includes a demodulation unit which receives and demodulates a modulated broadcast, a modulation unit which modulates the demodulated broadcast, a spectrum sensing unit which detects an available band through spectrum sensing, and a control unit which retransmits the modulated broadcast to at least one surrounding apparatus. The broadcast retransmitting method includes receiving and demodulating a broadcast which has been modulated according to a first modulation method, and modulating the demodulated broadcast according to a second modulation method different from the first modulation method; detecting an available band from an idle band through spectrum sensing; and retransmitting the broadcast which has been modulated in the second modulation method to at least one surrounding apparatus using the detected available band.
摘要:
A system for transmitting a transport stream including a robust stream is provided. The transmitting system includes an adaptor for, when receiving a first stream, making a space in the first stream to insert a second stream; a Reed-Solomon (RS) encoder for RS-encoding the input second stream; a Cyclic Redundancy Check (CRC) processor for converting the RS-encoded second stream to a stream comprising an added CRC bit sequence; and a stuffer for inserting the stream to the space in the first stream and outputting a transport stream. Hence, the robust stream can be efficiently transmitted.
摘要:
In a method of manufacturing a photomask pattern, a light-shielding layer pattern and an anti-reflective layer pattern are formed sequentially on a transparent substrate. Oxidation and nitridation processes are performed on a sidewall of the light-shielding layer pattern to form a protection layer pattern on a lateral portion of the light-shielding layer pattern.
摘要:
Provided is a camera module including a housing that is formed in a rectangular box shape and has a cylindrical barrel coupling portion extending upward from the central portion thereof; an image sensor module that is mounted in the housing; a lens barrel that has a lens insertion port provided in the central portion thereof and a housing coupling portion extending downward therefrom, the housing coupling portion being closely coupled to the barrel coupling portion of the housing; a wafer lens that is mounted in the lens insertion port of the lens barrel; and a lens fixing cap that is covered on the upper end portion of the lens barrel.
摘要:
A trellis encoding device includes a plurality of trellis encoders to perform trellis-encoding of a transport stream into which a supplementary reference signal (SRS) has been inserted, and performs a memory reset in a region that precedes an SRS; and a parity compensation unit to compensate for parities of the transport stream in accordance with values stored in memories included in the trellis encoders. The plurality of trellis encoders may be implemented in diverse types. The trellis encoding device can perform a memory reset selectively using the stored value of the memory and the inverted value thereof, or selectively using the stored value of the memory and a fixed value. By properly resetting the memory in processing the transport stream into which the SRS has been inserted, DC offset can be reduced.
摘要:
Provided is a method of processing virtual image files, the method including displaying a file list, receiving an input for selecting a virtual image file or a title from the file list, and extracting and playing back the selected virtual image file or the selected title.
摘要:
Disclosed herein is a ball grid array (BGA) package stack that is not limited by ball arrangement because it utilizes a foldable circuit substrate, which permits interconnection between upper and lower individual BGA packages. The foldable circuit substrate has three portions. By bending the middle second portion, the foldable circuit substrate is folded in two. In the lower BGA package, an IC chip is attached on and electrically connected to a top surface of the first portion, and external connection terminals such as solder balls are formed on a bottom surface of the first portion. The top surface of the first portion is covered with a molding resin to protect the chip, and the third portion is placed on an upper surface of the molding resin. The upper BGA package is constructed in a similar manner to the lower BGA package as described above. For stacking, the interconnection terminals of the upper BGA package are joined and electrically connected to the third portion of the foldable circuit substrate of the lower BGA package.
摘要:
A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TRS encoder for to TRS-encode an MPEG-2 transmission stream having null data for inserting an SRS data and a TRS parity at predetermined positions, randomizer to input and randomize data stream from the TRS encoder, a SRS exchanger to replace the null data for inserting the SRS data to the known data, and an encoder for encoding a data streams to which the Known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization and further uses the TRS parity for correcting error of the received signal, so that the digital broadcasting reception performance can be improved at poor multipath channels.