摘要:
An adaptive error detection and correction apparatus for an Asynchronous Transfer Mode (ATM) network device comprises a sensing unit for sensing a congestion condition in the ATM network and a global pacing rate unit for adaptively reducing a maximum allowable transmission ratio of ATM cells containing information to idle ATM cells in response to a sensed congestion condition. A processor stores a number corresponding to a relatively high maximum allowable transmission ratio in the global pacing rate register in the absence of a sensed congestion condition, and stores a number corresponding to a relatively low maximum allowable transmission ratio in the global pacing rate register in response to a sensed congestion condition. A controller adjusts the maximum allowable transmission ratio in accordance with the number stored in the global pacing rate register. A plurality of peak pacing rate counters reset to predetermined values upon decrementation to zero, the predetermined values corresponding to service intervals for segmentation of Conversion Sublayer Payload Data Unit (CD-PDU)s. The processor further comprises means for assigning the counters to selected CD-PDUs, and sensing the counters to determine whether or not segmentation of said selected CD-PDUs is within the respective service intervals. The apparatus further comprises a channel group credit register having bits corresponding to the respective counters.
摘要:
A process for forming vias in semiconductor structures includes the step of forming a pillar (32) on an underlying dielectric layer (26) prior to deposition of the metallization layer (M1). The pillar (32) is located above the diffusion region (18) preferably and serves to provide substantially equal distances or heights (d1, d2) for etching vias from the top planarized surface (34) to the metallization layer (M1) deposited over the field oxide region (16) and over the diffusion region (18).
摘要:
A reconstruction filter is described. An input is configured to receive an output signal from a digital to analog converter (400). An input sampling circuit (402) is operative to store a sample of the output signal from the digital to analog converter (400). An input pulse generating switch (404) that generates a pulse, the energy of the pulse being determined by the sample of the output signal from the digital to analog converter (400). An amplifier (410) receives the pulse at an amplifier input and provides an output signal at an amplifier output so that an output signal is produced that reduces distortion caused by imperfections in digital to analog converter (400).
摘要:
An integrated circuit (12) is mounted on and interconnected with a circuit board (14) by an array of electrically conductive columns (16). The assembly (10) is fabricated by initially interconnecting the integrated circuit and the circuit board with an array of reflowable electrically conductive solder balls that correspond to the columns respectively. The circuit board is held with the integrated circuit extending downwardly therefrom. Sufficient heat is applied to cause the solder balls to reflow. The integrated circuit is pulled downwardly away from the circuit board by gravity such that the balls are stretched to form the columns, and the assembly is allowed to cool such that the columns solidify. A fixture may be provided against which the integrated circuit abuts after it has moved away from the circuit board by a predetermined distance such that the columns have a precisely determined height.
摘要:
A planarization process and the resulting structure are disclosed. Dielectric layers (22/24) are successively deposited over nonplanar first level contacts (18/20) and patterned to form interlevel vias where interconnect plugs to first level contacts are desired. A conductive layer (36) which fills the vias conformally is covered with a photoresist layer (38). The layers (38, 36, 24) are then etched at substantially the same rate to provide planarized contact plugs (28) which are planar with the interlevel dielectric (22/24).
摘要:
A novel synchronization scheme for use in connection with digital signal video decoder (58) comprises a pre-parser (52), a channel buffer (54), and a post-parser (56). The pre-parser (52) synchronizes to a multiplexed system bitstream received from a fixed rate channel (50). The video bitstream component of a multiplexed system bitstream is then extracted and synchronized prior to being transferred bit-serially from the pre-parser (52) to a channel buffer (54). The post-parser (56) is coupled to the channel buffer (54) and to a video decoder (58) in a series configuration. The post-parser (56) separates the various layers of video data from the video bitstream component. The post-parser (56) performs a translation operation on the video bitstream component and converts the bitstream data into symbol data. The symbol data is subsequently processed by the video decoder (58) so as to reconstruct an originally encoded picture or frame. Preferably, the multiplexed system bitstream data structure conforms to some format agreed upon among video digital businesses involved in transmission and reception. In accordance with one aspect of the present invention, the pre-parser (52) and the post-parser (56) operate independent of each other, and operate at different processing rates.
摘要:
A method is provided for the controlled formation of voids (18) in integrated circuit doped glass dielectric films (13, 19). The film (13, 19) can be formed of borophosphosilica glass (BPSG) or other types of doped glass. The method involves the steps of providing a substrate (11) on which conductors (15, 16) are formed, depositing a first layer (13) of doped glass to a thickness in a predetermined ratio to the size of the space (17) between conductors (15, 16), reflowing the first doped glass layer (13), applying one or more additional doped glass layers (19) to make up for any shortfall in desired total doped glass thickness, and performing a high temperature densification to smooth each additional layer (19). The method provides for increased integrated circuit speed by controlled formation of voids which have a low dielectric constant and therefore reduce capacitance between adjacent conductors. The method can be performed using existing doped glass deposition and reflow equipment.
摘要:
An integrated network browser controller chip (218), network device (202), and network system (204) is disclosed for data transmission and reception over a network. The network browser chip includes a microprocessor (212) for operating a network browser program to connect the network browser chip to the Internet, an on-chip memory for storing the network browser (216) and the operating system program, a communications interface (210) for connecting the network browser chip to the Internet, and a user interface (234) for transferring user instructions to the network browser chip and for transferring data from the network to the user. A network browser device is further disclosed which utilizes a single integrated network browser controller chip (218) for connecting the device to the network (204). A non-networking electronic device is further disclosed which is modified with the integrated network browser controller chip (212) to enable data transmission and reception over the network.
摘要:
A novel channel buffer management scheme for a video decoder minimizes the amount of memory allocated to buffer a video bitstream received from a transmission channel. A channel buffer accumulates picture data encoded in a video bitstream received from a fixed rate channel. Picture data is read out of the channel buffer by a video decoder immediately after a predetermined or expected amount of bitstream data is received by the channel buffer. Picture decoding, reconstructing, and displaying operations are synchronized to permit the transfer of picture data from the channel buffer to the decoder whenever all of the data bits comprising a picture are received in the channel buffer. A microcontroller monitors and regulates the operation of the novel channel buffer management scheme to avoid overflow or underflow of bitstream data in the channel buffer. In accordance with one aspect of the present invention, a display controller and picture reconstruction means are fabricated as an monolithic integrated circuit device.
摘要:
A method (30) for interleaving a plurality of formatted data streams (10) on a network (20) wherein the formatted data streams (10) are divided into a further plurality of time bites (44) and synch characters (48) are added thereto in an add synch character operation (46). The time bites (44) are then transmitted as an assembled serial data stream (39) in a serializer (31). In a deserializer (32) the time bits (44) are reconstituted into the separate individual formatted data streams (10).