Showing papers by "AT&T Labs published in 1983"
01 Dec 1983
TL;DR: In this article, it was shown that every channel can be routed using 2d+O(1) tracks, where O(n) is the number of tracks required for each channel.
Abstract: @n) tracks. In practice, it appears that the flux never exceeds a small constant. In this case the algorithm performs asymptotically better than the best-known knock-knee algorithm [21], and almost as well as the best-known three-layer algorithm [19], without requiring the use of either knock-knees or three layers of interconnect. In addition, the three-parameter model, which is closer to the design rules of current fabrication technologies, is presented. Under this model, it is shown that every channel can be routed using 2d+O(1) tracks.
68 citations
Patent•
11 May 1983TL;DR: In this paper, a host switching system and a number of remote switching modules are selectively interconnected by a time-multiplexed switch such that voice and data traffic as well as control information is conveyed between modules without being routed through the host system network.
Abstract: An arrangement comprising a host switching system and a number of remote switching modules which are selectively interconnected by a time-multiplexed switch such that voice and data traffic as well as control information is conveyed between modules without being routed through the host system network. The arrangement allows the integrated stand-alone operation of the remote switching modules and advantageously reduces traffic through the host system during normal operation.
24 citations
Patent•
18 Jan 1983TL;DR: In this article, an integrated circuit chip with a preferred ground structure and including only pull-down transistors (on-chip) is operated by means of an off-chip pull-up transistor arrangement for precharging the data bus to logic high.
Abstract: An integrated circuit chip with a preferred ground structure and including only pull-down transistors (on-chip) is operated by means of an off-chip pull-up transistor arrangement for precharging the data bus to logic high. The arrangement exhibits relatively low noise characteristics allowing relatively high frequency operation without generating noise voltages which exceed FET threshold voltages.
13 citations
Patent•
31 Jan 1983TL;DR: The pyrolysis of aromatic compounds with fused rings in the aromatic system which form free radicals on the peri position, for example, by eliminating a stable inorganic gas produces desirable products as discussed by the authors.
Abstract: The pyrolysis of aromatic compounds with fused rings in the aromatic system which form free radicals on the peri position, for example, by eliminating a stable inorganic gas produces desirable products. These products include electrically conductive inert films. Further, with the addition of suitable inorganic compounds to the reactant, superconducting materials are obtainable. The addition of sulfur to the pyrolysis reactant also is possible and allows production of compounds useful as donors for the production of organic electrically conducting compositions.
3 citations