Local computer network transceiver

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4479228
SERIAL NO

06242708

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

An improved local computer network transceiver comprising transmitter, receiver, collision detection, and power supply circuits. The transceiver is connected between a plurality of host CPU controller interfaces and a coaxial cable with the coaxial cable being utilized as the communication medium at a nominal data rate of 10 megabits per second. The transmitter circuit includes triple redundancy in the output circuits to prevent single and double component failures from causing the transceiver to continuously jam the coaxial cable. The receiver circuit includes input compensation in order to permit use of the transceiver with long lengths of coaxial cable. The transceiver is capable of sending very wide pulses in order to aid in the location of coaxial cable impedance discontinuities (i.e. a time domain reflectometer function), and the ground planes associated with the host CPU interface cable and coaxial cable are physically separated by a plurality of interstage isolation transformers.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
3COM CORPORATIONPALO ALTO, CA7

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Crane, Ronald C Mountain View, CA 10 297

Cited Art Landscape

  • No Cited Art to Display

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
CHIPCIM CORPORATION (1)
* 5559883 Method and apparatus for secure data packet bus communication 79 1993
 
Novano Corporation (1)
8858263 Service over ethernet InterConnectable wall plate (SoEICWP) module 1 2011
 
ICS Electronics Corporation (1)
* 4959833 Data transmission method and bus extender 48 1989
 
TECHSEARCH, L.L.C. (1)
* 4647912 Coupling discriminator and interface adaptor 27 1985
 
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE (1)
* 4984248 High speed transceiver 8 1988
 
RATEZE REMOTE MGMT. L.L.C. (1)
* 6646546 Multiple-port gigabit ethernet distribution switch 8 2002
 
NETWORK SYSTEMS CORP. (1)
* 5355375 Hub controller for providing deterministic access to CSMA local area network 90 1993
 
Tamarack Microelectronics, Inc. (1)
* 5042051 Apparatus for transmitting and receiving Manchester coded digital data for IEEE 802.3 Ethernet/Cheapernet type local area network 0 1990
 
SENSORMATIC ELECTRONICS CORPORATION (1)
* 4996497 Cable compensation circuit 20 1989
 
MICROTEST, INC. (1)
* 4970466 TDR cable testing apparatus with pulse timing manipulation to automatically compensate for diverse cable characteristics 51 1989
 
FARALLON COMPUTING, INC. (2)
* 4943979 Local access network signal regnerator 5 1988
* 5119398 Signal regenerator for two-wire local area network 23 1989
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
6728601 Multiple host power control system and method 14 2001
 
HEWLETT-PACKARD COMPANY (1)
* 5048009 Broadcast station locator for a local area network 26 1989
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (2)
* 5191581 Method and apparatus for providing high performance interconnection between interface circuits coupled to information buses 72 1990
* 5946118 Communication collision detection 10 1997
 
CHRIMAR SYSTEMS, INC. (7)
7457250 System for communicating with electronic equipment 2 2003
8155012 System and method for adapting a piece of terminal equipment 9 2008
8942107 Piece of ethernet terminal equipment 0 2012
9049019 Network equipment and optional tether 0 2012
9019838 Central piece of network equipment 0 2012
8902760 Network system and optional tethers 5 2012
9812825 Ethernet device 0 2015
 
SIEMENS AKTIENGESELLSCHAFT (1)
* 4807249 Circuit arrangement for serial data transmission between a plurality of subscriber stations 2 1987
 
ENTERASYS NETWORKS, INC. (1)
* 4875223 Twisted pair adapter 25 1987
 
FLUKE CORPORATION (1)
* 5586054 time-domain reflectometer for testing coaxial cables 74 1994
 
Phoenix Logistics, Inc. (1)
* 6314481 Resistance integrated coupler between databus and terminal device having databus windings with high resistance wire with resistance being 1.5 times databus cable nominal characteristic impedance 4 1999
 
Acculan Ltd. (1)
* 5077756 Data network line driver 7 1990
 
M/A-COM TELECOMMUNICATIONS, INC., (1)
* 4751701 TDM collision detector 35 1985
 
THOMSON LICENSING (1)
* 6118233 Dynamic focus voltage disabling circuit 4 1998
 
MOTOROLA, INC. (1)
* 4745600 Network collision detection and avoidance apparatus 17 1986
 
ROBERT BOSCH GMBH (1)
6639774 Damping circuit for a two-wire bus system 1 2000
 
INTEL CORPORATION (1)
* 4785396 Push-pull serial bus coupled to a plurality of devices each having collision detection circuit and arbitration circuit 60 1988
 
Panduit Corp. (7)
7376734 VOIP telephone location system 22 2003
7519000 Systems and methods for managing a network 66 2003
7207846 Patch panel with a motherboard for connecting communication jacks 77 2004
7455527 Powered patch panel 32 2005
8325770 Network managed device installation and provisioning technique 1 2007
* 7993143 Powered patch panel 1 2010
* 2010/0304,577 Powered Patch Panel 2 2010
 
FLUKE CORPORATION (1)
* 5440528 Dual time base zero dead zone time domain reflectometer 15 1994
* Cited By Examiner