Wideband digital equalizers for subscriber loops
In accordance with the illustrative embodiment of the present invention, the sequential identification algorithm of Fan and Jenkins is modified to avoid the slow convergence in a dual filter feedback ... Read More
Inventors: Crespo, Pedro M.; Honig, Michal L.;, Assignee: Bell Communications Research, Inc. (Livingston, NJ) |
Modem pooling system for communicating between a telephone and a plurality of data terminals
With these problems in mind, therefore, it is the object of the present invention to provide a modem pooling system which can reduce load applied to the central control unit at the calling party numbe... Read More
Inventors: Mori, Hideyasu; Yamazaki, Yuichi; Mano, Hiroshi; Ikehata, Norimitsu; Aoki, Takashi; Sano, Yoshikazu;, Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP) |
Adaptive impulse noise canceler for digital subscriber lines
In order to provide a context for understanding the most general aspects of the present invention, a number of impulse noise canceler implementations are discussed; each of the implementations is pro... Read More
Inventors: Lechleider, Joseph W.;, Assignee: Bell Communications Research, Inc. (Livingston, NJ) |
Electronic mail system
The system and apparatus according to the present invention automatically establishes a data transfer path between local data equipment and remotely located data equipment over a non-dedicated telepho... Read More
Inventors: Wilber, James G.;, Assignee: Dynaflo Systems Inc. (Lowell, MA) |
Telecommunications transmission and signalling circuits
We claim: 1. In combination with a telephone exchange having an electronic current feed circuit which includes a pair of electronic circuit elements each of which has one terminal for connection to a ... Read More
Inventors: Rogers, Alastair Stanley; Thurlow, Norman Thorogood;, Assignee: The Post Office (London, EN) |
Loop to ground start circuit
What is claimed is: 1. Means for translating a loop start to a ground start signal in a communication system comprising: (a) latching switch means including first means for closing said switch means a... Read More
Inventors: Vaughan, Brian J. N.;, Assignee: Mitel Corporation (Kanata, CA) |
Loop-circuit for telephone line
I claim: 1. A loop-circuit for a telephone line comprising a gyrator circuit consisting of a transistor of which a first electrode is directly connected to one of the wires of the line, of which a sec... Read More
Inventors: Meunier, Bernard;, Assignee: Compagnie Generale de Constructions Telephoniques (Paris, FR) |
Digital memory system
In accordance with the present invention a digital memory system is provided wherein a received radio frequency signal is separated into a pair of quadrature signal channels, the signals in each of th... Read More
Inventors: Gordon, Bruce E.;, Assignee: Raytheon Company (Lexington, MA) |
Monitor for localizer antenna arrays
I claim: 1. A monitor for a localizer antenna array with a plurality of radiating elements comprising: (1) Means for obtaining sample currents proportional to the currents in the radiating elements, (... Read More
Inventors: Alford, Andrew;, Assignee: |
Method of introducing a baseline measurement into electronic positioning apparatus
The present invention pertains to a method of setting up an operation in electronic positioning apparatus utilizing two spaced apart reference stations wherein a control unit is provided having a keyb... Read More
Inventors: La Vance, Cecil N.; Beale, Allan A.;, Assignee: Motorola, Inc. (Schaumburg, IL) |
Electromagnetic field measuring technique to assess shielding effectiveness
I claim: 1. Apparatus for determining radiative and reactive magnetic and electric fields in a given region, comprising: a shielded enclosure having an aperture which aperture is to be located in said... Read More
Inventors: Dutcher, Clinton;, Assignee: G & H Technology, Inc. (Santa Monica, CA) |
Run length encoding and decoding methods and means
Against the background, an object of this invention is to provide relatively simple and reliable methods and means of discriminating between serial run length message codes of variable length. A more ... Read More
Inventors: Furuta, Eiichiro;, Assignee: Xerox Corporation (Stamford, CT) |
Method of determining temperature of gas and particles in magnetohydrodynamic generator
OF THE INVENTION Referring to the accompanying drawing the device comprises a primary radiation source 1 for examining plasma acting as a conductive working medium of a MHD generator, and an auxiliar... Read More
Inventors: Vasilieva, Inna A.; Urinson, Alexandr S.;, Assignee: Institut Vysokikh Temperatur Akademii Nauk SSR (Moscow, SU) |
Bottom electrodes for arc furnaces
I claim: 1. In an electric DC arc furnace having a vessel with a jacket which includes a bottom, there being electrodes arranged in the bottom, the interior of the vessel being lined with fireproof an... Read More
Inventors: Feuerstake, Ewald;, Assignee: Mannesmann AG (Duesseldorf, DE) |
Loran C receiver
What is claimed is: 1. A Loran C receiver comprising: (a) a keyboard means having a plurality of data entry keys for entering data including a GRI; (b) a microprocessor connected to the keyboard means... Read More
Inventors: Robinson, Eugene A.; Setliff, Jerry L.;, Assignee: Texas Instruments Incorporated (Dallas, TX) |
Apparatus for providing a course correction signal to an electronic automatic pilot to maintain a vessel on a predetermined geographic course
Briefly, the foregoing objects are generally achieved in an apparatus for providing a course correction signal which is suitable for combination with a heading error signal in an electronic automatic ... Read More
Inventors: Cunningham, Peter M.; Freeman, Robert M.;, Assignee: Metal Marine Pilot, Inc. (Tacoma, WA) |
Adaptive compass and north stabilization drive system
Accordingly, it is an object of the present invention to provide a compass drive system adaptable for use with either a DC or AC stepper-type or synchro-type gyro compass output, including situations ... Read More
Inventors: Tol, John M.;, Assignee: Raytheon Company (Lexington, MA) |
Radar apparatus
What we claim is: 1. A radar apparatus comprising means for transmitting a pulse of electromagnetic energy and for receiving a corresponding return pulse, coupling means coupled to the pulse transmitt... Read More
Inventors: Cashen, Ernest R.; Holder, Peter A. R.;, Assignee: E M I Limited (Hayes, GB2) |
Method of and device for monitoring a plurality of automatic selling machines
What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims: 1. A method of monitoring a plurality of automatic selling machines each having a plurality of... Read More
Inventors: Grunig, Dieter;, Assignee: Grunig Administration (Badger, MN) |
Method for reducing side lobes in antenna patterns
It is an object of the present invention to solve the above problems in conventional antenna system. It is a more specific object of this invention to provide a method for reducing side lobes in anten... Read More
Inventors: Sezai, Toshihiro;, Assignee: National Space Development Agency of Japan (Tokyo, JP) |
Switched-capacitor filter having digitally-programmable capacitive element
The present invention provides a method and circuitry for time-sharing a digitally-programmable capacitive element, allowing the number of capacitors required in an electronic circuit to be reduced. T... Read More
Inventors: Holberg, Douglas R.; Swanson, Eric J.;, Assignee: Crystal Semiconductor Corporation (Austin, TX) |
Segmented encoder and digital memory particularly for flash analog-to-digital converters
The invention is intended to provide an encoder for ultra fast high resolution flash ADCs. A simple multiplexing is performed. An optional buffer memory stores selected codes prior to a final processi... Read More
Inventors: Gulczynski, Zdzislaw;, Assignee: |
Autopilot with adaptive weather adjustment for marine vessels
The present invention automatically adjusts the gain of the autopilot to accommodate various sea states and encounter frequencies while maintaining critical damping of the heading control loop. The au... Read More
Inventors: Wesner, Charles R.;, Assignee: Sperry Marine Inc. (Charlottesville, VA) |
Film folding control apparatus of wrapping system
Accordingly, an object of the present invention is to provide a film folding control apparatus of a wrapping machine in which the troublesome setting operation mentioned above is eliminated and an att... Read More
Inventors: Denda, Toshio;, Assignee: Teraoka Seiko Co., Limited (Tokyo, JP) |
Monitor for remote alarm transmission
OF THE PREFERRED EMBODIMENT Referring first to FIG. 1, the preferred embodiment of a remote monitoring apparatus 10 is shown in a diagrammatic system connecting a local site 11 through a telecommunic... Read More
Inventors: Bonaquist, James P.;, Assignee: Electronic Data Systems Corporation (Southfield, MI) |
Guide for aiding in backing-up vehicles
What I claim as my invention is: 1. A guide to aid in backing-up a vehicle when the vehicle transmission is in the reverse position comprising generally vertically extensible and retractable guide str... Read More
Inventors: Toles, Perry G.;, Assignee: |
Auto-extending antenna
OF THE INVENTION FIG. 1 shows one configuration of a portable radio 10. A portable radio such as radio 10 is often designed to allow folding of the radio housing to some extent. This allows the housi... Read More
Inventors: Chan, Hiang B.; Tan, Her S.;, Assignee: Motorola, Inc. (Schaumburg, IL) |
Transmission of radio navigation phase corrections
However the present invention contributes a particularly satisfying solution to the problem thus posed. According to the invention, a method of aid to navigation is provided for use in differential mo... Read More
Inventors: Nard, Georges;, Assignee: Societe d'Etudes, Recherches et Constructions Electroniques-SERCEL (Carquefou, FR) |
LORAN-C equipment alignment
In FIG. 2 is seen the shape or waveform of every pulse transmitted by both master and secondary LORAN-C stations. The waveform of this pulse is very carefully chosen to aid in the detection of the th... Read More
Inventors: Brodeur, Lester R.;, Assignee: Sanders Associates, Inc. (Nashua, NH) |
Network monitor and test apparatus
An apparatus for monitoring and testing twisted pair lines in a network such as an Ethernet network is described. In the currently preferred embodiment, first and second DC currents are applied asynch... Read More
Inventors: Graham, Martin H.;, Assignee: Tut Systems, Inc. (Pleasant Hill, CA) |
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