Micro time and phase stepper
OF THE INVENTION The present invention utilizes the principle of multiplication of trigonometric functions; namely, cosine waves. FIG. 1 shows a simplified block diagram of a micro time and phase ste... Read More
Inventors: Nardin, Roy;, Assignee: ILC Data Device Corporation (Bohemia, NY) |
Adaptive differential pulse code modulation
FIG. 1 depicts an ADPCM system known to the prior art as exemplified by the cited Cummiskey et al. paper. In the known system an analog signal, such as human speech, is first sampled at a sufficient ... Read More
Inventors: Jayant, Nuggehally S.;, Assignee: AT&T Bell Laboratories (Murray Hill, NJ) |
Position detection encoder having plural light receiving and light emitting elements
Accordingly, the present invention has been developed with a view to substantially eliminating the above discussed drawbacks inherent in the prior art, and has for its essential object to provide an i... Read More
Inventors: Okutani, Norio;, Assignee: Matsushita Electric Industrial Co., Ltd. (Kadoma, JP) |
Low probability of interception relative position determination system
The relative radio navigation system of the present invention provides add-on LPI position and range determination. It determines range and bearing to/from a mobile apparatus, such as an aircraft, to ... Read More
Inventors: Wagner, Kenneth M.; Stahley, William; Van Cleave, James R.;, Assignee: NavCom Defence Electronics, Inc. (El Monte, CA) |
Data communication apparatus
Accordingly, a primary object of the present invention is to provide an improved data communication apparatus having an error retransmission function, thereby overcoming the above-described drawbacks ... Read More
Inventors: Yoshida, Takehiro; Matsuzaki, Susumu;, Assignee: Canon Kabushiki Kaisha (Tokyo, JP) |
Apparatus for converting a signal of a first sample rate into a signal of a second sample rate
It is an object of the present invention to provide equipment by which signals of different sample rates can be converted so as to provide a common sample rate at which all can be processed. Briefly, ... Read More
Inventors: Vogt, Lothar; Poschen, Dieter;, Assignee: Blaupunkt-Werke GmbH (Hildesheim, DE) |
Combustible gas sensor
Accordingly, it is an object of the present invention to provide a combustible gas sensor by making more uniform the thermal and compositional environment surrounding the reference bead and the measur... Read More
Inventors: Vaughn, Eldon D.; Creason, Samuel C.;, Assignee: Rosemount Analytical, Inc. (La Habra, CA) |
Protective relay system and sampling synchronizing method therefor
An object of the invention is to minimize the delay in the transmission of the electrical quantity data, and to minimize the amount of information or data to be transmitted for the purpose of the sync... Read More
Inventors: Yamaura, Mitsuru; Shuto, Ituo;, Assignee: Kabushiki Kaisha Toshiba (JP) |
Locating system and method
Among the several objects of the present invention is the provision of a relatively simple system and method for locating a number of vehicles or carriers in a defined area without using a predetermin... Read More
Inventors: Bent, Rodney B.; Casper, Paul W.;, Assignee: Scientific Development Corporation (Palm Bay, FL) |
Augmented key and cylinder lock
The present device is in one environment incorporated in a lock 6 in which a driver bar 7 rotates about an axis 8 to actuate the lock. An early version of a lock of this kind is shown in Walter R. Sc... Read More
Inventors: Schlage, Ernest L.;, Assignee: Schlage Lock Company (San Francisco, CA) |
Multistage network with distributed pipelined control
It is therefore an object of the present invention to provide in a multistage bufferless network a combination of low latency and probability of blockage. It is another object of the invention to prov... Read More
Inventors: Franaszek, Peter A.;, Assignee: International Business Machines Corporation (Armonk, NY) |
Framer circuit for use in a DTDM network
The digital network transport system, referred to herein as Dynamic Time Division Multiplexing (DTDM), is a flexible network transport system capable of effectively handling both circuit and packet tr... Read More
Inventors: Beckner, Mark W.; Chao, Hung-Hsiang J.; Robe, Thomas J.; Smoot, Lanny S.;, Assignee: Bell Communications Research, Inc. (Livingston, NJ) |
Interface for ISDN channels
It is an object of the present invention to overcome the problem described above. It is another object of the present invention to improve a line interface. It is another object of the present inventi... Read More
Inventors: Kagami, Naoto;, Assignee: Canon Kabushiki Kaisha (Tokyo, JP) |
Method of and system for synchronizing data reception and retransmission aboard communication satellite
We claim: 1. A method of timing the reading of data bits in a stream of digital signals intermittently received by a relay station from a remote transmitting station, said digital signals arriving wit... Read More
Inventors: Cordaro, Giovanni; Dall'Olio, Cristiano; Di Pino, Duccio; Guarene, Eugenio;, Assignee: CSELT-Centro Studi e Laboratori Telecomunicazioni S.p.A. (Turin, IT) |
Clock signal extracting circuit
It is accordingly an object of the present invention to provide a clock signal extracting circuit which can eliminate the drawbacks of conventional circuits, which is economical and can be made small ... Read More
Inventors: Tomooka, Keiji;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
Adaptive jitter canceller having sinusoidal accentuator and jitter prediction filter
It is therefore an object of the invention to provide an adaptive jitter canceller in which the amount of memory and calculation time can be held within a reasonable range while meeting the required l... Read More
Inventors: Yoshida, Atsushi;, Assignee: NEC Corporation (Tokyo, JP) |
Method and apparatus for reducing power dissipation in multi-carrier amplifiers
OF THE DRAWINGS The features and advantages of the present invention outlined above are described more fully below in the detailed description in conjunction with the drawings where like reference nu... Read More
Inventors: Andre, Tore;, Assignee: Telefonaktiebolaget Lm Ericsson (Stockholm, CH) |
High density FM subcarrier modulation with standardized network layer
As illustrated in FIG. 1a, in an FM subcarrier system, a modulated subcarrier is linearly combined with an FM stereo signal to form a composite multiplex signal. Because this signal has not yet been ... Read More
Inventors: Dyson, Timothy F.; Davis, Steven J.; Kaiser, Gordon E.;, Assignee: Cue Corporation (Irvine, CA) |
Training of level learning modems
FIG. 1 shows, at the left, an analog modem 101 connected to the public switched digital network (PSTN)150 by a local loop 110. The current PSTN in the United States is largely a digital network in wh... Read More
Inventors: Wang, Zhenyu; Lai, Yhean-Sen; Xi, Jiangtao; Barazesh, Bahman;, Assignee: Lucent Technologies Inc. (Murray Hill, NJ) |
Method and apparatus for a low voltage high current bi-directional termination voltage regulator
Accordingly, the present invention provides a low voltage high current bi-directional termination voltage regulator. In one embodiment, the bi-directional termination voltage regulator is used to sour... Read More
Inventors: Covaro, Mark;, Assignee: Cisco Technology, Inc. (San Jose, CA) |
Time domain equalizer for ADSL
The invention provides an equalization technique that relies on time domain lms, has lower computational complexity and has lower steady state error.... Read More
Inventors: Nafie, Mohammed; Wu, Song;, Assignee: Texas Instruments Incorporated (Dallas, TX) |
Automatic gain control circuit for a modem receiver
An object of the present invention is to provide an automatic gain control circuit for a modem receiver that improves gain tracking for a large range of twisted pair loops. Another object of the prese... Read More
Inventors: Velez, Edgar; Dublin, Ian; Noel, Peter;, Assignee: Nortel Networks Limited (Montreal, CA) |
All-digital method and apparatus for demodulating an analog signal
It is an object of the invention to provide a demodulator that is totally digital in structure, and thus in which ISI-eliminating filtering must take place after the signal has been sampled and digiti... Read More
Inventors: Ezran, Philippe; Le Clec'h, Michel; Jeanclaude, Serge;, Assignee: France Telecom (Paris, FR) |
Test circuit of multiplex equipment
An object of the present invention is to provide a test circuit for multiplex equipment to be used when the multiplex equipment is installed or a failure occurs in the equipment, wherein the number of... Read More
Inventors: Yajima, Noboru;, Assignee: Fujitsu Limited (Kanagawa, JP) |
Echo canceller
OF THE EMBODIMENTS FIG. 1 is a block diagram illustrating an embodiment of an echo canceller of the present invention. In FIG. 1, an input terminal 1, encoder 2 and transmitting filter 20 form a tran... Read More
Inventors: Takatori, Hiroshi; Kokumai, Motohiro; Shinozuka, Tatsuko;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
Listener echo cancellation
The listener echo cancellation means of the present invention employs a finite impulse response (FIR) filter with adjustable coefficients to approximate the listener echo in a telephone line. The canc... Read More
Inventors: Cheng, King Y.;, Assignee: Silicon Systems, Inc. (Tustin, CA) |
Semiconductor integrated device
In the integrated service digital network, the training mode for getting the echo data is carried out prior to substantial data transmission. When sending from the receiving station is stopped and the... Read More
Inventors: Takeuchi, Yusuke; Kokubo, Masaru; Yabuta, Keizo; Kenmoku, Atuko; Okado, Kazuo;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
Method of recording and reproduction of information using a recording medium available for information overlap recording, a recording medium and a recording and reproducing apparatus using the method
An object of the present invention is to provide an information recording medium which can store first information (ROM information) which is recorded at manufacturing and second information (RAM info... Read More
Inventors: Tsuyoshi, Toshiaki; Tsunoda, Yoshito; Fujisawa, Hiromichi;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
RF power amplifier linearization
OF THE PREFERRED EMBODIMENT Referring now to the drawing, schematically depicted in FIG. 1 is an amplifier linearization system constructed in accordance with, and embodying, the principles of the pr... Read More
Inventors: Cleveland, John F.;, Assignee: SEA, Inc. (Mountlake Terrace, WA) |
Waste energy control and management in power amplifier
OF THE DRAWINGS These and other features and advantages of the invention will be readily apparent to one of ordinary skill in the art from the following description, used in conjunction with the draw... Read More
Inventors: Dent, Paul W.; Lampe, Ross W.;, Assignee: Ericsson GE Mobile Communications Inc. (Research Triangle Park, NC) |
Multiplexer-related 
