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Class 370/533 - Multiplexer or distributor using pulse amplitude modulation


Subclass of Class 370 - Multiplex communications
Definition: Subject matter directed to (a) a scanning or sampling switch
No. of patents: 32
Last issue date: 10/14/2008


NumberTitleIssue Date
7436856Method for transmitting voice data packets
A method for transmitting digital voice data packets between voice data inputs of a plurality of channels (A B, C, D) and a transmitter comprises the following steps: compressing the voice data packets to compressed data packets in a vocoder assigned to every channe...
10/14/2008
7412208Transmission system for transmitting RF signals, power and control signals via RF coaxial cables
A transmission system for RF signals, power and control signals over RF coaxial cables is disclosed. A coaxial cable line interconnects two devices, such as an instrument and a remote coupler. A control signal (e.g., data bit) and RF signals are multiplexed onto the...
08/12/2008
7369580Amplitude limiting circuit and CDMA communication apparatus
An amplitude limiting circuit for limiting the amplitude of a signal input to a power amplifier includes an amplitude converter, determination unit, peak detector, window filter, delay circuit, and multiplier. The amplitude converter calculates the amplitude value o...
05/06/2008
7356019Method and apparatus for converting optical signals to radio channels
The invention relates to a conversion of a pulse modulated signal to a radio frequency signal enabling use of applications and protocols designed for wireless optical links on radio frequency channels. The method comprises receiving the pulse modulated input signal,...
04/08/2008
7346119System and method for high speed digital signaling
The present invention relates in general to a method, apparatus, and article of manufacture for providing high-speed digital communications through a communications channel. In one aspect, the present invention employs adaptive or adjustable equalization circuitry a...
03/18/2008
7257380Integrated multimode radio and components thereof
An integrated multimode radio includes a multimode receiver and a multimode transmitter. The multimode receiver includes a shared receiver front-end, a receiver multiplexor, and a plurality of receiver IF stages. The multimode transmitter includes a shared transmitt...
08/14/2007
7158576Orthogonally-multiplexed orthogonal amplitude modulation method
An orthogonally-multiplexed orthogonally-amplitude-modulated (OMOAM) method is disclosed. The OMOAM signal is constituted by orthogonally multiplexing M component signals, each constructed by a data-chosen group of L orthogonal pulse-amplitude-modulated basis signal...
01/02/2007
7065167Method and apparatus for constellation shaping
A method and apparatus is disclosed for facilitating high-speed data communication. In one embodiment a receiver is configured to include error correction coding in an interleaved environment to increase data transmission rates. In one embodiment the signal mapping ...
06/20/2006
7034724Training circuit and method of digital-analog converter and analog-digital converter
A training method of a digital-analog converter is provided. The digital-analog converter comprises a plurality of parallel capacitors, each of which is floatingly coupled to a plurality of correcting capacitors. Two voltages outputted from the digital-analog conver...
04/25/2006
7030679Analog multiplexing circuits
A multiplexer circuit includes a plurality of switched differential amplifier circuits, one of which can be selected at a time. Each switched differential amplifier includes a pair of differential inputs and a pair of differential outputs, with each pair of differen...
04/18/2006
7027466Multiplexer, demultiplexer and multiplex communication system
An optical multiplex communication system includes a multiplexer and a demultiplexer. In the multiplexer, one of two modulated optical pulse train signals is attenuated by an optical attenuator so that amplitudes of the two signals differ from each other. Then, the ...
04/11/2006
7023809Intelligent concentrator usage
The present invention relates to a computer network and a method for using the network The network and method employ powered multiplexing connection devices which electronically couple two or more network devices to the network. The signals from the network devices ...
04/04/2006
6917654Increased digital bandwidth carried on an analog signal cycle using a data structure
A communication system is disclosed that encodes multiple bits of digital data on a single analog signal cycle. The communication system includes a digital data encoding system that receives the multiple bits of digital data and looks up the digital data in a Digita...
07/12/2005
6738173Limiting amplifier modulator driver
Apparatus for driving an optical system modulator to modulate data signals onto a light wave of the optical system. The modulator driver apparatus has a limited amplifier for receiving multiplexed low speed binary data signals and for generating amplified and limite...
05/18/2004
6711121Orthogonal code division multiplexing for twisted pair channels
A plurality of data signals are separated into parallel bit streams with each parallel stream having a bandwidth characteristic such that the combined cumulative effect of all the individual bandwidths produces a spectral characteristic of the data signals that matc...
03/23/2004
6614814Multiplexed signal demultiplexing device transmission error measuring device and transmission error measuring method
The transmission error measuring device comprises; a first counting circuit, a test data outputting circuit, a selecting circuit, a multiplexing circuit, a demultiplexing circuit, an arranging circuit, a data array monitoring circuit, a second counting ci...
09/02/2003
6560673Fibre channel upgrade path
The present invention involves hierarchical storage controllers which enable a scalable storage system. The scalable storage system is capable of causing a very large amount of discrete disk units to appear as a single drive. The scalable storage system i...
05/06/2003
6356562High-speed communications system for providing voice and data services
A high-speed communications system which permits high-speed communication services to be implemented with minimum modification to the existing communications facilities. A multiplexer/demultiplexer unit multiplexes outgoing signals to a network and demult...
03/12/2002
6188703Multiplexer for multiple media streams
A multimedia terminal having a host processor, an audio and video encoder, a system time clock, and a multiplexer is provided. The encoders input elementary stream of data into the multiplexer. The multiplexer is comprised of a mux processor, a FIFO which...
02/13/2001
4831621Device for analog multiplexing by charge transfer devices
An analog multiplexing device using charge transfer devices has as many charge transfer multiplexing registers R'i as there are input signals, at the frequency Fe, to be multiplexed, all of these registers preferably having the same length, and...
05/16/1989
4628493Sensor system with time division multiplexing telemetry
A seismic array containing a large number of seismic sensors, which may be optical hydrophones, has successive sections, each of which contains a subarray of sensor channels, interconnected by a fiber optic signal transmission line via telemetry modules. ...
12/09/1986
4473901Self clocking sampled analog data transmission system
The transmission system of this invention provides for transmitting over a fiber-optic line serially sampled analog data from a plurality of channels. Each sampled analog signal has a interleaved digital pulse. A sequence of digital pulses provides synchr...
09/25/1984
4407020Automatic compensation circuit and method
An automatic compensation circuit for use in a digital switching system. The circuit provides automatic compensation for each incoming channel of a pulse amplitude modulated (PAM) input signal. The circuit generates a compensation data word corresponding ...
09/27/1983
4352179Time domain multiplexing apparatus for multiple microphones
A multiplexer is employed for connecting a plurality of microphones and sending an encoded signal over a single line where it is then decoded, filtered and processed such as by amplification. The multiplexer switches from one microphone channel to the next ove...
09/28/1982
4191856Analog multiplexer
Disclosed is an analog multiplexer in which a plurality of emitter follower differential amplifiers formed of several pairs of bipolar transistors connected in parallel with each other are connected in common to one terminal of a power source through a cu...
03/04/1980
4184052AM/FM time division surface wave device transmitter
A device for sample modulating electronic information signals which includes mixing circuitry having a first input coupled to receive information signals, a second input for receiving electrical sampling signals, and an output for generating thereon elect...
01/15/1980
4161628Technique for tracking amplitude fades for multi-amplitude signalling
Amplitude variations in a multi-amplitude transmission system are tracked by monitoring amplitude variations over a substantial data time span through the use of a technique in which the percentage of time that a maximum-valued reference amplitude is exce...
07/17/1979
4070650Digital signal transmission system and equipment
A digital signal transmission system and equipment therefor in which digital signals sequentially sent out from an encoder side are compared with set values in each of comparators at a decoder side, for sending out signals from the comparators when the va...
01/24/1978
4039948Multi-channel differential pulse code modulation system
A multi-channel differential pulse code modulation system providing communication between a plurality of analog signal sources and corresponding signal sinks employing time shared differential pulse code modulation encoders and decoders....
08/02/1977
4032720Integrated demultiplexing circuit with continuously variable outputs
An integrated circuit has a shift register, driven by a source of clock pulses, for sequentially energizing each of a set of selectively activated switches. Each of the switches connects an analog input signal to the input of an individual sample-and-hold...
06/28/1977
3987249System for addressed timemultiplexed telecommunication
A system for addressed time multiplexed telecommunication comprising subscribers apparatus whose address selector supplies voltage levels which in a central exchange are converted to binary form and stored in address shift registers. Taken out of the regi...
10/19/1976
3979561Level-code encoded multiplexer
Apparatus for multiplexing a large number of digital signals onto a few aog channels using a level code encoded multiplexer. Each digital signal to be multiplexed is assigned a unique reference level to represent a logical "one", with all digital inputs ...
09/07/1976
 
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