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Class 375/372 - Elastic buffer


Subclass of Class 375 - Pulse or digital communications
Definition: Subject matter wherein a first in-first out (FIFO) storage
No. of patents: 621
Last issue date: 05/22/2012


                    16  
NumberTitleIssue Date
4823365Synchronization method and elastic buffer circuit
An asynchronous communication system includes a clock recovery circuit (2) to which the received signal (1) is applied and which provides recovered data (3) to a frame delimiter detector (4). The frame delimiter detector in turn generates a frame start si...
04/18/1989
4811340Synchronization of asynchronous data signals
In a synchronous network, asynchronous data signals are synchronized using positive/negative stuffing under the control of stuff request signals which are produced in dependence upon the phase difference between the asynchronous and synchronized data sign...
03/07/1989
4796281Digital signal transmission system
A digital signal transmission system which converts first digital signals having a given bit rate into second digital signals having a predetermined bit rate to transmit them. The first digital signals are written into a buffer memory at a bit rate of the...
01/03/1989
4764942Slip control in a plesiochronous buffer circuit to reduce distortion of two kinds of data signals
For a buffer memory used in a plesiochronous buffer circuit for reception of a PCM signal at station clocks and transmission thereof at satellite clocks, first and second partial write control arrangements control writing of first and second parts of each...
08/16/1988
4716575Adaptively synchronized ring network for data communication
In a ring communication system, data is received by and retransmitted by a plurality of network interface units spaced along the ring. Each network interface unit includes an elastic storage buffer which is preferably less than two bits in length. A feedb...
12/29/1987
4712225Phase quantizer apparatus
Phase quantizer apparatus in an all digital phase locked loop to provide a two-part digital number representing the phase of the input signal (a noncontinuous pulse train) relative to the output signal of the all digital phase locked loop. The phase quant...
12/08/1987
4661966Method and apparatus for adjusting transmission rates in data channels for use in switching systems
Two data equipments are connected by switching equipment which supplies high speed lines for a modified data signal and a stuff control signal. A system clock or system clock derived signal is used in a stuffing pattern generator which generates a stuff c...
04/28/1987
4596026Asynchronous data clock generator
A circuit and method for generating a substantially smooth clock for clocking asynchronous data to a user device. Incoming asynchronous data is stored in an elastic buffer such as a first-in first-out memory. Periodically, an output identifiable bit is re...
06/17/1986
4580279Elastic store slip control and maintenance circuit
In an elastic store synchronization system, failures in the slip control circuitry or the elastic store itself are determined by employing a slip maintenance circuit. To this end, parity written into the elastic store is scrambled in a prescribed manner. ...
04/01/1986
4558455Data transmission system
In the modem based data transmission system the transmitting section provides a bit from each terminal (DTE) to be stored into a transmission buffer register (BX) under the control of an external clock signal derived from a modem internal transmission clo...
12/10/1985
4525849Data transmission facility between two asynchronously controlled data processing systems with a buffer memory
In order to avoid unambiguous logic switching statuses in a data and control path upon transfer from one clock system of an outputting data processing system into an independent, asynchronous clock system of an accepting data processing system, and wherei...
06/25/1985
4434498Process and apparatus for synchronization of digital signals
A digital signal formed from successive words representing quantized samples of sound information and comprising silent periods is synchronized with a local reading clock. For that, the words are stored in a random access memory as they arrive, they are r...
02/28/1984
4393279Digital data transmission system having frequency or phase modulated data carrying signals to provide supervisory channel
A supervisory channel is provided on a digital transmission system by frequency modulation of the data signal transmitted along a transmission link which includes repeaters. The frequency modulation can be carried out using an elastic store. Each repeater...
07/12/1983
4392234PCM Signal interface apparatus
A PCM signal interface apparatus comprises a buffer memory being capable of asynchronously writing and reading a PCM signal, means for inserting a frame marker to the PCM signal upon writing the PCM signal into the buffer memory, means for judging whether...
07/05/1983
4374305Arrangement for regenerating start-stop signals and dial pulses
Described is the regeneration of dial pulses in the signalling system CCITT type B. The dial pulses are regenerated by a combined regeneration process comprising a reduced process with two sampling instants (10 ms, 30 ms) and an inverse process with four ...
02/15/1983
4353130Device for processing serial information which includes synchronization words
A data stream is received from a medium. This stream consists of synchronization words and data words. The synchronization words are either identical or one the inverse of the other when they are correctly received. Between two synchronization words a fix...
10/05/1982
4181975Digital delay line apparatus
Apparatus is illustrated for delaying in increments of infinitesimally small electrical angles the data bits in a data stream using an addressable elastic buffer which is addressed by a phase lock loop used to compare the output data with a reference. The...
01/01/1980
4054747Data buffer
A data buffer makes use of a plurality of buffer storage cells into which serial bit streams are sequentially written, in order to obtain correction for phase jitter. A write clock signal is derived from the serial bit stream and is used to sequentially w...
10/18/1977
4049910Digital signal transmission system
A transmission system of the kind comprising, on emission, a code converter for coding said signals into variable length words according to their occurrence probabilities, the word rate being determined by an emission clock, a synchronizing word generator...
09/20/1977
4027100Code transmission system having buffers of approximately equal capacities on both transmitting and receiving sides
A buffer memory of a transmitter stores, for transmission at a predetermined transmission rate, synchronization codes produced regularly, buffer occupancy codes immediately following the respective synchronization codes, and information codes produced bet...
05/31/1977
4021609System for regenerating a data from a burst signal which is received and processing said data with a local clock and the circuit for carrying out the same
In the receiving terminal of a PCM (Pulse Code Modulation)-TDMA (Time Division Multiple Access) system, a data is demodulated from a received burst signal, said data is written in a buffer register by using a burst clock which is regenerated from the rece...
05/03/1977
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