| Patent Number |
Title Of Patent |
Date Issued |
| 5870498 |
Method of processing image data for transmission, and use of this process |
February 9, 1999 |
| Image data representing successive original images is prepared for transmission by comparing the characteristics of an image data portion associated with each image region of each original image with the characteristic of the image data portion of the same image region of the immedia |
| 5794183 |
Method of preparing data, in particular encoded voice signal parameters |
August 11, 1998 |
| Method of preparing data, in particular voice signal parameters for transmission at a low bit rate, identical signal parameters are combined interval by interval in quantized form; forfurther bit reduction, bits are suppressed from the total number of bits of at least two intervals, the |
| 5691987 |
Frequency-channel multiplexer and demultiplexer |
November 25, 1997 |
| A circuit of low complexity which selects arbitrary channels from a plurality of multichannel input signals and generates from a plurality of individual frequency channels a plurality of output signals whose channel composition can be freely selected, consists of a plurality of bandpass |
| 5684788 |
Method of providing a frame clock for data signals in a communications network and switching dev |
November 4, 1997 |
| The method of providing a frame clock for data signals in a communications network includes determining phase positions (P1, P2, . . . ) of respective frame clock information (RT1, RT2, . . . ) of incoming data signals with respect to frame clock information (RTN) available at a swit |
| 5666212 |
Method of coding image segments of any shape |
September 9, 1997 |
| A method of coding digital image data of an original image for transmission and reproduction. The original image is subdivided into partial image regions whose shapes are adapted to local image structures. For each partial image region, a set of two-dimensional, lineraly independent basi |
| 5663773 |
Demodulator for a complex-value vestigial sideband signal |
September 2, 1997 |
| In a demodulator for a complex-value vestigial sideband signal, a Nyquist slope filter which consists of two subfilters (Ra, Ia) is used, a filter device (FBASTP) being connected downstream of, or also capable of being integrated in, the said Nyquist slope filter, in order to suppress |
| 5638073 |
Method of linearizing variations in the transfer characteristic of a D/A converter, as well as a |
June 10, 1997 |
| A method is provided for linearizing variations in a transfer characteristic of a digital-to-analog (D/A) converter to which a digitized input signal is fed for being converted to an analog output signal. The method includes balancing the D/A converter so that essentially only negati |
| 5633860 |
Reliablity-controlled data reception in receivers for TDMA mobile radio systems |
May 27, 1997 |
| A method for reliability-controlled data detection of TDMA data bursts with a central test sequence for determining the identification parameters of the transmission channel, wherein: the data segments adjoining the test sequence at both ends are subdivided into N sectors A.sub.i, i=.+-. |
| 5625418 |
Method and arrangement for inserting frame markers in data for transmission and for retrieving t |
April 29, 1997 |
| For the preparation of data such as digitized television channel signals or television channel bundles, useful data are periodically replaced by a frame marker (F) in at least one of N parallel partial data streams of different bit significance. For this replacement, a partial data strea |
| 5615208 |
Kalman filter for channel impulse-response adaption in receivers for TDMA mobile radio systems |
March 25, 1997 |
| A method for adaptation to the time-variable channel impulse response during a burst in receivers for TDMA mobile radio systems, each burst including in the center a test sequence which is known to the receiver and by means of which an initial estimate of the channel impulse response is |
| 5610562 |
Waveguide absorber |
March 11, 1997 |
| A waveguide absorber which withstands high mechanical and thermal loads is typified in that a member (4) exhibiting absorber material is clamped between waveguide walls (5, 6) in such a way that at least one wall region (5) adjoining the member (4) is constructed flexibly, and that a for |
| 5601731 |
Process for the production of an optoelectronic component having a defined axial variation of th |
February 11, 1997 |
| The process for production of an optoelectronic component having a predetermined coupling coefficient distribution and a predetermined phase shift distribution includes providing a photomask defining lateral and axial geometry of the grating fields of the optoelectronic compound, par |
| 5600741 |
Arrangement for coupling optoelectronic components and optical waveguides to one another |
February 4, 1997 |
| The arrangement for coupling optoelectronic components and optical waveguides to one another includes a carrier substrate (11); at least one optoelectronic component (9) or one optical waveguide (1) secured on the carrier substrate (11) and at least one lens (8) provided with an esse |
| 5594393 |
Microwave line structure |
January 14, 1997 |
| A microwave line structure which has a first conducting track applied onto a substrate and a second conducting track which extends, supported on posts, at a distance above the first conducting track, a coplanar line being arranged, in addition to the microstrip line formed by the first |
| 5579154 |
Optical fiber amplifier |
November 26, 1996 |
| The invention relates to an optical fiber amplifier having an amplification waveguide, having a pump source and having a wavelength-selective coupler. The pump light from the pump source is coupled into the amplification waveguide via the coupler. A carrier substrate (GS) is provided, on |
| 5578973 |
Waveguide multiplexer/demultiplexer |
November 26, 1996 |
| The waveguide multiplexer/demultiplexer includes a rectangular collecting waveguide provided with a short-circuit plane at one end thereof and elements for coupling the collecting waveguide to tunable waveguide filters arranged on opposing sidewalls, which are tunable to different fr |
| 5577142 |
Optical fiber transmitting and receiving communications device |
November 19, 1996 |
| In the case of the above devices, exact adjustment is very important; however, the devices ought to be very compact. It is not sufficient to utilize the silicon etching technique for the precision. The optical transmitting element (LD) is situated on a first carrier (T1), the optical |
| 5570137 |
Device for digital demodulation of video and audio elements of television signal |
October 29, 1996 |
| A device for digital demodulation of the video and audio elements of a television signal has a digital preprocessing stage for conditioning a complex digital signal for digital demodulation of a television signal at intermediate frequency, a first complex mixing device shifting the video |
| 5568369 |
Method for operating a voltage converter, and a voltage converter and its application |
October 22, 1996 |
| In a voltage converter for switching mode, for example a push-pull voltage converter (GW), during a starting operation the switching-on pulses for the switching elements (S1, S2) are dimensioned to be of different length, specifically in such a way that the mean value of the energy-consu |
| 5568206 |
Device for processing modulated rail analog television signal |
October 22, 1996 |
| A device for processing a modulated real analog television signal has a digital preprocessing stage for conditioning a complex digital signal for digital demodulation of a television signal at intermediate frequency. The digital signal preprocessing is carried out such that subsequent |
| 5566264 |
Laser module including grooved silicon substrate, isolator and optical fiber |
October 15, 1996 |
| The laser module couples its semiconductor laser to an optical device, e.g. an optical fiber, particularly a monomode fiber. The laser module includes a micromechanically structured silicon substrate (31) provided with an elongated groove (30) having a longitudinal axis by an anisotropic |
| 5541672 |
Device for digital demodulation of video and audio elements of television signal |
July 30, 1996 |
| A device for digital demodulation of the video and audio elements of a television signal has a digital preprocessing stage for conditioning a complex digital signal for digital demodulation of a television signal at intermediate frequency, mixing devices for video and audio elements of t |
| 5530471 |
Radio and television distribution system |
June 25, 1996 |
| A distribution system, useful with radio and television distribution, for distributing a signal having a plurality of channels includes a central station. The central station produces a first frequency division multiplexed signal in which signals from a plurality of channels or chann |
| 5517082 |
Traveling wave tube heating coil power supply with varying frequency AC current limiting means |
May 14, 1996 |
| A power supply for supplying the heating coils of a tube (WR), in particular a traveling-wave tube, wherein a transformer (Tr) and an inverter (S1, S2) are provided in the heating circuit of the tube (WR), and the frequency of the AC current is reduced from a high initial value to a |
| 5461612 |
Drop-and-add multiplexer for converting and processing a frequency multiplex signal |
October 24, 1995 |
| A drop-and-add multiplexer for receiving an incoming FDM signal with a plurality of channels, for receiving signals of additional channels, and for outputting an outgoing FDM signal. The multiplexer includes at least one single channel filter for receiving an incoming FDM signal, filteri |
| 5438500 |
Switching regulator with a push-pull resonance converter |
August 1, 1995 |
| A switching regulator having a series resonance push-pull converter (GW) and two clocked boost regulators (AR1, AR2) connected in series with the converter, wherein: the converter comprises a transformer (Tr) having two primary windings (w1, w2) which are galvanically isolated from one |
| 5428323 |
Device for compensating for temperature-dependent volume changes in a waveguide |
June 27, 1995 |
| A waveguide assembly includes a waveguide having walls defining a cavity; and a frame surrounding the walls of the waveguide. The frame has a coefficient of thermal expansion less than that of the waveguide. First and second connecting spacers are attached to and project away from op |
| 5369487 |
Device for determining the amplitude of the spectral lines in the output signal from a ring inte |
November 29, 1994 |
| An arrangement for determining the amplitudes of spectral lines contained in the phase-modulated output signal of an optical ring interferometer which are suited to determine the angular velocity with which the ring interferometer is rotated, for which a digital evaluation circuit is |
| 5337315 |
Stuffing process for reducing waiting time jitter and device for executing the process |
August 9, 1994 |
| A stuffing process and device for reducing waiting time jitter by: determining the mean loading of an elastic memory as precisely as possible; determining a loading error constituted by a difference between an actual value and a set value of the mean loading; producing a sum of succe |
| 5313502 |
Arrangement for imaging a useful signal from the frame of a first digital signal at a first bite |
May 17, 1994 |
| A circuit arrangement for imaging a useful digital signal from a frame of a first digital signal having a first bit rate into a frame of a second digital signal having a second bit rate, where the useful digital signal had been written into a first elastic memory and then read out of the |
| 5306975 |
Vibration insulation of a body on magnetic bearings |
April 26, 1994 |
| A device for insulating a body on magnetic bearings from vibration of its stator and hence the environment and vice versa. The body may include a rotor which can produce undesirable vibrations during rotation. The position of the body is caused to follow slow movements of the stator, but |
| 5289503 |
Method and circuit arrangement for producing a QPSK signal on which a carrier signal is superpos |
February 22, 1994 |
| A method of generating a composite signal in the form of a QPSK signal on which an additional carrier signal is superposed, wherein a carrier signal is conducted through two series connected, switchable phase shifters. One of the phase shifters is controlled by one of two data signals. B |
| 5263057 |
Method of reducing waiting time jitter |
November 16, 1993 |
| A method of recovering an original digital signal, after pulse stuffing, with reduced waiting time jitter. The original digital signal is written into a first elastic memory in a synchronizer. A pulse stuffed output of the synchronizer is transmitted to a desynchronizer where bits of the |
| 5192906 |
Switching regulator with current limiting shutdown |
March 9, 1993 |
| A switching regulator employing pulse width control or pulse frequency control of an actuator includes a current limiting device which receives a signal that is a function of current through the actuator and a signal that is a function of turn-on pulses for the actuator. The actuator is |
| 5185642 |
Improved method and arrangement for processing output signals of a fiber ring interferometer |
February 9, 1993 |
| A method and circuit arrangement for determining angular velocities by means of an optical fiber ring interferometer includes, in addition to, a phase modulator for modulating light waves passing through an optical fiber ring of the interferometer at a phase modulation frequency f, and a |
| 5182745 |
Data transmission method and arrangement |
January 26, 1993 |
| For the transmission of data in the form of difference signals between subscribers connected to a bus, bus couplers are provided which permit switching between transmit and receive operation. The bus couplers each include a multiplexer connected in such a manner that, for receive ope |
| 5177700 |
Non-recursive half-band filter |
January 5, 1993 |
| A non-recursive half-band filter having a filter length N and complex coefficients for receiving either a real input signal s(kT) or a complex input signal s(2kT) and for processing and converting the received input signals into either a complex output signal s(2kT) or a real output sign |
| 5157698 |
Method for clock pulse synchronization |
October 20, 1992 |
| A method of synchronizing clock pulses of a clock pulse generator used in a receiver of digital data transmissions. The received signal is demodulated by multiplying it in quadrature by an output signal of a carrier oscillator to obtain demodulated in-phase and quadrature components. The |
| 5128635 |
High power ferrite circulator having heating and cooling means |
July 7, 1992 |
| A high power, high frequency, Y-junction three port circulator containing at least one metal plate in the Y-junction covered with ferromagnetic material and an external magnet producing a magnetic field through the ferromagnetic material so that it is magnetized to saturation magneti |
| 5122687 |
Symmetrical Exclusive-Or gate, and modification thereof to provide an analog multiplier |
June 16, 1992 |
| An Exclusive-Or circuit has a symmetrical arrangement of components in order to provide an identical input impedance for both input signals and to provide identical switching and signal propagation times. The circuit includes input stages (EF.sub.1, EF.sub.2 ; EF.sub.3, EF.sub.4) for |
| 5103220 |
Method of expanding a three-stage regular switching array |
April 7, 1992 |
| A method of expanding a regular three-stage switching array. Original switching blocks of the first and third stages having a smaller number of crosspoints are enlarged to switching blocks having a larger number of crosspoints, by combining the original switching blocks. In addition, the |
| 5095416 |
Push-pull converter current limiter |
March 10, 1992 |
| Method and apparatus for output current limitation of a push-pull d.c. voltage converter. The input current of the push-pull d.c. voltage converter is detected and integrated each switching cycle of push-pull switches in the current paths leading to the transformer of the converter. |
| 5075654 |
Resonator tuning arrangement |
December 24, 1991 |
| A ferrite tuning arrangement for a resonator includes a ferrite loaded line in the form of a stripline having an inner conductor, an outer conductor and a ferrite disposed between the inner and outer conductors, with the stripline being adapted for coupling to the resonator. A reflecting |
| 5068817 |
Non-recursive half-band filter with complex valued coefficients for complex input and output sig |
November 26, 1991 |
| A non-recursive half-band filter having a filter length N includes a receiver unit for receiving a complex input signal having a real component and an imaginary component at a sampling frequency fA, where fA=1/T; and a processing and converting unit for processing and converting the rece |
| 5031197 |
Timing error detector |
July 9, 1991 |
| The invention relates to a timing error detector for clock pulse synchronization in a receiver for synchronous data transmission. The timing error detector receives, as the demodulated received signal, the in-phase component and the quadrature component from the product of the receiv |
| 5029331 |
Method for editing a convolutional code for transmission and its reconversion at the receiver as |
July 2, 1991 |
| A method and apparatus for editing a high-convolutional code for transmisison and its reconversion at a receiver using code puncturing n-output bit streams of a convolutional encoder. The device includes parallel switched data rearrangers at the transmitter provided with control swit |
| 5018819 |
Method for centering and mounting a light waveguide in a sleeve, and apparatus for use in the me |
May 28, 1991 |
| A light waveguide such as a monomode fiber is inserted into a bore in a body of ductile material, and is mounted and centered using a deformation punch having individual needles which can be moved independently of one another. This provides an improvement over a conventional technique, i |
| 5015872 |
Method and circuit arrangement for generating a phase shifted clock pulse signal |
May 14, 1991 |
| A method and apparatus of generating a clock pulse signal, which is shifted by any desired, settable phase value between 0 and -.pi. by using two conventional phase shifters which can be set continuously between 0 and -.pi./2, wherein the two input ports of the first phase shifter are fe |
| 5012390 |
Mounting and connection system for electrical communications equipment |
April 30, 1991 |
| A mounting and connection system for electrical communications equipment of the type including a plurality of plug-in modules which are each provided with electrical components and with multi-pin connectors, and which are inserted from the front into a magazine whose rear face is provide |
| 5001413 |
Method of operating a switching regulator and apparatus therefor |
March 19, 1991 |
| A switching regulator including a direct voltage source for producing an input voltage, an electronic switch connected between the voltage source and an output for switching the input voltage to the output, a pulse width modulator connected for controlling the electronic switch, a sawtoo |
