Abstract: A circuit arrangement for the display of a cursor symbol of variable magnitude addresses the cursor memory by means of a separate addressing device which operates only during display of the cursor field. The organization of the memory for the cursor symbol, constructed as a matrix memory, is fully independent of the rows and columns of the cursor field, i.e. to the cursor symbol the memory appears as a pure linear memory. As a result, this memory can be utilized in a substantially improved manner and the display of even large cursor symbols requires only a limited storage capacity.

Abstract: A sequence of m-bit information words is converted to a modulated binary signal. For each received information word from the sequence an n-bit code word is delivered. The delivered code words are converted to the modulated signal. When one of the code words is assigned to an information word to be converted, this code word is selected from a set of code words that depends on a coding state which is related to a digital sum value at the end of the modulated signal that corresponds to the previously delivered code word. From at least one of the digital sum values, a first or a second coding state of a pair of coding states of a first type is determined. Which of the two coding state of the pair is determined depends on the information word that corresponds to the previous delivered code word. The sets of code words belonging to the pairs of coding states of the first type contain no code word whatsoever in common.

Abstract: A controller for supplying a switching signal to a switched mode power supply, includes a sinusoidal-like wave generator, and circuitry for selectively shifting a dc level in the sinusoidal-like wave whereby a duty cycle of the sinusoidal-like wave at a predetermined threshold level, corresponding to a turn-on level of a power switch in the switched mode power supply, is effectively controlled.

Abstract: A recording and/or reproducing apparatus which accepts two different sizes of magnetic-tape cassettes each having two juxtaposed reels comprises four drive means mounted stationarily in the apparatus and each comprising a reel spindle and a reel disc. Both the reel spindles and the reel discs are axially movable and, when a magnetic-tape cassette is loaded into the apparatus this cassette is detected by means of the reel spindles which are not adapted to enter into driving engagement with this cassette. The reel spindles and the reel discs which are not adapted to enter into driving engagement with this cassette are moved into an area situated outside the area occupied by the inserted magnetic-tape cassette by the cassette housing.

Abstract: A circuit arrangement comprising a tuner and a splitter-modulator, the latter made up of a splitter and a modulator, the splitter having an RF signal input for receiving an RF input signal, an RF signal output for supplying an RF output signal, and a first line for applying the RF input signal to the tuner. A second line is provided for supplying an RF output signal from the modulator. The tuner is adapted to demodulate the RF input signal and the modulator is adapted to, convert a baseband signal into the RF output signal to be supplied by the modulator. Devices for generating reference oscillations for the tuner and the splitter-modulator have one quartz crystal which is common to the tuner and the splitter-modulator. This results in a reduction in the number of components, particularly for generating the oscillations.

Abstract: A measuring device for determining the displacement of a movable object includes a graduation element which is mechanically connected to the object whose displacement is to be determined. The graduation element comprises at least a track which is formed by a plurality of successive grating strips located transversely to the direction of movement of the object. The measuring device also includes a radiation source, a detector and a reflective optical system which comprises at least a beam collimating element. The reflective optical system guides the radiation from the radiation source to the graduation element and changes it to an elongate radiation beam which is parallel on average in the cross-section perpendicular to the grating strips.

Abstract: Apparatus for recharging a battery includes a compartment for accommodating the battery in a manner such that its electrical terminals are in contact with a pair of electrodes. The electrodes are connectable to respective poles of a controllable source of electrical energy. A strain gauge is positioned so as to make contact with a wall of the battery when the battery is in place in the compartment. The strain gauge includes a foil which carries a resistive element, each of the two extremities of the resistive element being connected to an electrical device via a separate contact wire, whereby the coefficient of thermal expansion of the strain gauge is substantially equal to that of the wall of the battery. The material of one of the contact wires, at its juncture with the resistive element, has a different Seebeck coefficient to the material of the other contact wire at its juncture with the respective element.

Abstract: A folding stage for a folding analog-to-digital converter includes a plurality of consecutive reference terminals providing ascending different reference voltages, a first summing node, a second summing node and a first output node. A plurality of differentially coupled transistor pairs wherein each of the pairs has a first transistor having a main current path and a control electrode which is coupled to an input terminal (IT) for receiving an input voltage to be folded and a second transistor having a main current path and a control electrode which is coupled to a respective one of the consecutive reference terminals. The main current path of the first transistor of the consecutive transistor pairs is coupled alternately to the first summing node and the second summing node, and the main current path of the associated second transistor is coupled alternately to the second summing node and the first summing node.

Abstract: The application describes a network comprising transceivers (1..6) linked in a network topology. The positions of the transceivers in the network topology are changed in dependence on the loads on the end-to-end connections (VC1..VC5) between the transceivers in the network. A configuration is chosen to give efficient use of the capacity available in the network. Each time that a new end-to-end connection (VC) within the network is set up the positions of the transceivers (1..6) are changed such that the network remains optimized.

Abstract: A magnetic resonance apparatus includes a magnet system (2) for generating a steady magnetic field (H) in a measuring space (28), an RF receiver circuit (10, 14, 16) with an RF receiver coil (10) for receiving RF signals emitted by an object arranged in the measuring space, a monitor (22) with a liquid crystal display (LCD) display screen (44) for image display, and a central control unit (18) which is connected to the RF receiver circuit and to the monitor for control in such a manner that information is applied to the LCD display screen. In order to prevent disturbing RF signals, produced by the monitor (22), from affecting the information obtained via the RF receiver circuit (10, 14, 16), the central control unit (18) is arranged to control the monitor in such a manner that information is applied to the LCD display screen (44) only during periods in which the RF receiver circuit is not activated.

Abstract: An MR imaging method and device in which an object to be examined is displaced at a defined speed relative to an examination zone and a plurality of sequences act on the examination zone in the presence of a steady, uniform magnetic field, each of the sequences including at least one RF pulse and possibly a phase encoding gradient, and a MR signal arising in the examination zone, after transposition to another frequency range by means of an oscillator signal, is used to produce an MR image. The method aims to enhance the quality of the MR image produced by preventing movement artefacts. This is achieved in that from one sequence to another, one or more of the frequency of the RF pulses, the frequency of the oscillator signal, and the phase position of the oscillator signal is adjusted in conformity with the position of the object to be examined relative to the examination zone so that a part of the object which is imaged in the MR image moves relative to the examination zone in synchronism with the object.

Abstract: Flat-panel type picture display device having a face plate with a luminescent screen at the inner side and, arranged at a short distance therefrom, a rear plate adjoined by a large number of electron transport ducts operating by means of wall interaction of electrons. An active selection structure for directing electrons from transport ducts towards pixels on the luminescent screen comprises an apertured preselection plate and an apertured fine-selection plate, each preselection aperture being associated with at least two fine-selection apertures. Special auxiliary (or dummy) electrodes between the preselection plate and the selection plate, and/or a special geometry of the preselection apertures ensure that colour purity and contrast are maximal.

Abstract: Method of polishing a surface (5a) of a noble metal or an alloy comprising mainly noble metal, in which a polishing means is moved across the surface while exerting a polishing pressure for obtaining a plane and smooth polished surface without any defects. A composition comprising demineralized water with 20 to 40% by weight of an organic liquid comprising a poly-alcohol or a derivative thereof, for example, glycerol, and particles which can be encapsulated and have a Knoop's hardness of between 5 and 50 GPa, for example Al.sub.2 O.sub.3 grains, is used as a polishing means.

Abstract: Epitaxial layers of II-VI semiconductor compounds having low incidence of lattice defects such as stacking faults are produced by first depositing a fraction of a monolayer of the cation species of the compound, followed by depositing a thin layer of the compound by migration enhanced epitaxy (MEE). Growth of the remainder of the layer by MBE results in much lower defects than if the entire layer had been grown by MBE. Layers are useful in devices such as LEDs and injection lasers.

Abstract: A variable length decoder device receives a stream of variable-length encoded data segments for successive transient storage. The storage is recurrently accessed under control of successive pointers. A decoder is fed by the storage and decodes a stream of data segments each from a respective encoded data segment. Furthermore, in step with the decoding a next pointer is produced as being directly derived from the accessing through reading of a localizer information. The latter again is produced in a preprocessor that sits before the storage, through localizing the data segments and indicating each segment by an associated localizer.

Abstract: A lighting unit according to the invention comprises an electrodeless low-pressure discharge lamp 20 provided with a discharge vessel 20 enclosing a discharge space 20 with an ionizable filling in a gastight manner. The discharge vessel 20 has a recessed portion 23 and an enveloping portion 23 which transmits radiation generated in the discharge vessel. Means are present in the recessed portion for initiating and maintaining an electric discharge in the discharge space. The means comprise a member for generating an electric field in the discharge space. The recessed portion is provided with a luminescent layer, which is subdivided into mutually separated regions, at a surface facing the discharge space. The lighting unit further comprises a supply unit for supplying the means. The lamp of the lighting unit according to the invention has a comparatively low ignition voltage.

Abstract: A magnetic multilayer device (1) comprising two layers (3, 5) of magnetic material which are separated by an interposed layered structure comprising a resonant-tunneling double-barrier structure (RTDBS) (7). In such a device (1), exchange coupling between the magnetic layers (3, 5) can be modified by subjection of the RTDBS (7) to an electric field. In this way, the configuration of the magnetisations (M.sub.1, M.sub.2) in the magnetic layers (3, 5), and thus the net magnetic flux generated by the device (1), can be electrically adjusted. The device (1) can be applied inter alia in a magnetic recording head.

Abstract: An air circulation heating apparatus, for example a hair drier or an electric radiator, is controlled by an infrared sensor which measures at a distance the thermal radiation emitted by an object heated by the apparatus. The sensor is placed in the flow of hot air to ensure reliable operation of the apparatus and to ensure that the sensor supplies correct measurement data. A screen is provided adjacent the sensor in the path of the airflow which prevents the flow of hot air from hitting the sensor directly.

Abstract: A magnetic resonance (MR) method utilizes a plurality of inductively coupled receiving coil systems quasisimultaneously to measure a nuclear magnetization distribution in an examination zone. The method involves excitation of the nuclear magnetization in an examination zone, exposed to a uniform, steady magnetic field, by means of at least one RF pulse, multiple rephasing of the exited nuclear magnetization in order to generate a plurality of MR echo signals whose number at least equals the number m of receiving coil systems, and switching over the receiving coil systems in such a manner that, subsequent to said excitation, each receiving coil system receives at least one MR echo signal while at the same time alii respective other coil systems are inactive.

Abstract: Semiconductor device for the microwave frequency ranges includes a semiconductor element of the "flip chip" type which comprises a semiconductor substrate having an active surface with at least one integrated circuit, a plurality of metal input-output pads and a circuit of transmission lines of the coplanar type having conductor strips and ground metallizations disposed on the active surface. A circuit of transmission lines of the microstrip type with conductor strips disposed on a surface opposed to the active surface and whose ground metallizations are formed by the ground metallization of the active surface. A base plate comprising an insulating substrate having a front surface with a plurality of metal input-output pads and ground metallizations patterned so as to be in electrical contact with the ground metallizations of the active surface of the semiconductor element when the latter is bonded to the base plate.