Abstract: An optoelectronic semiconductor device (100) includes a laser (10) which emits a first radiation beam (80) with a first wavelength (.lambda..sub.1) at one side (50) and which forms a radiation waveguide (3) for a second radiation beam (90) with a second wavelength (.lambda..sub.2) greater than the first wavelength (.lambda..sub.1), which second beam can enter the laser (10) at said side (50), and a photodiode (20) present at the other side (60) of the laser (10), aligned with the laser (10), and sensitive to radiation of the second wavelength (.lambda..sub.2).

Abstract: An integrated circuit, includes an output stage with an input which is coupled to a first and a second gate of an NMOS transistor and a PMOS transistor, respectively, and an output which is connected to a first and a second supply terminal via the PMOS transistor and the NMOS transistor, respectively. The output is coupled to the first gate via a series connection of a Miller capacitor and a switching circuit. The Miller capacitor limits the rate of increase of the voltage on the output, thus preventing interference. The switching circuit is rendered non-conductive ahead of the switching over from logic low to logic high. This prevents sudden discharging of the Miller capacitor which would otherwise cause interference itself.

Abstract: A receiving device comprises a pseudo-random generator (18) initialized by a control word (CW) and a memory card reader (19). In accordance with the invention, it reads control word in a table of numbers contained in a read-only memory of a memory card (17) by utilizing a mode which is chosen from among several different modes, receives from the transmitter a signal which indicates the choice made in respect of said mode at a given instant.

Abstract: A method of processing a digital image in order to construct a calculated image, termed the target image (I*), which represents a so-called source image (I) reconstructed with modifications to the tilting angle, panning angle and scale factor in relation to this source image. This method includes determining a common view point (P), for the source image (I) and the target image (I*), as the origin of an orthonormal reference frame; and calculating, for every pixel (M*) with address (X*, Y*) in the target image (I*), spherical coordinates (.alpha., .beta.) by a linear function G.sup.-1 such that (.alpha., .beta.)=G.sup.-1 (X*Y*), the coefficients being functions of the modified tilting and panning angles and scale factor. Finally, the method includes reading a pair (X, Y) which is stored in a table and which constitutes the address of a point (M), in the source image (I), corresponding to the pixel (M*) in the target image (I*), by the matching, to the resolution of the table, the spherical coordinates (.

Abstract: For detecting pulsatory interference in a sampled audio signal, the value of a given signal sample is compared with the values of previous as well as subsequent signal samples within a selected time window. If the given sample, multiplied by a selected attenuation factor, exceeds a certain percentage of all such samples, that identifies it as an interference pulse. It can then be replaced by an interpolated sample value derived from adjoining samples over a selected interval of the signal.

Abstract: An arrangement for producing a digital signal from an input (e.g., analog) signal obtained from a transmission medium. The arrangement includes a variable equalizer for equalizing the input signal as regards magnitude and phase as a function of frequency to produce an equalized signal, an equalizer control signal generator for generating first and second control signals for controlling the variable equalizer and a detector for producing the digital signal from the equalized signal. The arrangement further includes a bit array selector (i.e., a bit sequence detector) for generating one or two selection signals upon detection of one or more specific bit arrays (i.e., bit sequences) in the digital signal, and a sample-and-hold unit which samples one or more portions of the equalized signal under the influence of the one or two selection signals so as to produce at least one first sample value and at least one second sample value.

Abstract: A power generator, including a transformer with a primary winding arrangement and a secondary winding arrangement which is inductively coupled thereto, the primary winding arrangement forming a resonant circuit in conjunction with a capacitor, and a load being connected to the secondary winding arrangement. Therein, one winding arrangement of the transformer forms part of a series resonant circuit and, the other winding arrangement forms part of a parallel resonant circuit, the resonance frequency of the series resonant circuit is lower than the resonance frequency of the parallel resonant circuit, and the primary winding is connected to an alternating voltage generator so that an essentially sinusoidal alternating current flows through the primary winding.

Abstract: A chip card including a card base with a recess. A circuit support and a microcircuit is arranged on a circuit support surface which faces an interior of the recess and is spaced from the recess bottom. A raised portion is formed on the recess bottom and spaced from a cover section so as to divide the recess into two regions bounded by the recess bottom, the cover section and the raised portion. The first region is completely filled with an encapsulant and the second region is partly filled with the encapsulant.

Abstract: An X-ray window for an X-ray component such as an X-ray detector. Windows of this kind must be as thin as possible so as to minimize X-ray absorption. The known material polypropylene is not available in the desired thickness of the order of 1 .mu.m, and stretching of this material so as to reduce the thickness causes an inadmissible spread in thickness. The material polyethylene naphthalate (PEN) in accordance with the invention is available in the desired thickness and with a much smaller spread in thickness. Furthermore, the window material should exhibit suitable mechanical properties (such as strength, rigidity and tightness) which are not allowed to degrade significantly under the influence of continuously varying circumstances in respect of pressure, temperature and X-rays. In comparison with the known polyethylene terephtalate (PET), PEN in this respect has better properties which satisfy the mechanical requirements.

Abstract: Video images are encoded by transform coding, resulting in data blocks each including a DC-coefficient and a plurality of AC-coefficients. The coefficients of a number of said transform blocks are variable-length encoded and transmitted. In order to avoid a complete loss of datablocks in case of a transmission error, the most significant codewords of a group of blocks are transmitted first so as to achieve that at least the DC-level of the blocks is likely to be retained. The coefficients may also be recorded on a videorecorder. Fast playback of recorded images so encoded, leads to very poor quality because some data blocks are not being read in the search mode. To improve this quality the DC-coefficients and if desired predetermined AC-coefficients of selected ones of the transform blocks to be recorded on one track are packed together to form a DC-packet and such packet is recorded on a selected part of the track.

Abstract: A method, oven, and device for heating a strip-shaped carrier in an oven, which carrier is passed through the oven by a transport device, while the oven is displaced in a direction opposed to the transport direction when a malfunction is detected in the supply or removal of the strip-shaped carrier.

Abstract: A device for the detection of objects in a sequence of images. The device having a means for registering images, means for increasing the contrast of objects within a registered image, means for increasing the contrast of moving objects between two registered images and means for a final selection of signals considered as corresponding to the objects to be detected.

Abstract: Chemical substances are provided which exhibit thermally induced spin transitions between two stable spin states at ambient temperature, said transitions being associated with a hysteresis phenomenon and resulting in an abrupt variation of the color of the molecules for realizing a medium for storing, processing and/or displaying information by way of thermal writing, optical reading and thermal erasing, a particular embodiment of such a medium comprising at least a layer of chemical substances including a lattice with a molecule comprising a metallic element Fe.sub.(II), or Fe.sub.(III) or Co.sub.(II) associated with at least one ligand chosen from the substituted triazoles which are defined by the formula: ##STR1## in which R is H or an alkyl C.sub.n H.sub.2n+1 or R is an amine group NL.sub.2 where L is H and an alkyl radical, said molecule also comprising one or several anions chosen, for example, from BF.sub.4.sup.-, ClO.sub.4.sup.-, Br.sup.-, Cl.sup.

Abstract: A method is disclosed for recording picture information, in which pictures (2) on an image carrier (3) are scanned and converted into a picture information signal, the picture information signal being converted into a coded picture, which is recorded on a record carrier (184). For a plurality of scanned pictures the information signal is converted into n independently coded pictures (TV/16, TV/4, TV) for each picture scanned, n being greater than or equal to two. The resolutions of the picture representations defined by these n coded pictures are different. For each of said plurality of scanned pictures (2) the associated coded pictures (TV/16, TV/4 TV) are recorded on the record carrier (184). Moreover, a picture retrieval and reproduction device (11) for reading the record carrier (184) thus obtained is disclosed.

Abstract: A method is proposed for determining approximations of eigenvectors of a covariance matrix associated with signal data on the basis of the Principal Component Transform. Successive iterations on estimates enhance the development into the direction of the principal component considered. The method is applicable to the Singular Value Decomposition of data matrices. The operations to be performed are similar to those required in a neural net for adapting the synaptic coefficients, Apparatus are proposed for performing the method.

Abstract: A magnetic field sensor includes a number of magnetoresistive sensor elements situated in one plane, and which have the same privileged directions of magnetization, and a magnetization coil connected to a current pulse generator which alternately supplies the magnetization coil with opposite current pulses to generate a magnetic field which extends parallel to the privileged directions of the sensor elements and is strong enough to reverse the direction of internal magnetization thereof The magnetization coil includes an electrically insulating substrate which supports an approximately spiral-shaped electric conductor track including a group of parallel arranged active conductor elements. An electric current flows through the conductor track in the same direction in all active conductor elements of the relevant group.

Abstract: A reversible tape cassette drive includes a support plate which is displaceable with respect to the magnetic tape and is also pivotable about a pivot axis. By pivoting the support plate, a selected one of two pressure rollers is driven against a corresponding capstan to control the direction of tape movement. The magnetic head is pivotally mounted on the support plate about the pivot axis. Straight guides guide the head to be perpendicular to the tape independent of the pivoting of the support plate.

Abstract: A urological examination apparatus, includes a patient table at the foot of which there is provided a sink which serves to collect fluids and which is provided with a drain. The sink is pivotable about a horizontal shaft which extends perpendicularly to the longitudinal direction of the table.

Abstract: When the processing circuitry of a signal processor can handle data at a faster rate than the rate of arrival of signal units to be processed, the processor is able to execute a cycle of microcodes for each arriving signal unit. To generate the cycle, the signal processor contains base address reproducing means, for in each cycle reproducing a standard sequence of successive base addresses BA(i) (i=1 . . . N). The base address reproducing means feed microcode selecting means for selecting, in step with each base address and under control of signal data received from the processing circuitry, an associated microcode address MA(i) from a repertory of microcode addresses indicated by the base address BA(i). Selection is implemented by adding each base address BA(i) to an associated index IA(i), determined in dependence on signal data received from the processing circuitry.