Abstract: A rotary scanning device having a stationary upper and lower drum (1,2) is proposed, in which a cylindrical insert (15) with a servo head (16) is arranged in a radial bore (14) in the lower drum (2). The cylindrical insert (15) is secured to the circumference of a ring (18) which is concentrically supported in the lower drum (2) and which has an axial groove (19) in its circumferential surface for the adjustment of the angular position of the ring (18).

Abstract: A display device comprising electron-transport ducts having entrance apertures for electrons and means for generating electrons and injecting electrons into the transport ducts via the entrance apertures. Measures have been taken to improve the picture quality. For example, the location of the entrance aperture is not the same for each transport duct, but instead shows a variation. This enables an improved control of the electron flow in the transport ducts to be achieved; in particular crosstalk between the transport ducts can be reduced.

Abstract: Electrically insulating surfaces of a cathode ray tube are covered with a film of an organic material (211). This improves the high-voltage behavior of the cathode ray tube. The film is applied by a method in which a solution comprising an organic material is applied, which is allowed to dry and is subsequently caused to decompose partly.

Abstract: A laminated structure (1) comprising a substrate (3) and a polymer layer (5) is provided. The polymer layer consists of conductive areas (7) having a sheet resistance of maximally 1000 .OMEGA./square. The adjacent parts of the polymer layer are substantially non-conductive and have a sheet resistance which is a factor of 10.sup.6 higher. An electrodeposited metal layer (9), for example of copper, is present on the conductive areas (7).A simple method of photochemically generating the conductive pattern (7) which can be reinforced in an aqueous metal-salt solution by electrodeposition of a metal layer (9) is also provided and most preferably the conductive pattern is inter alia, the patterned exposure of a layer of 3,4-ethylene dioxythiophene or polyaniline. The method can very suitably be used for the manufacture of metal patterns on insulating substrates, such as printed circuit boards.

Abstract: Subband coding a digital signal having a first and a second signal component in a stereo intensity mode. The digital signal is subband coded to produce a first subband signal having a first q-sample signal block in response to the first signal component, and a second subband signal having a second q-sample signal block in response to the second signal component, the first and the second subband signals being in the same subband, and the first and second signal blocks being time-equivalent. The first and second signal blocks are processed to obtain a minimum distance value representative of a distance between a line and a plurality of points if (a) the points correspond to the respective pairs of time-equivalent samples in the first and second signal blocks, and are plotted in a coordinate system, and (b) the line is plotted such that it traverses the origin and the points at a minimum distance from the points in the coordinate system.

Abstract: With a semiconductor memory cell (particularly but not exclusively in a thin-film device) having a non-volatile memory transistor (Tm) as a driver transistor, an adequate difference in output signal (I) can be derived from the cell for the different states of the memory transistor (in spite of poor transistor characteristics,) thereby permitting the assembly of a large number of such memory cells in an array (100). Each memory cell includes a load (TI) driven by the non-volatile memory transistor (Tm). In the different memory states of the memory transistor (Tm) a difference in signal occurs at a node (30) between the memory transistor (Tm) and the load (TI). Each cell also includes a switch (To) which is coupled to the node (30) and switched from one output state to another by the signal at the node (30). The output state of the switch (To) provides the output signal (I) from the cell.

Abstract: An illumination unit comprises an electrodeless low-pressure discharge-lamp and a high-frequency power supply unit. The lamp has a gastight closed discharge vessel with an ionizable fill and a coil with turns of a primary and a secondary winding around a core of soft-magnetic material. The power supply unit has input terminals, a first output terminal, electrically neutral with respect to ground, that is connected to a first end of the primary winding, and a further output terminal that is connected to a second end of the primary winding. During nominal lamp operation the primary winding excites a high-frequency magnetic field that maintains an electrical discharge in the discharge vessel and that induces in the secondary winding a potential drop in the direction of a first, with respect to the electrically neutral end, to a second free end that varies in a sense opposite to the potential drop from the first to the second end in the first winding.

Abstract: An interface system for a television receiver includes an interface connector having a plurality contacts connected to various component circuits in the television receiver. In order to provide various functions for the television receiver, the interface system includes various circuit boards each having a plug connectable with the interface connector. The plug includes a number of contacts equal to or less than the plurality of contacts in the interface connector. Depending on the desired function, the circuit board further includes circuits for providing the function, these circuits being interconnected and connected to the appropriate contacts in the plug for connecting with the appropriate component circuits in the television receiver. The interface system allows the television receiver functions to be modified and/or updated without the need for opening the television and modifying the circuits and/or the wiring to the circuits.

Abstract: A piezoelectric sensor system according to the invention employs a piezoelectric actuator relay (20) having a piezoelectric element displaceable in response to an actuation voltage and contacts (23, 24) which open or close in accordance with the displacement of the element, wherein the actuator relay (20) is adapted to receive a force (L) to be measured against the displacement. This piezoelectric actuator relay (20) is supplied, by a driver circuit (60), with a varying voltage as the actuation voltage. The relation between the forces (L) and the activation voltages necessary for opening or closing the contacts (23, 24) has been stored in a memory (70). A processor (50) obtains a value of the force (L) based on a value of the actuation voltage at the instant of the opening or closure of the contacts (23, 24) and the relation stored in the memory (70).

Abstract: The invention relates to a device for generating announcement information. When the complete announcement information is generated via natural speech information, a large storage capacity is required. The device aims to enable a plurality of different announcement information to be generated without requiring a large storage capacity. To this end, there is proposed a device for generating announcement information including an input unit, a storage unit for storing natural speech information, a speech generator for generating synthetic speech information and a multiplexer for combining the natural speech information and the synthetic speech information to form the announcement information.

Abstract: An amplifying circuit includes a low gain amplifier having positive and negative inputs and an output. A high impedance path provided by, for example, a low gain unity buffer amplifier feeds from the negative input to the output of the amplifier a first voltage (KV.sup.+) equal to a second voltage (V.sup.+) at the positive input of the amplifier multiplied by the reciprocal of the open loop gain (A.sub.OL) of the amplifier. This circuit simulates a unity gain buffer amplifier having a high input impedance and a high open loop gain using a low open loop gain amplifier and a feed forward arrangement. The use of a low gain amplifier avoids the need for large area transistors and the resultant large parasitic capacitances and so facilitates high speed operation.

Abstract: In a modern television apparatus, the settings are generally realized by menu-calling sequences in which different menus successively appear on the display screen. Finally, a variable is retained and it is possible to increase or decrease its value by way of a pair of "+" and "-" keys (13), respectively. The last variable which has been set by the sequence of menus can now be set again after such a sequence and without having to run through this sequence again if the "normal" keys (13) are subsequently used. Moreover, additional "+" and "-" keys (15) having about the same function may be provided: the variable to be set by means of the keys 13 and 15, respectively, will be the one which has been set by way of the same keys during a previous sequence of menus.

Abstract: An amplifier including a first output transistor (T2a) and a second output transistor (T3a) having the same polarity and arranged in push-pull configuration, and an input transistor (T1a) whose collector is coupled to the base of the first output transistor (T2a). The amplifier also includes a third output transistor (T2b) and a fourth output transistor (T3b) which are also arranged in push-pull configuration, and a supplementary input transistor (T11b) whose emitter is coupled to the emitter of the input transistor (T1a) and whose collector is coupled to the base of the second output transistor (T3a) and to the base of the third output transistor (T2b), the base of the fourth output transistor (T3b) being coupled to the collector of the input transistor (T1a).

Abstract: A rotary-anode X-ray tube including a sleeve bearing with a stationary and a rotatable bearing portion having facing bearing faces, at least one of which is provided with a groove pattern, has a lubricant which is liquid at least in the operating condition present between the bearing faces. A reduction of bearing wear is achieved by addition of a solid having a low sliding friction to the lubricant.

Abstract: A video decoder including a control unit (CC), a picture memory (P) and a loop filter (F) for blockwise decoding of coded video pictures (q). The blockwise decoding generally leads to artefacts in the display of the decoded video pictures on a monitor (M), which artefacts can be substantially suppressed by filters arranged downstream of the decoder. A similarly substantial suppression of the artefacts with a small extension of the number of components is characterized by means with which the control unit (CC) is enabled, in the decoding intervals,(a) to read predetermined pixel data of a decoded video picture from the picture memory (P) and to apply them to the loop filter (F) for the purpose of filtering,(b) to select the predetermined pixel data in such a way that the filtering operation is performed beyond the block edges of the blocks provided for decoding. The measures described are compatible with a decoder as defined in the H.261 Recommendation.

Abstract: This circuit includes an arrangement which modulates the horizontal velocity of the spot as a function of the video contents with the aid of a supplementary horizontal deflection coil. This arrangement essentially includes a video signal differentiator followed by an amplifier which supplies a current to the supplementary deflection coil. The current generated by the amplifier has a threshold (S) for the input signal, and a quasi-plateau for input signals beyond 25%. The difference between this current and the current which would be generated by a linear amplifier (broken-line curve) is concerned in this case. This difference, for example for an input voltage of 50%, is referred to as reserve (R). A trap filter is inserted upstream of the amplifier in the arrangement, which filter is centered on the chrominance subcarrier frequency and has a depth which is equal to about the value of the reserve.

Abstract: A phase-locked loop includes an input terminal (1) for receiving a binary signal, a phase comparator (3) having a first input (2) coupled to the input terminal (1), having a second input (4), and having an output (5) coupled to an input (9) of a control-signal-controlled oscillator (10) via a control-signal generator unit (7). An output (11) of the oscillator is coupled to the second input of the phase comparator. The phase comparator derives a first pulse (P.sub.1) and a second pulse (P.sub.2) in response to a signal transition from a first value to a second value in the binary signal applied to the first input and an oscillation signal applied to the second input, the first pulse having a pulse width which is a measure of the phase difference between the binary signal and the oscillation signal, and the second pulse having a pulse width proportional to 1/2.f.sub.o, where f.sub.o is the frequency of the oscillation signal.

Abstract: A CDMA transmission system wherein a data sequence which is to be transmitted is frequency band spread by multiplying the data words therein by selected code words. In order to minimize the necessary bandwidth, a frame structure is established and the spread spectrum data words are compressed into data bursts each of which is included in one or more time slots of a data frame. Within a frame a data burst is located at a particular time delay t.sub.0 following commencement of the frame and has a duration t.sub.d corresponding to the bit rate of the data burst.

Abstract: In the manufacture of a large-area electronic device (e.g. an active-matrix liquid-crystal display or other flat panel display), a TFT of improved lifetime stability results from the inclusion of a field-relief region (22) which is of lower doping concentration than the drain region (12) and which is formed in an area (2) of lateral separation between the channel region (21) and the drain region (22). An energy beam (40), e.g. from an excimer laser, is used to provide the field-relief region (22), by laterally diffusing the doping concentration of the drain region (12) along an area (2) of the semiconductor film (20) significantly larger than the thickness of the semiconductor film (20). The method is simple and easily controllable, an advantageous doping profile (FIG. 3b) is obtained along the field-relief region (22) by this lateral diffusion.

Abstract: Uniform electrically conducting multicomponent material is deposited on an electrically conducting substrate by means of a PCVD method. A plasm, for example a glow discharge plasm, a high frequency plasm or a microwave plasm is generated in a reaction space. The plasma is periodically reciprocated. Starting materials for the single components of the multicomponent material are added to a flowing gas phase. To obtain multicomponent material of the desired composition, the flowing gas phase is split into at least two flowing gas phases each comprising only starting materials for a single component of the multicomponent material. The separate gas phases are time sequentially applied to the plasma. The deposited multicomponent material my be subjected to a thermal treatment.