Abstract:
A semiconductor means is integrated monolithically on a substrate and comprises at least one power diode (3), its cathode being at a higher potential (6) than the potential (5) of the substrate. Its anode forms the emitter and its cathode forms the base of a parasitic substrate transistor (4). In order to reduce the power loss caused by means of this parasitic substrate transistor (4), means (8) for increasing the collector path resistance (41) of the parasitic transistor (4) are provided.
Abstract:
A process for texturizing bundles of filaments of synthetic high molecular weight materials at high speed, wherein the filament bundle is passed through a feed nozzle and is then brought into contact with a hot gaseous medium which is undergoing a vortical motion and has acquired a vortex angle of from 10.degree. to 70.degree. as a result of passage through a vortex chamber, is then heated by the fluid medium in a downstream tubular chamber and is subsequently fed to an expansion stage to produce the crimp, and apparatus for carrying out this process.
Abstract:
A transistor component is suited for controlling large currents, even given high frequencies. The transistor component includes integrated emitter resistors which are arranged between partial-emitter regions and emitter-metal contacts. The integrated emitter resistors cause a stabilized, uniform current distribution both over the various partial-emitter regions, and within the partial-emitter regions, and bring about an improved current carrying capacity, as well as improved high-frequency properties, particularly in view of the finite magnitude of the extrinsic base resistance.
Abstract:
The power supply system for a motor vehicle, includes a battery; a three-phase generator; a connecting line connecting the terminals of the generator and the battery; a rectifier connected electrically to the generator; a voltage regulator for switching an exciter field of the generator on and off to control a voltage actual value at the generator terminals and producing an average field current in the exciter field to maintain a power supply voltage substantially constant regardless of load and speed; and a circuit device for determining and for partially compensating an undesirable direct voltage drop at the generator terminals resulting from a voltage drop in the connecting line caused by load current. The device for determining and for partially compensating is structured to determine an alternating voltage at the generator terminals produced by an alternating current component in the connecting line. The circuit device for determining and partially compensating the voltage drop can include an integrator connected to a full-wave rectifier and a function generator connected to the rectifier. The integrator, full-wave rectifier and function generator are connected in series between the generator terminals and the battery in the connecting line.
Abstract:
An electronic device is suggested which comprises a signal emitting circuit part (1) and a signal processing circuit part (4), at least one line for supplying the signal processing circuit part (4) with operating current and/or at least one signal input line (6) and/or at least one signal output line being guided to the signal processing circuit part (4) from an external circuit. The device includes at least one filter circuit (7) which is connected to the signal processing circuit part (4) and inserted into the signal line (6). The filter circuit (7) comprises additional damping elements for the associated line (6) for damping interference voltage induced by of external high-frequency fields. The amplitude of the interference voltage is greater, preferably substantially greater, than a linear control range of circuit elements of the signal processing circuit part (4). Damping elements and filter circuits are monolithically integrated together with the signal processing circuit part (4). The teaching of the invention is also to be applied to the signal emitting circuit part (1) insofar as the induced interference voltage influences its signal output.
Abstract:
The invention concerns a method of threading in a thread (1) into a texturing nozzle (2) known as such, and an apparatus for implementing the method. The texturing nozzle is brought from a working position (A) into a threading-in position (B) for threading-in, in which position a treatment chamber (13) provided with slots (12) and located upstream from the outlet opening (14) of the texturing nozzle is subject to a vacuum for sucking in a thread brought to a position in front of the inlet opening (44) of the texturing nozzle.The apparatus for implementing the method comprises a duct (19, 32, 32a, 41, 41a), which can be tilted open, for taking up substantially sealingly against the surrounding atmosphere the treatment chamber (13) of the texturing nozzle (2) provided with slots (12), as well as for taking up a suction device (18, 40) sucking the thread (1) through the texturing nozzle (2).
Abstract:
A process for introducing one or more threads into a texturizing nozzle, in which the texturizing nozzle, together with the inlet member, is first brought into a position in which the thread is led transversely past and in the immediate vicinity of the texturizing nozzle, the thread is sucked against the nozzle with the orifice of the inlet member enlarged, immediately after being sucked against the texturizing nozzle the thread is cut beyond the nozzle so that the cut end is sucked back into the nozzle, the suction supply required for the sucking-in is replaced by pressurized fluid texturizing medium, and the cross-section of the inlet orifice of the texturizing device is reduced to a value advantageous for steady state operation.An apparatus for carrying out the above process, comprising a pivotable texturizing nozzle with an inlet member of variable cross-section, and a suction device which permits the pressure to be reduced, relative to atmospheric pressure, at the inlet member of the texturizing nozzle, is also disclosed.
Abstract:
A controlled main switch, typically a semiconductor switch, is connected in parallel to the load. In accordance with the invention, an auxiliary switch, typically also a semiconductor switch such as a switching transistor is directly connected across the terminals of the load, and with an impedance, for example a resistance, diode, or Zener diode to the main switch, and controlled to switch in synchronism with the main switch, so that the residual voltage across the load due to inherent voltage drop across the terminals of the switch becomes a minimum. Integrated technology may be used, combining preamplifiers and distribution networks in one monolithic chip.
Abstract:
A process for the preparation of novel polyamides, the use of such polyamides for the production of fibers, sheets and moldings, and fibers, sheets and moldings obtainable from such polyamides, are provided.
Abstract:
A fiber containing a longitudinal core (I) of a polymer and a chemically different surrounding sheath (II), wherein said sheath (II) is based on a polyamide containing a sterically hindered piperidine derivative (III) attached to the polymer chain by chemical bonding.