摘要:
A circuitry arrangement for a resonant circuit that may be completely monolithically integrated and electrically tuned has a differential amplifier stage with two transistors T.sub.1,T.sub.1 ' fed by a constant current source I.sub.0 that are differentially loaded at their collectors by a voltage-dependent capacity and inductively loaded in relation to the circuit ground by a pair of emitter followers T.sub.2,T.sub.2 ' with electrically adjustable impedance that act upon the base. To implement the electrically adjustable impedances, transistors with associated resistances are provided (for example a pair of emitter followers T.sub.3,T.sub.3 ' with base pre-resistances R.sub.1,R.sub.1 ') which may be adjusted by control currents (for example I.sub.1 I.sub.1 ') . The voltage-dependant capacity is implemented by transistors T.sub.4,T.sub.4 ' whose short-circuited emitters and collectors are connected so that the circuit node thus obtained is applied to the circuit ground through a voltage source U.sub.1. This circuit arrangement may also be used in a controllable oscillator by interconnecting two resonant circuits in a loop. The output signal of the first resonant circuit is used to control the second resonant circuit and the output signal of the second resonant circuit is inverted and used to control the first resonant circuit. Thus, two signals may be tapped at the outputs of both resonant circuits. The frequency of said signals may be varied by a control voltage and their frequency-independent phase difference equals .pi./2. An advantageous implementation of such an oscillator is obtained by decoupling the output signals of both resonant circuits through two identical output drive stages.
摘要:
Line terminal groups are redundantly present for reliability reasons. The connecting through of the input lines to the switching matrix network can thereby proceed via different signal paths. In order to avoid disturbances during switch-over between signal paths, the appertaining interfaces are provided with compensation memories. The data contained in the compensation memories are written in or read out in a phase-synchronized and frame-synchronized manner with a uniform clock. The uniform clock is acquired from the electronic switching device base clock of the system. Due to transient time distortions and component tolerances, the base clock must be regenerated with the circuit arrangement of the invention before it is applied to the compensation memories.
摘要:
A switching configuration for PCM TDM telecommunication exchange insallations, having a central switching network and individual sub-switching networks is provided.Line groups having duplicated central switching networks connected over two time division multiplex lines and having a sub-switching network and a group control system each are assigned to each other in pairs. The line systems assigned individually to the one and the other of two line groups and which are connected via internal lines in normal operation to the sub-switching networks of their own line group, can be switched over to the sub-switching network of the other line group. No connections are interrupted which were already through-connected before changeover switching or were in the process of being set up, and the internal lines running form the line system of one line group can be switched over singly, i.e. individually to the connection, from its sub-switching network to that of the partner line group. Unseized internal lines are switched over, or also connections in the call phase are through-connected. For new connections, only already switched-over internal lines are available.
摘要:
The switching network is tested by comparison of bit streams coming from the double part switching network parts; other parts of the exchange are tested by parity checking. Evaluation takes place at a central location; when a parity error is found in the transmission in a direction of transmission, the parity bit generated for transmission in the other direction of transmission is falsified.
摘要:
An adjusting device for adjusting a stop lever coupled with a control device of an internal combustion engine. The adjusting device includes a housing having an electric motor which via a worm gear rotates a gear wheel. An internal thread is provided in an inner bore of the gear wheel and is engaged by the external thread of a spindle. The spindle is joined to an actuating sleeve and on one end has struts extending in the axial direction, which protrude into guide grooves of a short tubular portion of the bottom part of the housing and are displaceable therein in order to secure the spindle against rotation. A feeler is slidably disposed in the actuating sleeve and when the stop lever of the control device is in contact with the feeler, the feeler closes switch contacts which communicate via wiper fingers with contact paths, which are disposed on a protuberance which extends into the spindle.
摘要:
A method for the processing of values measured in a gas friction vacuum meter, in which the pressure is determined by the drag on a magnetically suspended free ball, by forming a first time value t.sub.n-1 by measuring the time required for N/2 periods of revolution of the ball, and a second time value t.sub.n by the immediately following measurement of the time required for another N/2 periods of revolution of the ball, determining a pressure value by comparing the two times values, repeating this pressure value determination of two time values after each period of rotation for the same number N of periods of revolution of the ball to a total of z determinations, and displaying the average of the pressure value determined Z times. To be able to determine the pressure with optimum measurement times and uncertainties of measurement, the ratio of N to Z is selected at approximately 4:1.
摘要:
A calibratable voltage divider made by thin-film or thick-film technology formed by a flat film is an ohmic voltage divider resistor connected to have current flow through it. At least one tap is provided to tap off a desired divider voltage. The ohmic voltage divider resistor includes a single, coherent first resistance zone (10), which has one area for supplying current and another for taking current away, each being connected with a respective connection conductor (11, 12). The tap is made in the form of a second resistance zone (13) connected with the first resistance zone (10) between the current supply, and current drainage areas, and a take-off electrode (14) is attached to the second resistance zone (13). As needed, one or two cuts (16, 17), which intersect the equipotential lines are made to partially separate the second resistance (13) from the resistor (10) zone extended far enough that the potential attains the desired value at the take-off electrode (14) of the tap. The cut is so placed with respect to the coherent resistance zone that its length, or extent, hardly affects the resistance of the coherent zone between the current supply and drainage areas.
摘要:
A pane with an electrical connection element is described. The pane can have a glass substrate and an electrically conductive structure on the substrate. Solder material can be used to electrically connect a connection element to the electrically conductive structure.
摘要:
A method for bending a sheet is described. The method includes the following steps: a) at least one sheet is inserted into a pre-bending ring with a movable bending ring holder, the movable bending ring holder is moved into a furnace and the at least one sheet is heated to softening temperature and is pre-bent to 5% to 50% of a final edge bending, b) the at least one sheet is lifted by means of a suction device and is bent further, beyond the bending obtained in the pre-bending ring, c) the at least one sheet is laid down by means of the suction device in a final-bending ring on the movable bending ring holder and is bent to the final edge bending, and an area pre-bending of the at least one sheet is performed by means of thermal irradiation, d) the at least one sheet is lifted out of the final-bending ring by means of a second suction device, pressed against an opposing mould and bent, and the at least one sheet is laid down on the final-bending ring and the at least one sheet is cooled down.
摘要:
A combination of an interconnect board and a module board for connecting a plurality of electronic modules to a processing unit is described. The interconnect board comprises a plurality of interconnect data lines connected between a plurality of interconnect board input terminals and interconnect board output terminals. The module board comprises at least one electronic module connected to a module connection input terminal, a plurality of module board data lines connected between a plurality of module board input terminals and a plurality of module board output terminals, and an unconnected module board output terminal. A first one of the interconnect board output terminals is connectable to the module connection input terminal, and the unconnected module board output terminal is connectable to one of the interconnect board input terminals.