Abstract: A programmable high frequency active filter comprises a plurality of basic building blocks connected in parallel. A basic building block includes a transistor pair connected in a differential amplifier configuration, an impedance connected between the emitters of the transistors and a switching block for applying the necessary bias current to the transistors. The transfer function of the filter is programmed with a digital word, the length of which determines the number of basic building blocks included in the configuration. In this way, the equivalent high frequency impedance of the filter is controlled by selecting the configuration and the value of the impedance of each building block.

Abstract: A known servo-drive including a stator which is formed with two-component design or the exciter winding has to be attached directly to the stator, which is associated with a costly production method. The new servo-drive is to permit easy and cost-effective manufacture with favorable actuation properties. The stator of the servo-drive includes in the region of the poles, weak points which are formed either by recesses or by gaps. An induction core includes a winding which is inserted into a yoke constructed on the stator by which a magnetic field can be induced in the stator. The alternating combination of sheet-metal laminas having gaps and recesses permits the torque/rotary angle characteristic of the servo-drive to be optimized with favorable production properties. The servo-drive for rotary angle adjustment of an actuator is used for example to control the opening cross-section of a medium-conducting flow line in internal combustion engines for the purpose of controlling idling speed.

Abstract: A current steering switch circuit responsive to a CMOS signal. In an specific embodiment the switch is incorporated in a hybrid BiCMOS multiplexer circuit using combined CMOS and CML/ECL signal types. The high speed CML/ECL logic signals are multiplexed under the control of a lower speed CMOS signal. A particular aspect of the circuit is that a CMOS to CML/ECL converter is not used. Additionally, a differential, logic commutation signal is not required.

Abstract: A method for positionally securing two components together, in which a hollow body is introduced into the two components. Once the final position of the components relative to one another has been established, the hollow body is driven directly into the second component with the application of axial pressure and sonic energy. The method is suitable for employment with thermoplastic components whose relative position to one another is known beforehand, an example being in the assembly of housing parts of a rotary adjuster for controlling a flow cross section in internal combustion engines.

Abstract: A protein comprising at least a first functional site having the ability to bind the cap structure of mRNA and a second functional site having the ability to bind a solid support matrix in such a manner as to allow the first functional site to be immobilized and still remain functionally accessible to interact with the cap structure of mRNA. Also within the scope of the present invention is a method for generating a cDNA library mostly containing full-length cDNAs. The method comprises the incubation of a mixture comprising mRNA:cDNA hybrids with 1) a single strand RNA specific nuclease and 2) the above-mentioned protein. The resulting mixture is then passed through a column comprising a support matrix having the ability to bind the second functional site of the above-mentioned protein in order to selectively bind complete mRNA:cDNA hybrids. The mRNA:cDNA hybrids are then competitively eluted with a cap analog and full-length cDNA strands are separated and recovered.