Infineon Technologies Ag

Infineon Technologies LLC

Dieter Sewald

Marc Tiebout

Bernhard Lustig

Peter Klein

J&ouml;rg Berthold

In an interface circuit for connection to an output of a frequency converter, at least two current paths are coupled to one another in parallel. Each current path includes at least one cascode stage for signal processing. The circuit compensates for DC voltage offsets of the frequency converter, and has a gain ratio that can be changed over for signals with a large dynamic range.

Interface circuit for connecting to an output of a frequency converter

An oscillator/mixer circuit having a reduced area requirement when producing it on a chip and where the circuit's mixer circuit is not based on the use of the nonlinear characteristic curve of an active component. The preferred embodiment of the oscillator/mixer circuit comprises an oscillator circuit; a mixer circuit, wherein the oscillator and mixer circuits have the same components to some extent and wherein the mixer circuit has at least a first switch element and a second switch element. An output of the first switch element is coupled to a control input of the second switch element via a first feedback element. An output of the second switch element is coupled to a control input of the first switch element via a second feedback element. The feedback elements are set up allow oscillator operation of the oscillator/mixer circuit.

Oscillator/mixer circuit having reduced area requirement when produced on a chip

The coil and coil system is provided for integration in a microelecronic circuit. The coil is placed inside an oxide layer of a chip, and the oxide layer is placed on the substrate surface of a substrate. The coil comprises one or more windings, whereby the winding(s) is/are formed by at least segments of two conductor tracks, which are each provided in spatially spaced-apart metalization levels, and by via-contacts which connect these conductor track(s) and/or conductor track segments. In order to be able to produce high-quality coils, a coil is produced with the largest possible coil cross-section, whereby a standard metalization, especially a standard metalization using copper, can, however, be used for producing the oil. To this end, the via contacts are formed from a stack of two ore more via elements arranged one above the other. Parts of the metalization levels can be located between the via elements.

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Bruckmuhl, Germany

Dieter Sewald