Siemens Aktiengesellschaft

Deutsche Itt Industries Gmbh

Sonke Mehrgardt

Karlheinz Hafner

Thomas Hilpert

Heinrich Pfeifer

Dietmar Ehrhardt

A carrier element in card form has at least one integrated semiconductor circuit disposed on the carrier element. External terminals of the data carrier card have a terminal surface disposed on an edge surface of the carrier element. Further terminal surfaces are preferably provided on main surface areas of the carrier element for an external terminal. If a plurality of data carrier cards are laid congruently one on top of the other, an electrical connection between the external terminals of the respective data carrier cards is established in a simple way.

Data carrier card, assembly of at least two data carrier cards and

Portable data carrier configurations with non-volatile semiconductor memories serve as rapid-access storage media for data processing systems. It is possible for a multiplicity of such data carrier configurations to be operated on a bus system. The data carrier configurations preferably contain a microprocessor which, for example, automatically creates an index file of files stored in the data carrier configuration and also searches for certain terms and actively or passively reports a search result on request from a PC or a microprocessor provided in a receiving adapter for the data carrier configurations.

Portable data carrier configuration to be operated on a data bus and

Sound channel circuit for digital television receivers

A television receiving section includes only a single A/D converter, and, thus, only a single interface between the analog portion and the digital portion. Preferably, the A/D converter is positioned after the intermediate-frequency stage of the television receiving section. The A/D converter is clocked at about 20 MHz. The digital portion of the television receiving section includes a video channel and an audio channel. The video channel includes at its input end a band-pass filter whose passband extends from 1 MHz to 6 MHz and whose output signals are fed directly and through a 90.degree. phase shifter to a first absolute-value stage, which delivers the digital composite color signal. The audio channel includes at its input end a quadrature mixer (operating from a locally generated clock having a frequency of 7 MHz to 7.5 MHz) whose two output signals are fed through a first decimator and a second decimator, respectively, to a second absolute-value stage and an angle-computing stage. The output of the angle-computing stage delivers a frequency-demodulated audio signal through a differentiating stage. The output of the second absolute-value stage provides an amplitude-demodulated audio signal.

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March, Germany

Sonke Mehrgardt