Conti Temic Microelectronic Gmbh

Temic Telefunken Microelectronic Gmbh

Temic Automotive Electric Motors Gmbh

Temic Semiconductor Gmbh

Ferdinand Friedrich

Hans-Joachim Fach

Matthias Gramann

Gerhard Hettich

Bernhard Schuch

Peter Robitschko

Wolfgang Thiel

Reinhard Orthmann

Werner Wiedemann

Hubert Trageser

Michael Bruhnke

Hermann Pirner

Friedrich Nehmeier

Thomas Rupprecht

Gunther Bichlmaier

Dietrich Von Knorre

Bernhard Dilz

Rainer Ertel

Reiner Doefler

Thomas Schencke

Udo Teubert

Thomas Susemihl

Dieter Grafje

Viktor Dano

A circuit board () has a top face () for positioning an electronic component and a bottom face () used as a support on a heat-dissipating base. A plurality of heat transfer holes () provide heat transfer from the top face () to the bottom face (). The heat transfer holes () are unevenly or non-uniformly distributed on the top face () in such a way that the top face () is provided with several free sectors () which are free of heat transfer holes () in order to connect the electronic component to the circuit board (). The free sectors () are configured as columns or lines. A plurality of heat transfer holes () are placed at least along the long sides of the free sectors (). The circuit board has a low thermal resistance between the electronic component and the heat-dissipating base.

Printed circuit board

An electric drive unit includes an electric motor for driving a fan. The motor has an electronic control module. An impeller wheel for producing a working air flow is mounted by bearings on an axle of the electric motor. The hub of the impeller wheel has at least one preferably two walls enclosing a cooling space or cooling space portions. At least one cooling surface of a cooling body is in contact with components of the electronic control module and projects into the cooling space. A gap formed between the hub of the impeller wheel and a carrier section communicates with an inner hub space. Holes () communicating with the hub inner space are provided in at least one component of the electric drive unit. When the impeller wheel rotes a convection cooling air flow is established between the gap and the holes.

Electric drive unit

The method of cryptological authentification in a scanning identification system comprising a base station, which supplies energy via the alternating field to a transponder connected to the object to be identified, includes the following method steps. For essentially the entire communication between the base station and the transponder, the base station generates an inquiry signal. Upon receiving the inquiry signal transmitted by the base station, the transponder responds with an identification number stored in its memory. The base station then encodes a first bit sequence it has generated by using a key bit sequence that is allocated to the identification number of the transponder, and transmits the second bit sequence obtained in this manner to the transponder. When the second bit sequence is received, the transponder generates a checking bit sequence from the second bit sequence, and, following the complete reception of the second bit sequence, transmits this checking bit sequence to the base station. The checking bit sequence serves to verify the correct reception of the second bit sequence. For cryptographic authentification, the transponder encodes the first bit sequence reconstructed from the second bit sequence using the key bit sequence allocated to the transponder, and transmits the third bit sequence obtained in this manner to the base station. While the transponder is still encoding the second bit sequence to form the third bit sequence, the base station uses the checking bit sequence to verify whether an error has occurred in the transmission of the second bit sequence, and may abort the ongoing encoding in the transponder. This can abort the ongoing authentification, because a valid result cannot be anticipated. Thus, time is gained at the start of a new running of the authentification method.

Method of cryptological authentification in a scanning identification system

A process for monitoring an opening of an enclosed space by an IR alarm system, wherein: a measuring process is generated whereby a modulated IR beam is emitted by at least one IR emitting element of an optoelectronic unit in the form of a pulse and the beam reflected from marginal areas of the opening is detected as a measurement signal by at least one IR receiving element of the optoelectronic unit, with the directional characteristic of th IR beam being matched, by optical components in the path of the beam, to the opening being monitored; the measurement signal detected by the receiving element is compared with a mean value of the previous measurement signals, and a normal operating mode of the alarm system is initiated if there is an approximate correlation between the measurement signal and the mean value, or an alarm operating mode of the alarm system is initiated if there is a significant deviation between the measurement signal and the mean value; in the normal operating mode, the next measuring process is generated after a pause in time, during which the control unit, emitting element and receiving element are switched off; and, in the alarm operating mode, a number of measuring processes are generated in immediate succession and compared with criteria stored in the control module, and an alarm signal is tripped if the measurement signals from the measuring processes correspond with the stored criteria.

Process for monitoring the openings to an enclosed space

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Heroldsberg, Germany

Ferdinand Friedrich