Abstract: A miniaturized or chip-type HF magnetic-coil arrangement, e.g. a toroidal core transformer, comprising a basic body (1) of plastic material, which is provided with openings for magnetic cores (2), the upper side (10) and the lower side (11) of said basic body (1) including electric conductors (5) and the interior thereof being provided with plated-through holes in openings (16) to which the conductors (5) are connected in such a way that individual turns around the magnetic core are formed, said turns defining windings of coils (6, 7). Moreover, methods are provided, which permit a production of these arrangements in large numbers of pieces.

Abstract: An apparatus may be connected to the temperature probe by means of a cable, and houses the display device, the electronic circuit, the voltage source, and the switches. The electronic circuit comprises a voltage multiplier, a control circuit, a supply circuit for supplying a highly constant voltage, a bridge circuit comprising four highly constant resistances, and a thermistor as temperature sensor, a voltage divider circuit for adapting the voltage generated by the bridge circuit, and an integrated circuit providing a 3-1/2 position digital-voltmeter which directly operates the display device.