Abstract: The invention relates to a transponder that transmits measurement values that does not have an energy source of its own, which draws energy from a radio field and that includes a novel input circuit to demodulate the high frequency. The novel circuit facilitates using the transponder for digital identification and measurement purposes respectively with a high level of efficiency. Intelligent coupling of a conventional full wave diode rectifier with an inductivity and a switching element, advantageously a MOSFET providing power for a digital circuit is facilitated as well as providing power for an analog quartz sensor, herein the power is always conducted into the path where it is required. Additionally the quartz sensor arrangement is activated or deactivated at will by precisely one switching element and an increased output voltage for the digital circuit is generated by smart modulation of the high frequency feed signal using the inductivity.

Abstract: Conventional real-time spectrum analyzers have a degree of technical complexity in the hardware which increases disproportionately as the analysis bandwidth increases for Fourier transformations of the measured sampling values. When using high analysis bandwidths, a detailed resolution is not needed of each analyzed individual frequency on the time plane at the same time; instead, detection of the presence of short pulses can be important as well. For this application, mixing sampling values on the time plane using a variable auxiliary frequency allows the sampling rate to be reduced, in that the bandwidth is maintained but a compression is carried out on the time plane. A very high time resolution which far exceeds the capabilities of conventional real-time spectrum analyzers can additionally be achieved overall for the analysis bandwidth, the time resolution then being computationally assignable to the individual frequencies for signal forms, in particular pulses, which occur in practice.

Abstract: The invention relates to a transponder that transmits measurement values that does not have an energy source of its own, which draws energy from a radio field and that includes a novel input circuit to demodulate the high frequency. The novel circuit facilitates using the transponder for digital identification and measurement purposes respectively with a high level of efficiency. Intelligent coupling of a conventional full wave diode rectifier with an inductivity and a switching element, advantageously a MOSFET providing power for a digital circuit is facilitated as well as providing power for an analog quartz sensor, herein the power is always conducted into the path where it is required. Additionally the quartz sensor arrangement is activated or deactivated at will by precisely one switching element and an increased output voltage for the digital circuit is generated by smart modulation of the high frequency feed signal using the inductivity.

Abstract: Conventional real-time spectrum analyzers have a degree of technical complexity in the hardware which increases disproportionately as the analysis bandwidth increases for Fourier transformations of the measured sampling values. When using high analysis bandwidths, a detailed resolution is not needed of each analyzed individual frequency on the time plane at the same time; instead, detection of the presence of short pulses can be important as well. For this application, mixing sampling values on the time plane using a variable auxiliary frequency allows the sampling rate to be reduced, in that the bandwidth is maintained but a compression is carried out on the time plane. A very high time resolution which far exceeds the capabilities of conventional real-time spectrum analyzers can additionally be achieved overall for the analysis bandwidth, the time resolution then being computationally assignable to the individual frequencies for signal forms, in particular pulses, which occur in practice.

Abstract: The invention relates to a method for producing anellated carbo- or heterocyclic aromatic compounds, which is based on the reduction of the corresponding diketone as starting compound. The reduction agent is thereby used in a strong molar excess, which represents a significant simplification in implementation of the method relative to the methods known from prior art.

Abstract: The invention relates to a system for wireless power transmission, which makes it possible to generate an increased voltage on the receiver side using a radio signal that is optimized for this purpose and thereby permits operation particularly of digital semiconductor components in the receiver even if the receiver does not have a power supply of its own.

Abstract: An apparatus for wire-free transmission of at least one measured value, from moving parts, is for measuring the tire pressure in motor vehicles, and includes: a measured value transmitter, in particular a pressure meter in the tire; a measurement system, which includes at least one antenna in the vicinity of the measured value transmitter, as well as at least one electronics assembly, in which case, at least one supply frequency is produced in the measurement system and is emitted to the measured value transmitter and is received from it. Further, the measured value transmitter includes at least one resonator coupled to at least one non-linear electronic component, and the resonator is influenced by the value to be measured. Multiples of the supply frequency or sum or difference frequencies of a plurality of supply frequencies are formed in the non-linear electronic component by mixing or forming harmonics.