| Patent application number | Description | Published |
|---|
| 20080284635 | TRANSDUCER DEVICE - A transducer device for converting an analog DC voltage signal into a digital signal is provided, with an oscillator device for outputting a first oscillator signal and a second oscillator signal, whereby the oscillator device is formed to generate the first oscillator signal and the second oscillator signal phase-locked to one another and with the substantially same frequency from a reference signal, with an analog frequency converter connected to the oscillator device for transforming the analog DC voltage signal by the first oscillator signal in a first spectral range with a first center frequency to obtain a transformed signal, with an analog-to-digital converter for converting the transformed signal into a transformed digital signal; and with a digital frequency converter connected to the oscillator device for transforming the transformed digital signal by means of the second oscillator signal in a second spectral range with a second center frequency to obtain the digital signal. | 11-20-2008 |
| 20090206925 | RECEIVING CIRCUIT AND METHOD FOR RECEIVING AN AMPLITUDE SHIFT KEYING SIGNAL - A receiving circuit and method for receiving an amplitude shift keying signal is provided. At least one exponent signal, an exponent-removed in-phase signal, and an exponent-removed quadrature-phase signal are generated from an in-phase input signal and a quadrature-phase input signal. An amplitude is determined as a sum of several summands, whereby the summands are determined from the exponent signal and/or from the exponent-removed in-phase signal and/or from the exponent-removed quadrature-phase signal (Q′), and wherein the amplitude (A) is demodulated. | 08-20-2009 |
| 20100124890 | CIRCUIT FOR A LOOP ANTENNA AND METHOD FOR TUNING - A circuit for a loop antenna having a first antenna terminal and a second antenna terminal with an antenna impedance, and method for tuning an overall impedance that has an antenna impedance of a loop antenna and a tuning impedance, with an output amplifier for amplifying a transmit signal that has an output for connection to the first antenna terminal of the loop antenna, with a tuning device designed for automatic tuning that has a terminal, which is separated from the output of the output amplifier for connection to the second antenna terminal, in which the tuning device has an adjustable tuning impedance that is connected to the terminal, in which the tuning device has a measurement device that is connected to the tuning impedance in order to measure a voltage amplitude across the tuning impedance, in which the tuning device has a computing unit that is connected to the measurement device and the adjustable tuning impedance, and in which the computing unit is designed for automatic adjustment of the tuning impedance based on evaluation of the voltage amplitude and the tuning impedance. | 05-20-2010 |
| 20100215131 | CIRCUIT, USE, AND METHOD FOR CONTROLLING A RECEIVER CIRCUIT - A circuit, use, and method for controlling a receiver circuit is provided, wherein a complex baseband signal is generated from a received signal, a phase difference between a phase of the complex baseband signal and a phase precalculated from previous sampled values is determined, the phase difference is compared with a first threshold, a number is determined by counting the exceedances of the first threshold by the phase difference, a number of the counted exceedances is compared with a second threshold, and the receiver circuit is turned off if the number of counted exceedances exceeds the second threshold within a time period. | 08-26-2010 |
| 20100232547 | CIRCUIT AND METHOD FOR CONTROLLING A RECEIVER CIRCUIT - A method for controlling a receiver circuit and circuit with a receiver circuit and with a control circuit is provided, whereby a received signal is demodulated and filtered. An amplitude value of the demodulated and filtered signal is compared with thresholds of a window comparator. A zero crossing of the demodulated and filtered signal is compared with time thresholds of a time window by a comparison unit. A first output value of the window comparator and a second output value of the comparison unit are logically combined, and wherein, via the logical combination, the receiver circuit is turned off if, within a period of time, the amplitude value is determined to be outside a window formed by the thresholds of the window comparator, or a zero crossing is determined to be outside the time window. | 09-16-2010 |
