Frequency modulator and frequency modulation method
AssigneeInfineon Technologies AG
InventorAnton Salfelner
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Abstract
A frequency modulation method is provided in which the frequency of a carrier signal is modulated on the basis of the frequency of a modulation signal, and in which the modulation signal is integrated. The carrier signal is integrated, and a differential signal is formed from the integrated modulation signal and the integrated carrier signal. The differential signal is phase-modulated in order to obtain the frequency-modulated carrier signal as the output signal.
Claims20
A frequency modulator for modulating the frequency of a carrier signal on the basis of the frequency of a modulation signal, the frequency modulator comprising:
- a first integrator in which the modulation signal is integrated;
- a phase modulator;
- a second integrator in which the carrier signal is integrated;
- a comparator in which a differential signal is formed from the integrated modulation signal and the integrated carrier signal;
- and
- wherein the phase modulator modulates the phase of the differential signal in order to obtain the frequency-modulated carrier signal as an output signal.
A frequency modulation method comprising:
- modulating the frequency of a carrier signal on the basis of the frequency of a modulation signal;
- integrating the modulation signal;
- integrating the carrier signal;
- forming a differential signal from the integrated modulation signal and the integrated carrier signal;
- and
- phase-modulating the differential signal in order to obtain the frequency-modulated carrier signal as an output signal.
A frequency modulator comprising:
- a first integrator in which a modulation signal having a frequency is integrated;
- a second integrator in which a carrier signal having a frequency is integrated;
- means for forming a differential signal from the integrated modulation signal and the integrated carrier signal;
- and
- means for modulating the phase of the differential signal in order to obtain a frequency-modulated carrier signal as an output signal.
Dependencies are inferred from the claim text.