Stmicroelectronics S.a.

Marc Joisson

Luc Garcia

Marc Gens

A receiver of a frequency-modulated signal representing a digital signal includes a down conversion unit or frequency translation unit to lower the frequency of the frequency-modulated signal and a digital demodulator to regenerate the digital signal from the lowered-frequency signal. The receiver furthermore includes a counter circuit to determine the number of periods of a reference signal from the frequency translation unit during a period of the lowered-frequency signal. The digital demodulator includes a computer unit to compute the period of the lowered-frequency signal from the number of periods of the reference signal.

Receiver of frequency-modulated signals with digital demodulator

A receiver of a frequency-modulated signal is provided. The receiver includes a frequency-transposition unit for lowering the frequency of the frequency-modulated signal, and a digital demodulator for regenerating a digital signal from the frequency-transposed signal. The frequency-transposition unit includes a local oscillator for generating a local oscillator signal used in lowering the frequency of the frequency-modulated signal. The frequency-transposed signal is sampled in the digital demodulator at the rate of a sampling signal, and the sampling signal is generated by the local oscillator of the frequency-transposition unit. In a preferred embodiment, the local oscillator includes at least one frequency-divider circuit that delivers the sampling signal. Also provided is a method for regenerating a digital signal from a frequency-modulated signal.

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Grenoble, France

Marc Joisson