Agere Systems Guardian Corp.

Politecnico Di Milano

Carlo Samori

Mihai Banu

Salvatore Levantino

Marco Zanuso

It is described an electronic device for generating a fractional synthesized frequency. The device comprises a multi-phase controlled oscillator configured to generate, from a control signal, a plurality of signals phase-shifted each other and comprises a phase detector configured to receive a selected signal from the plurality of phase-shifted signals, to receive a reference signal and to measure a difference between a phase of the selected signal and a phase of the reference signal. The electronic device further comprises control means for estimating, from the measured phase difference, a phase error affecting the generation of at least one of the plurality of phase-shifted signals, and for generating a corrected measure of the phase difference taking into account the estimated phase error, the corrected measure being used to provide the control signal.

Electronic device for generating a fractional frequency

A sampling device for sampling an input signal having intrinsic filter properties. The sampling device samples a continuous analog input signal according to a sampling signal. The sampling device includes a first sampling switch for sampling the input signal, in response to a sampling signal, to create a first set of samples. Furthermore, the sampling device incorporates a time delay device for time delaying the first set of samples. The sampling device also includes a phase shift device for phase shifting the input signal. The phase delayed input signal is then fed into a second sampling switch for sampling in response to the sampling signal to create a second set of samples. Further, a summer is incorporated to sum the first set of samples with the second set of samples to create the output samples.

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Milan, Italy

Carlo Samori