Infineon Technologies Ag

Politecnico Di Milano

Agere Systems Inc.

Salvatore Levantino

Dmytro Cherniak

Marc Tiebout

Roberto Nonis

Robert Charles Frye

Sander Gierkink

Carlo Samori

Vito Boccuzzi

Alessio Santiccioli

Mario Mercandelli

Marco Zanuso

Systems, methods, and circuitries are provided for generating a frequency hopping radar signal. In one example, a radar signal modulator include a frequency offset generator, a phase locked loop, and a bandwidth compensation circuitry. The frequency offset generator is configured to generate a sequence of frequency offsets. The bandwidth compensation circuitry is configured to combine a modulation signal and the sequence of frequency offsets to generate a bandwidth compensated signal. The PLL is configured to receive the bandwidth compensated signal and generate a frequency hopping radar signal based on the bandwidth compensated signal.

Radar signal modulator with bandwidth compensation and frequency offset sequence

In accordance with an embodiment, a method of operating a phase locked loop (PLL), the method including: comparing a phase of a reference signal with a phase of a clock signal using a plurality of parallel matched phase detection circuits to provide a plurality of phase detection signals, where each of the plurality of the parallel matched phase detection circuits is configured to have a same phase difference to output characteristic; filtering a sum of the plurality of phase detection signals to form a filtered phase detection signal; and controlling a frequency of an oscillator using the filtered phase detection signal, where the oscillator is configured to provide the clock signal.

Phase locked loop with parallel phase detection circuits

A phased-locked loop (PLL) circuit with an injection locked digital digitally controlled oscillator (ILD) that has an ILD control input element, an ILD injection input element and an ILD output element. The PLL circuit also includes an adaptive control unit (ACU), wherein the ACU is configured to receive an error signal and is configured to output an ILD control word. The ILD control input element is configured to receive the ILD control word, and the ILD control word may set a natural oscillation frequency of the ILD. The ILD is further configured to output a first output signal from the ILD output element, where the natural oscillation frequency may set a frequency of the first output signal.

Digital frequency synthesizer with robust injection locked divider

The disclosure is directed to a frequency synthesizer circuit including digitally controlled oscillator (DCO) and an injection locked digitally controlled oscillator (ILD). The ILD outputs a signal with a frequency that is some fraction of the frequency of the DCO output signal and locked in phase to the DCO output signal. The frequency synthesizer circuit drives the ILD with the same modulation input signal that drives the DCO, with the modulation input signal scaled to account for any mismatch between the gains of the DCO and ILD. Driving the ILD with the same, scaled modulation signal as the main DCO minimizes the frequency offset between the DCO output signal and the divided natural oscillation frequency of the ILD. Minimizing the frequency offset makes the lock of the ILD more robust and reduces jitter contribution from the ILD.

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 voltage controlled oscillator including a first oscillator circuit portion with at least one first inductor, and a second oscillator circuit portion with at least one second inductor, wherein the at least one first inductor and the at least one second inductor are electromagnetically coupled to each other.

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Mailand, Italy

Salvatore Levantino