摘要:
La présente invention concerne un dispositif de synthèse de fréquence à rang de multiplication élevé, comprenant un générateur de fréquence de base (810) générant deux premiers signaux de base de forme carrée de même fréquence et inverses l'un de l'autre, un premier étage de synthèse (820) comprenant deux premiers oscillateurs à alimentation commutée (821), dont les alimentations sont respectivement commutées par les deux premiers signaux de base, un second étage de synthèse (830) comprenant un deuxième oscillateur à alimentation commutée (831) dont l'alimentation est commutée par une combinaison des signaux de sortie des deux premiers oscillateurs, la sortie du second oscillateur à alimentation commutée étant filtrée par un circuit de discrimination de fréquence (832) réalisé au moyen d'un oscillateur à verrouillage par injection.
摘要:
A frequency estimation signal generator component arranged to receive an input frequency signal and to generate therefrom a frequency estimation signal. The frequency estimation signal generator component comprises a counter component arranged to sequentially output a sequence of control signal patterns over a plurality of digital control signals under the control of an oscillating signal derived from the received input frequency signal terns. The frequency estimation signal generator further comprises a continuous waveform generator component arranged to receive the plurality of digital control signals and a weighted analogue signal for each of the received digital control signals, and to output a continuous waveform signal comprising a sum of the weighted analogue signals for which the corresponding digital control signals comprise an asserted logical state. The frequency conversion component is arranged to derive the frequency estimation signal from the continuous waveform signal output by the continuous waveform generator component
摘要:
A processing-efficient chirp generator that allows flexibility in controlling phase, frequency and slope, i.e., rate of change of frequency. In one embodiment, a fine phase propagation block generates phase values in increments of the fine time step, each phase value also offset from other phase values by multiples of a coarse time step. The phase samples are realigned in time after conversion to digital-to-analog converter (DAC) values.
摘要:
There are disclosed various methods and apparatuses for generating oscillator signals.In some embodiments the method comprises receiving a reference clock signal;obtaining a set of phase shifted reference clock signals; obtaining a phase selection control;using a most significant part of the phase selection control to select one of the phase shifted reference clock signals; and using a least significant part of the phase selection control to delay the selected phase shifted reference clock signal.
摘要:
The subject matter discloses a method for generating a new dynamic function embedded within a chip, wherein the chip comprises a plurality of a building blocks, a first function, and a specification defining the new dynamic function; the method comprising the steps of: within the chip, performing the first function in accordance with the specification and/or analysis; and within the chip, generating the new dynamic function upon the performing the first function.