Polar digital frequency modulator
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorDavid LACHARTRE
Life of this patent
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Abstract
A modulator comprising at least two channels arranged in parallel, each channel receiving respectively, as input, a channel clock signal, each channel being able to delay the channel clock signal in order to generate a modulated channel signal according to channel delay control data; an input logic circuit receiving as input a master clock signal as well as normalized frequency samples, and capable of generating channel clock signals and channel delay control data; and an output logic circuit receiving as input each modulated channel signal and capable of generating a frequency modulated output signal from their combination.
Claims12
A modulator comprising:
- at least two channels arranged in parallel, each channel receiving respectively, as input, a channel clock signal, each channel being configured to delay rising and/or falling edges of the channel clock signal in order to generate a modulated channel signal according to channel delay control data, respectively;
- an input logic circuit receiving as input a master clock signal of frequency Fclk and normalized frequency samples, and configured to generate channel clock signals from the master clock signal, and generate channel delay control data as a function of the normalized frequency samples;
- and
- an output logic circuit receiving as input each modulated channel signal configured to generate a frequency modulated output signal from a combination of the modulated channel signals.
Dependencies are inferred from the claim text.