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US 11,177,994 B2Granted
Polar phase or frequency modulation circuit and method
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorDavid Lachartre
Life of this patent
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Abstract
The present disclosure relates to a polar phase or frequency modulator comprising: a normalized delay circuit (602) configured to delay edges of an input carrier signal (CLK_IN) based on normalized delay control values (φi) to generate a modulated output signal (RF_OUT); and a normalized delay calculator (604) configured to receive the modulated output signal (RF_OUT) and to generate the normalized delay control values (φi).
Claims15
A polar phase or frequency modulator comprising:
- a normalized delay circuit configured to delay edges of an input carrier signal based on digital normalized delay control values to generate a modulated output signal;
- and
- a normalized delay calculator configured to receive at a first input the modulated output signal and having either:
- a second input configured to receive phase samples at a rate different to the frequency of the modulated output signal, each phase sample indicating a target phase offset of the modulated output signal with respect to the input carrier signal;
- or
- a third input configured to receive frequency samples at a rate different to the frequency of the modulated output signal, each frequency sample indicating a phase increment to be applied to the input carrier signal and corresponding to a target frequency of the modulated output signal;
- or
- the second input configured to receive the phase samples and the third input configured to receive the frequency samples,
- the normalized delay calculator being configured to generate the digital normalized delay control values based on the phase samples and/or frequency samples, and to supply to them to the normalized delay circuit, at a rate determined by the modulated output signal.
6 more elements
A method of polar phase or frequency modulation comprising:
- receiving a modulated output signal at a first input of a normalized delay calculator, the normalized delay calculator having a second input and/or a third input;
- receiving either:
- at the second input, phase samples at a rate different to the frequency of the modulated output signal, each phase sample indicating a target phase offset of the modulated output signal with respect to the input carrier signal;
- or
- at the third input, frequency samples at a rate different to the frequency of the modulated output signal, each frequency sample indicating a phase increment to be applied to the input carrier signal and corresponding to a target frequency of the modulated output signal;
- or
- at the second input, the phase samples and at the third input, the frequency samples,
- generating, by the normalized delay calculator, digital normalized delay control values based on the phase samples and/or frequency samples, and supplying them to a normalized delay circuit, at a rate determined by the modulated output signal;
- and
- delaying, by the normalized delay circuit, edges of the input carrier signal based on the digital normalized delay control values to generate the modulated output signal.
7 more elements
Dependencies are inferred from the claim text.