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US 2010/0074387 A1Published application
Frequency to Phase Converter with Uniform Sampling for all Digital Phase Locked Loops
AssigneeInfineon Technologies AG
InventorsStefan Mendel, Christian Vogel
Life of this patent
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Abstract
This disclosure relates to systems and methods for frequency to phase conversion using uniform sampling, where a uniform or constant clock period is used.
Claims38
A frequency to phase converter that converts an input signal with an arbitrary frequency into a output phase signal, wherein the output phase signal is a time-domain signal having a constant or uniform period.
An all-digital phase locked loop (ADPLL) comprising:
- a reference clock signal with uniform clock period;
- a phase detector that compares a reference phase signal and a digital phase feedback signal defined in time domain with the uniform clock period, and generates an error phase signal;
- a digital loop filter that filters the error phase signal;
- a digitally controlled oscillator that generates a variable frequency signal corresponding to the error phase signal;
- and
- a frequency to phase converter that converts the variable frequency signal into the digital phase feedback signal defined in time domain with the uniform clock period.
3 more elements
A method for converting a frequency feedback signal into a phase signal comprising:
- receiving the frequency feedback signal;
- converting the frequency feedback signal into a digital phase signal with a uniform reference frequency signal;
- and
- comparing the digital phase signal and a reference phase signal to generate an error phase signal.
1 more element
Dependencies are inferred from the claim text.