Circuit for demodulating a phase modulated signal
AssigneeInfineon Technologies AG
InventorsWalter Kargl, Markus Auer, Albert Missoni
Life of this patent
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Abstract
A demodulator is provided for demodulating a phase-modulated data signal. The demodulator includes a phase frequency detector to output a voltage representing a phase difference between a received phase-modulated data signal and a reference clock signal. The voltage is input to first and second phase change detectors, which are provided to measure the phase difference of the phase-modulated data signal during first and second time periods, respectively.
Claims25
A demodulator for demodulating a phase-modulated data signal, comprising:
- a phase frequency detector configured to output a voltage representing a phase difference between the phase-modulated data signal and a reference clock signal;
- a first phase change detector coupled to the phase frequency detector and configured to measure, during a first time period, the phase difference represented by the voltage;
- and
- a second phase change detector coupled to the phase frequency detector and configured to measure, during a second time period, the phase difference represented by the voltage.
A method for demodulating a phase-modulated data signal, the method comprising:
- generating a voltage representing a phase difference between a phase-modulated data signal and a reference clock signal;
- measuring, by a first phase change detector, the phase difference represented by the voltage during a first time period;
- and
- measuring, by a second phase change detector, the phase difference represented by the voltage during a second time period.
A demodulation circuit for demodulating a phase-modulated data signal, comprising:
- a phase frequency detection means for outputting a voltage representing a phase difference between the phase-modulated data signal and a reference clock signal;
- a first phase change detection means for measuring, during a first time period, the phase difference represented by the voltage;
- and
- a second phase change detection means for measuring, during a second time period, the phase difference represented by the voltage.
A method for demodulating a phase-modulated data signal, the method comprising:
- generating a voltage representing a phase difference between a phase-modulated data signal and a reference clock signal;
- measuring, by a first phase change detector, the phase difference represented by the voltage during a first time period;
- calibrating a second phase change detector during the first time period;
- measuring, by the second phase change detector, the phase difference represented by the voltage during a second time period;
- and
- calibrating the first phase change detector during the second time period.
Dependencies are inferred from the claim text.