Method to mitigate undesired oscillator frequency modulation effects in-side a synthesizer due to interference signals and synthesizer circuit
AssigneeIntel IP Corporation
InventorsRotem Avivi, Giuseppe Li Puma
Life of this patent
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Abstract
A synthesizer circuit to generate a local oscillator carrier signal for a baseband signal includes a controlled oscillator comprising a phase lock loop and an oscillator configured to generate an oscillating signal. A pulling compensation circuit is configured to generate a correction signal for a present output of the phase locked loop using information on an error of the oscillating signal, information on a present sample of a baseband signal and a preceding correction signal for a preceding output of the phase locked loop.
Claims24
A synthesizer circuit adapted to generate a local oscillator carrier signal for a baseband signal, comprising:
- a controlled oscillator comprising a phase lock loop and an oscillator configured to generate an oscillating signal;
- and
- a pulling compensation circuit configured to generate a correction signal for a present output of the phase locked loop based on information on an error of the oscillating signal, information on a baseband signal and a preceding correction signal for a preceding output of the phase locked loop.
A method adapted to mitigate a leakage effect of a baseband signal for a Synthesizer, the method comprising:
- generating an oscillating signal, by a phase lock loop and an oscillator;
- and
- generating a correction signal for a present output of the phase locked loop based on information on an error of the oscillating signal, information on a present sample of a baseband signal and a preceding correction signal for a preceding output of the phase locked loop.
A mobile telecommunications device comprising a transmitter circuit, the transmitter circuit comprising:
- a synthesizer circuit comprising:
- a controlled oscillator comprising a phase lock loop and an oscillator configured to generate an oscillating signal;
- and
- a pulling compensation circuit configured to generate a correction signal for a present output of the phase locked loop based on information on an error of the oscillating signal, information on a baseband signal and a preceding correction signal for a preceding output of the phase locked loop;
- and
- a mixer circuit configured to mix a signal based on the baseband signal and the oscillating signal to generate a radio frequency signal.
Dependencies are inferred from the claim text.