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US 9,866,361 B2Granted
Radio communication device, oscillation circuit, and sensitivity suppression reduction method
AssigneeJVC KENWOOD Corporation
InventorNaoto Sano
Life of this patent
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Abstract
A radio communication device includes an oscillation circuit and a modulation path. The oscillation circuit is configured to perform PLL control by using a reference frequency oscillated by a reference oscillator. The modulation path is configured to modulate a reference signal outputted from the reference oscillator, by a signal of a comparison frequency as a modulation wave.
Claims6
A radio communication device comprising:
- an oscillation circuit configured to perform PLL control by using a reference frequency oscillated by a reference oscillator;
- and
- a modulation path configured to modulate a reference signal outputted from the reference oscillator by a signal of a comparison frequency, as a modulation wave,
- wherein the modulation path modulates the reference signal so as to reduce an interference level, in a case where harmonics of the reference frequency are interference signals to a received signal, when the radio communication device is in a receiving state.
1 more element
A sensitivity suppression reduction method comprising:
- with a phase-locked loop, performing PLL control by using a reference frequency oscillated by a reference oscillator;
- and
- modulating a reference signal outputted from the reference oscillator by a signal of a comparison frequency, as a modulation wave,
- wherein the modulating reduces an interference level in a case where harmonics of the reference frequency are interference signals to a received signal.
1 more element
Dependencies are inferred from the claim text.