Synthesizer and reception device using the same
First Claim
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1. A synthesizer comprising:
- a synthesizer section for generating an oscillation signal based on a reference oscillation signal output from a reference oscillator including a micro-electro-mechanical system (MEMS) resonator, and inputting the oscillation signal to a frequency converter; and
a control section for adjusting a frequency of the oscillation signal output from the synthesizer section by a frequency adjustment value Δ
fcont,wherein, when a signal quality of an output signal from the frequency converter is better than or equal to a signal quality represented by a quality limit threshold value, the control section adjusts the frequency adjustment value Δ
fcont to be less than or equal to a predetermined value F associated with the quality limit threshold value, based on a predetermined relationship between the frequency adjustment value Δ
fcont and the signal quality.
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Abstract
A synthesizer of the present invention includes a synthesizer section that generates an oscillation signal based on a reference oscillation signal output from a MEMS resonator and inputs the oscillation signal to a frequency converter; and a control section that adjusts a frequency of the oscillation signal output from the synthesizer section. In frequency adjustment by the control section, when a frequency adjustment unit of the synthesizer section is defined as predetermined value F in which quality of an output signal from the frequency converter is a quality limit threshold value, frequency adjustment unit Δfcont of the synthesizer section is within predetermined value F.
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Citations
14 Claims
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1. A synthesizer comprising:
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a synthesizer section for generating an oscillation signal based on a reference oscillation signal output from a reference oscillator including a micro-electro-mechanical system (MEMS) resonator, and inputting the oscillation signal to a frequency converter; and a control section for adjusting a frequency of the oscillation signal output from the synthesizer section by a frequency adjustment value Δ
fcont,wherein, when a signal quality of an output signal from the frequency converter is better than or equal to a signal quality represented by a quality limit threshold value, the control section adjusts the frequency adjustment value Δ
fcont to be less than or equal to a predetermined value F associated with the quality limit threshold value, based on a predetermined relationship between the frequency adjustment value Δ
fcont and the signal quality. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification