发明名称 |
Local oscillator, receiver, and electronic device |
摘要 |
A broad oscillation frequency range and good phase noise characteristic are achievable simultaneously by an oscillation circuit and a resonance circuit connected to the oscillation circuit. The resonance circuit includes an inductor element connected to the oscillation circuit, a first variable capacitance section connected to the inductor element, and a second variable capacitance section connected in parallel to the first variable capacitance section. The first variable capacitance section includes a first variable capacitive element connected to the inductor element, and a second variable capacitive element connected in parallel to the first variable capacitive element. The first variable capacitive element changes its capacity value based on a control voltage and a first reference voltage. The second variable capacitive element changes its capacity value based on the control voltage and a second reference voltage. The first reference voltage and the second reference voltage are controlled based on the capacity value of the second variable capacitance section. |
申请公布号 |
US8165550(B2) |
申请公布日期 |
2012.04.24 |
申请号 |
US20080282080 |
申请日期 |
2008.03.07 |
申请人 |
FUJII TAKESHI;OOBA YASUO;IWAIDA MINEYUKI;OZEKI HIROAKI;PANASONIC CORPORATION |
发明人 |
FUJII TAKESHI;OOBA YASUO;IWAIDA MINEYUKI;OZEKI HIROAKI |
分类号 |
H04B1/06;H04B7/00 |
主分类号 |
H04B1/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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