发明名称 |
Voltage controlled oscillator and PLL circuit including voltage controlled oscillator |
摘要 |
A voltage controlled oscillator having a wide oscillation frequency band, desirable carrier-noise characteristic, and desirable linearity of the oscillation frequency relative to a control voltage. The voltage controlled oscillator includes an oscillation unit and a control unit. The oscillation unit generates an output signal having an oscillation frequency corresponding to the control voltage in one of a plurality of oscillation frequency bands. The oscillation unit includes a switching unit for selecting one of the plurality of oscillation frequency bands in accordance with a switching signal. The control unit generates the switching signal in accordance with the control voltage. |
申请公布号 |
US2003222726(A1) |
申请公布日期 |
2003.12.04 |
申请号 |
US20030443105 |
申请日期 |
2003.05.22 |
申请人 |
FUJITSU LIMITED |
发明人 |
YONEKAWA MASAYUKI;DOI TAKEHITO |
分类号 |
H03B5/08;H03B1/00;H03B5/12;H03L7/099;(IPC1-7):H03B1/00 |
主分类号 |
H03B5/08 |
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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