发明授权
- 专利标题: Voltage controlled oscillator and frequency control method of the voltage controlled oscillator
- 专利标题(中): 压控振荡器和压控振荡器的频率控制方法
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申请号: US11885859申请日: 2006-01-26
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公开(公告)号: US07652544B2公开(公告)日: 2010-01-26
- 发明人: Kenichi Hosoya , Shigeki Wada
- 申请人: Kenichi Hosoya , Shigeki Wada
- 申请人地址: JP Tokyo
- 专利权人: NEC Corporation
- 当前专利权人: NEC Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: McGinn IP Law Group, PLLC
- 优先权: JP2005-063651 20050308
- 国际申请: PCT/JP2006/301181 WO 20060126
- 国际公布: WO2006/095502 WO 20060914
- 主分类号: H03B5/12
- IPC分类号: H03B5/12
摘要:
A voltage controlled oscillator of the present invention includes power supply terminal (101), control terminal (2) for controlling an output frequency, output terminals (3a, 3b), cross-coupled transistors (5a, 5b), capacitances (6a, 6b, 7a, 7b), LC tanks (10a, 10b), resistor (117), grounding capacitance (18) and center frequency control circuit (16). Center frequency control circuit (16) includes resistors (11a, 11b), grounding capacitance (12), center frequency control terminal (4) for controlling a center frequency of the output frequency, and voltage-divider circuit (15). Resistors (11a, 11b) are connected to the base terminals of cross-coupled transistors (5a, 5b), the other ends of resistors (11a, 11b) are connected to each other, and, to this connecting point, one end of grounding capacitance (12) and one end of voltage-divider circuit (15) are connected. The other end of voltage-divider circuit (15) is connected to center frequency control terminal (4).
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