发明名称 |
Voltage-controlled oscillator |
摘要 |
A voltage-controlled oscillator has a tuned circuit for controlling the oscillation frequency. The tuned circuit has a variable-capacitance element whose capacitance varies in response to a control voltage and a negative capacitance circuit whose impedance frequency characteristics have opposite characteristics to those of a normal capacitance, and which is connected to the variable-capacitance element. The configuration enables increasing the variation ratio corresponding to the control voltage of the combined capacitance composed of the variable-capacitance element and negative capacitance circuit, thereby broadening the oscillation frequency band.
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申请公布号 |
US7675376(B2) |
申请公布日期 |
2010.03.09 |
申请号 |
US20050629531 |
申请日期 |
2005.03.07 |
申请人 |
MITSUBISHI ELECTRIC CORPORATION |
发明人 |
TSURU MASAOMI;KAWAKAMI KENJI;TAJIMA KENICHI;MIYAZAKI MORIYASU;MIYAMOTO KAZUHIRO;NAKANE MASAFUMI |
分类号 |
H03B5/18;H03B5/12;H03H5/12;H03H11/10;H03H11/44;H03H11/48 |
主分类号 |
H03B5/18 |
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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