公开(公告)号：EP1760876A4

公开(公告)日：2008-07-23

申请号：EP05720170

申请日：2005-03-07

申请人： MITSUBISHI ELECTRIC CORP

发明人： TSURU MASAOMI ,  KAWAKAMI KENJI ,  TAJIMA KENICHI ,  MIYAZAKI MORIYASU ,  MIYAMOTO KAZUHIRO ,  NAKANE MASAFUMI

IPC分类号： H03B5/12 ,  H03B5/18 ,  H03H5/12 ,  H03H11/10 ,  H03H11/44 ,  H03H11/48

CPC分类号： H03H11/44 ,  H03B5/1203 ,  H03B5/1228 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1293 ,  H03B2200/0042 ,  H03H11/28 ,  H03H11/481

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.

摘要翻译： 压控振荡器具有用于控制振荡频率的调谐电路。 调谐电路具有可变电容元件，其电容响应于阻抗频率特性与正常电容具有相反特性的控制电压和负电容电路而变化，并且连接到可变电容元件。 该结构能够增加与由可变电容元件和负电容电路构成的组合电容的控制电压对应的变化率，从而使振荡频带变宽。