发明名称 |
Tunable input trap circuit and image trap circuit |
摘要 |
An input trap circuit removes a predetermined frequency component included in an input signal and then outputs the input signal to a circuit at a later stage. The input trap circuit is provided with: a parallel oscillation circuit in which a pair of variable capacitance diodes are connected in series such that cathodes thereof are connected to each other at a junction portion and in which an inductance is connected in parallel to the variable capacitance diodes between anodes of the variable capacitance diodes at both ends thereof; a voltage applying device for applying a voltage to the junction portion so as to vary capacitance values of the variable capacitance diodes on the basis of reverse voltage characteristics of the variable capacitance diodes respectively; and a variable capacitor element connected between the junction portion and a ground.
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申请公布号 |
US6472956(B2) |
申请公布日期 |
2002.10.29 |
申请号 |
US20000576817 |
申请日期 |
2000.05.24 |
申请人 |
PIONEER CORPORATION |
发明人 |
KOSUGA TADASHI |
分类号 |
H03J5/24;H03J3/18;H03J3/20;H04B1/18;H04B1/26;(IPC1-7):H03H7/01 |
主分类号 |
H03J5/24 |
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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