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1. 发明公开

EP2482447A1 Voltage controlled oscillator 审中-公开
标题翻译： Spannungsgesteuerter Oszillator
公开(公告)号：EP2482447A1
公开(公告)日：2012-08-01
申请号：EP12158799.2
申请日：2006-11-29
申请人： Asahi Kasei EMD Corporation
发明人： Yamamoto, Tomoaki
IPC分类号： H03B5/32 , H03B5/36
CPC分类号： H03B5/366 , H03B2200/0092 , H03C3/08
摘要： The present invention provides a voltage controlled oscillator having a wide frequency variation range and an oscillation frequency that shows favorable linearity with respect to control voltage. The present invention includes an amplifier circuit 21, a piezoelectric element 22 connected in parallel to the amplifier circuit 21 and forming a feedback loop, variable capacitive elements 24 and 25 respectively connected to an input terminal and an output terminal of the amplifier circuit 21 and having a capacitance value that is dependent on control voltage, and an analog operation circuit 26 that generates a control voltage Vcs based on an inputted control voltage Vc. In this arrangement, the control voltage Vc is applied to the variable capacitive element 24 and the control voltage Vcs generated by the analog operation circuit 26 is applied to the variable capacitive element 25.
摘要翻译：本发明提供了一种具有宽的频率变化范围和相对于控制电压具有良好线性度的振荡频率的压控振荡器。本发明包括放大器电路21，与放大器电路21并联连接并形成反馈回路的压电元件22，分别连接到放大器电路21的输入端子和输出端子的可变电容元件24和25，并具有取决于控制电压的电容值，以及基于输入的控制电压Vc产生控制电压Vcs的模拟运算电路26。在这种布置中，控制电压Vc被施加到可变电容元件24，并且由模拟运算电路26产生的控制电压Vcs被施加到可变电容元件25。

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