发明授权
US5859573A Circuit for separating the output of an oscillator from the other parts
of a mobile communication system
失效
用于将振荡器的输出与移动通信系统的其他部分分离的电路
- 专利标题： Circuit for separating the output of an oscillator from the other parts of a mobile communication system
- 专利标题（中）： 用于将振荡器的输出与移动通信系统的其他部分分离的电路
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申请号： US898875申请日： 1997-07-23
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公开(公告)号： US5859573A公开(公告)日： 1999-01-12
- 发明人: Osmo Kukkonen
- 申请人： Osmo Kukkonen
- 申请人地址： FIX Espoo
- 专利权人： Nokia Mobile Phones, Ltd.
- 当前专利权人： Nokia Mobile Phones, Ltd.
- 当前专利权人地址： FIX Espoo
- 优先权： FIX962966 19960725
- 主分类号： H03B1/00
- IPC分类号： H03B1/00 ; H03B5/12 ; H03L5/00
摘要：
The invention concerns oscillator circuits, more particularly coupling arrangements between an oscillator and an amplifier stage following the oscillator. The solution according to the invention optimizes the intensity of the coupling between the oscillator and the following amplifier stage so that the desired output level of the oscillator circuit is gained but the oscillator is loaded as little as possible. In the system according to the invention, the impedance value of the circuit element between the oscillator and the amplifier stage has been arranged to be automatically adjustable so that it is always adjusted to its smallest value, on which the desired output level of the oscillator coupling can still be gained. The coupling can, for example, be formed by means of a capacitance diode, the bias voltage of which is adjusted according to the direct voltage detected at the output level of the amplifier stage.
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