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1. 发明申请

US20020135431A1 APPARATUS AND METHOD FOR REDUCING PHASE NOISE IN OSCILLATOR CIRCUITS 有权
标题翻译：在振荡器电路中减少相位噪声的装置和方法
公开(公告)号：US20020135431A1
公开(公告)日：2002-09-26
申请号：US09783033
申请日：2001-02-15
申请人： Broadcom Corporation
发明人： Ramon A. Gomez
IPC分类号： H03B001/04 , H03B005/12 , H03B005/36
CPC分类号： H03B5/364
摘要： A resonant oscillator circuit includes an active device and a resonator that causes the active device to oscillate at a resonant frequency of the resonator. The active device includes one or more transistors that are DC biased using one or more resistors. The bias resistors generate thermal noise that is proportional to the resistance value. An external inductor circuit is connected across the output terminals of the active device and in parallel with the resonator. The external inductor circuit shorts-out at least some of the thermal noise that is generated by the bias resistors, and thereby reduces the overall phase noise of the resonant oscillator.
摘要翻译：谐振振荡器电路包括有源器件和谐振器，其使得有源器件以谐振器的谐振频率振荡。有源器件包括使用一个或多个电阻器直流偏置的一个或多个晶体管。偏置电阻产生与电阻值成比例的热噪声。外部电感电路连接在有源器件的输出端上并与谐振器并联。外部电感器电路将由偏置电阻产生的至少一些热噪声短路，从而降低谐振振荡器的整体相位噪声。

2. 发明申请

US20010035794A1 Oscillator and communication apparatus 审中-公开
标题翻译：振荡器和通讯设备
公开(公告)号：US20010035794A1
公开(公告)日：2001-11-01
申请号：US09844045
申请日：2001-04-27
申请人： Murata Manufacturing Co., Ltd.
发明人： Masanori Fujidai , Fumitoshi Sato , Toshio Hata
IPC分类号： H03B001/04 , H03B005/12 , H03B005/18
CPC分类号： H03B5/1847 , H03B1/04 , H03B2202/012 , H03B2202/07
摘要： An oscillator includes an oscillating circuit and a resonating circuit connected to the oscillating circuit, and an amplifying circuit for amplifying signals output from the oscillating circuit. The oscillator also includes an added circuit having an isolator, frequency filter, or other suitable elements, disposed between the output portion of the oscillating circuit and the input portion of the amplifying circuit, so as to prevent transmission of unwanted waves, such as the higher harmonic component of the basic wave, and other such undesirable waves. The oscillator, and a communication apparatus including such oscillator, eliminates deterioration of phase noise properties caused by generation of unwanted wave components such as higher harmonics.
摘要翻译：振荡器包括振荡电路和连接到振荡电路的谐振电路，以及用于放大从振荡电路输出的信号的放大电路。该振荡器还包括一个附加电路，该电路具有隔离器，频率滤波器或其它合适的元件，它们设置在振荡电路的输出部分和放大电路的输入部分之间，以便防止不需要的波的传输，例如较高的基波的谐波分量，以及其他这种不希望的波。振荡器和包括这种振荡器的通信装置消除了由诸如高次谐波等不希望的波分量的产生引起的相位噪声特性的恶化。

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