Low phase noise crystal oscillator with supply noise filtering
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机译:具有电源噪声滤波功能的低相位噪声晶体振荡器
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摘要
A low phase noise crystal oscillator with supply noise filtering is provided and may comprise receiving an input voltage at a positive potential input of an oscillator circuit, which may comprise an oscillator core and a buffer coupled to an output of the oscillator core. Noise caused by the input voltage that may affect the buffer may be filtered using a resistor coupled between the positive potential input of the oscillator circuit and the input voltage, and a capacitor coupled between the positive potential input of the oscillator circuit and a ground of the oscillator circuit. The noise may be filtered via a low pass filter, which may comprise at least the resistor and the capacitor. A cutoff frequency may be selected for the low pass filter, and a resistance value for the resistor and a capacitance value for the capacitor may be selected appropriately.
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