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Tuning circuit for inductor capacitor (LC) tank digitally controlled oscillator
Tuning circuit for inductor capacitor (LC) tank digitally controlled oscillator
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机译:电感电容(LC)储罐数控振荡器的调谐电路
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摘要
In one embodiment, an apparatus includes a first circuit of a digitally controlled oscillator (DCO). The first circuit has a loss component. A second circuit is coupled to the first circuit and configured to transform a positive impedance into a negative impedance in series with a negative resistance. The negative impedance includes an adjustable reactive component used to adjust a frequency of an output signal of the DCO. An equivalent reactance seen by the first circuit is less than a reactance of the adjustable reactive component.
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