Theoretical Analysis of Novel Multi-Order LC Oscillators
Tzeng, F.; Deyi Pi; Safarian, A.; Heydari, P.
Circuits and Systems II: Express Briefs, IEEE Transactions on
Volume 54, Issue 3, March 2007 Page(s):287 - 291
Digital Object Identifier   10.1109/TCSII.2006.888735
Summary:A conventional differential pair LC oscillator is capable of generating only a single fundamental oscillation frequency. This brief presents the theoretical study of a novel oscillator that incorporates higher order LC filters to produce multiple oscillation frequencies that may be several octaves apart. These multiple oscillation frequencies are obtained from a single oscillator, thereby reducing the area of the circuit when being used for multistandard wireless applications. Moreover, a multi-order oscillator does not suffer from large parasitic capacitances from switches, which is a common drawback in switched-inductor tuned oscillators. A detailed analysis is carried out, and useful design insights are provided

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