This thesis presents algorithms and tools for the automated design of RF LC
CMOS voltage controlled oscillators (VCOs) with low phase noise given a set of
specifications. The electromagnetic solver, ASITIC, combined with the circuit
simulator, SpectreRF, allows optimization of the VCO circuit parameters and
inductor layout. This approach gives a phase noise improvement of up to
20 dBc/Hz in the flicker noise region and up to 5 dBc/Hz in the thermal noise
region.
An optimization program for the computer-aided design of on-chip spiral
inductors has also been developed. This program allows the designer to obtain the
layout of an inductor with a required inductance value and maximal quality factor,
thus enabling a reduction in the phase noise of the VCO being designed.
The circuit simulator SPICE3 has been extended to handle phase noise
analysis based on a non-linear perturbation analysis for oscillators. The
implemented technique allows for an accurate simulation of phase noise due to
devices described either by analytical or numerical models. With this extension, the
automated design of RF LC oscillators can be performed within the SPICE3
framework. Furthermore, the technique is available in a public domain software
and can be extended to other application domains. / Graduation date: 2004
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/30731 |
| Date | 06 June 2003 |
| Creators | Kratyuk, Volodymyr |
| Contributors | Mayaram, Kartikeya |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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