DESIGN OF A 2.5-GHz QVCO ROBUST AGAINST HIGH FREQUENCY SUBSTRATE NOISE

作者：Molina Marc^*; Gomez Didac; Aragones Xavier; Mateo Diego; Luis Gonzalez Jose

来源：Microwave and Optical Technology Letters, 2011, 53(7): 1632-1637.

DOI：10.1002/mop.26043

• substrate noise
• voltage controlled oscillator
• frequency pulling

This work presents the design procedure followed to obtain a low-power voltage-controlled oscillator (VCO) robust against high-frequency substrate noise, using as a demonstrator a 2.5 GHz VCO with quadrature outputs (QVCO) based on a 5-GHz LC tank resonant VCO (LC-VCO) and frequency divider. A simple, intuitive, and easy to handle analytical model is proposed to identify the design parameters that contribute to the performance degradation of LC-VCOs due to the effect of high frequency substrate noise. The guidelines obtained have been applied in the design of the low-power QVCO. Finally, the work discusses several trade-offs that can be used to maximize the immunity of a LC-VCO against substrate noise.

• 出版日期2011-7