Phase and Quadrature Pulsed Bias LC-CMOS VCO

Stefano Perticaroli, Fabrizio Palma, Adriano Carbone
DOI: 10.4236/cs.2011.21004                

Abstract

Pulsed bias is an attempt to improve the performance of oscillators in integrated circuits as a result of architectural innovation. Given the relatively low value of resonator quality factor achievable on-chip, for a specified bias voltage level, pulsed bias may result in a lower power consumption and in an improvement of the spectral purity of the oscillation. The main drawback of this approach is the need to introduce a certain time delay in order to properly position pulses with respect to oscillation waveform. Delay accumulation requires further energy dissipation and introduce additional jitter. In this paper we present a new architecture capable to avoid unnecessary delay, based on the idea to apply the pulsed bias approach to a quadrature oscillator. A ?rst circuit-level implementation of this concept is presented with simulation results.

Keywords

Phase And Quadrature VCO, Pulsed Bias Oscillator, Floquet Eigenvectors Noise Decomposition

Conflicts of Interest

The authors declare no conflicts of interest.

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