TITLE:
Phase and Quadrature Pulsed Bias LC-CMOS VCO
AUTHORS:
Stefano Perticaroli, Fabrizio Palma, Adriano Carbone
KEYWORDS:
Phase And Quadrature VCO, Pulsed Bias Oscillator, Floquet Eigenvectors Noise Decomposition
JOURNAL NAME:
Circuits and Systems,
Vol.2 No.1,
January
27,
2011
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.