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 CS  Vol.2 No.1 , January 2011
Phase and Quadrature Pulsed Bias LC-CMOS VCO
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.
Cite this paper: nullS. Perticaroli, F. Palma and A. Carbone, "Phase and Quadrature Pulsed Bias LC-CMOS VCO," Circuits and Systems, Vol. 2 No. 1, 2011, pp. 18-24. doi: 10.4236/cs.2011.21004.
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