The demand of voltage-controlled oscillators (VCOs) with a broad tuning range can lead to unacceptable degradation of the 1/f^3 phase-noise component if traditional voltage-biased topologies are implemented. In this paper, a novel VCO architecture is proposed, where a segmented transconductor tailors the negative g m depending on the operating range to ensure that flicker-noise up-conversion remains minimal. The implemented oscillator covers both 4G and WiMAX 2.5-GHz operation modes and achieves a 10-dB reduction of the 1/f^3 phase noise without impairing the 1/f^2 phase-noise performance.
A wideband voltage-biased LC oscillator with reduced flicker noise up-conversion
PEPE, FEDERICO;BONFANTI, ANDREA GIOVANNI;LEVANTINO, SALVATORE;SAMORI, CARLO;LACAITA, ANDREA LEONARDO
2013-01-01
Abstract
The demand of voltage-controlled oscillators (VCOs) with a broad tuning range can lead to unacceptable degradation of the 1/f^3 phase-noise component if traditional voltage-biased topologies are implemented. In this paper, a novel VCO architecture is proposed, where a segmented transconductor tailors the negative g m depending on the operating range to ensure that flicker-noise up-conversion remains minimal. The implemented oscillator covers both 4G and WiMAX 2.5-GHz operation modes and achieves a 10-dB reduction of the 1/f^3 phase noise without impairing the 1/f^2 phase-noise performance.File in questo prodotto:
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Pepe_RFIC_2013.pdf
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