TITLE:
CMOS Phase and Quadrature Pulsed Differential Oscillators Coupled through Microstrip Delay-Lines
AUTHORS:
Francesco Stilgenbauer, Stefano Perticaroli, Fabrizio Palma
KEYWORDS:
Voltage Controlled Oscillator, Microstrip, Delay-Line, Phase and Quadrature, Phase Noise
JOURNAL NAME:
Circuits and Systems,
Vol.5 No.8,
August
8,
2014
ABSTRACT: An
innovative solution to design phase and quadrature pulsed coupled oscillators
systems through electromagnetic waveguides is described in
this paper. Each oscillator is constituted by an LC differential resonator
refilled through a couple of current pulse generator circuits. The phase and
quadrature coupling between the two differential oscillators is achieved using
delayed replicas of generated fundamentals from a resonator as driving signal
of pulse generator injecting in the other resonator. The delayed replicas are
obtained by microstrip-based delay-lines. A 2.4 - 2.5 GHz VCO has been
implemented in a 150 nm RF CMOS process. Simulations showed at 1 MHz offset a
phase noise of -139.9 dBc/Hz and a
FOM of -189.1 dB.