CMOS Phase and Quadrature Pulsed Differential Oscillators Coupled through Microstrip Delay-Lines

Francesco Stilgenbauer, Stefano Perticaroli, Fabrizio Palma

Department of Information Engineering, Electronics and Telecommunications, “Sapienza - University of Rome”, Rome, Italy.

DOI: 10.4236/cs.2014.58020                

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.

Keywords

Voltage Controlled Oscillator, Microstrip, Delay-Line, Phase and Quadrature, Phase Noise

Conflicts of Interest

The authors declare no conflicts of interest.

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