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CMOS Phase and Quadrature Pulsed Differential Oscillators Coupled through Microstrip Delay-Lines
Department of Information Engineering, Electronics and Telecommunications, “Sapienza - University of Rome”, Rome, Italy
Department of Information Engineering, Electronics and Telecommunications, “Sapienza - University of Rome”, Rome, Italy
Department of Information Engineering, Electronics and Telecommunications, “Sapienza - University of Rome”, Rome, Italy
- 1 Department of Information Engineering, Electronics and Telecommunications, “Sapienza - University of Rome”, Rome, Italy
- 2 Department of Information Engineering, Electronics and Telecommunications, “Sapienza - University of Rome”, Rome, Italy
- 3 Department of Information Engineering, Electronics and Telecommunications, “Sapienza - University of Rome”, Rome, Italy
Circuits and Systems·Volume 05 (2014)·Pages 181–190·Published 8 August 2014·DOI10.4236/cs.2014.58020
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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.
KeywordsVoltage Controlled OscillatorMicrostripDelay-LinePhase and QuadraturePhase Noise
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