Abstract
In this paper, a voltage-controlled oscillator (VCO) circuit topology suitable for ultra low-phase noise applications is presented. A differential stage is added for tail current shaping to a conventional cross-coupled VCO to improve the phase noise. The tail current becomes larger when the sensitivity of the output phase to the noise is smaller and the oscillator output voltage reaches to the maximum or minimum values. The proposed circuit does not consume extra power and does not utilize noisy active devices. Simulation results show the 2.5 dB improvement in the phase noise at 1 GHz center frequency. The power consumption of the proposed circuit is 2.44 mW with a figure of merit (FoM) of −192.2 dBc/Hz.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
