A 4-GHz fully-monolithic nMOS voltage-controlled oscillator circuit implemented in a 0.5-/spl mu/m BiCMOS technology is presented. The tuning range is 9% with an on-chip varactor-tuned resonator and a control voltage of 0-3 V. The measured phase noise is -85 dBc/Hz at 100 kHz and -106 dBc/Hz at 1 MHz offset. The circuit draws 8 mA from a 3 V supply including the reference branch bias current. Even with the supply voltage and the variation in control voltage reduced to 2.3 V, the VCO has a tuning range of 8%.
No takes yet. Share an insight, caveat, or question.
Soyuer et al. (1996) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: