1.8 GHz current-controlled oscillator IC implemented by using integrated inductors and 0.8 /spl mu/m BiCMOS technology

On-chip planar inductors and 18 GHz n-p-n bipolar transistors are used to implement a simple monolithic LC current-controlled oscillator which has a 200 MHz tuning range at 1.8 GHz. To save chip area, the integrated capacitors were fabricated above the planar inductor structure. The measured quiescent power dissipation is 3.5 mW from a supply of 3.5 V, and the phase noise is -85 dBc/Hz at 100 kHz offset.