On-chip planar inductors and 18 GHz npn bipolar transistors are used to implement a simple monolothic 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.
Tarvainen, E., Ronkainen, H., Kattelus, H., Riihisaari, T., & Kuivalainen, P. (1996). 1.8 GHz current-controlled oscillator IC implemented by using integrated inductors and 0.8 µm BiCMOS technology. Electronics Letters, 32(16), 1465-1467. https://doi.org/10.1049/el_19960974