Class AB VHF CMOS active inductor

A class AB VHF CMOS active inductor with increased signal handling capability is described. Comparing to a class A circuit with the same inductance value, Q factor, and power dissipation, the proposed circuit achieves about 12-dB improvement in dynamic range while maintaining high-frequency operation. Further enhancement is also obtained by using a fully differential floating inductor. HSPICE simulation using BSIM3V3 model with 0.35-/spl mu/m process parameters shows that the fully differential floating active inductor achieves a 51.8-dB dynamic range while dissipating 2.7 mW from a +/-1.5 V supply voltage.