Design of wide-tuning high-Q differential active inductor for multistandard applications

In this paper, a new tunable differential active inductor (DAI) architecture based on the use of two cascade-grounded active inductors is proposed. A negative resistance based cross-coupled pairs is added to improve the quality factor. The DAI has been implemented in 0.13μm CMOS process. The obtained simulation results show an inductance tuning range from 80 nH to 520 nH for circuit operating frequency range from 0.78 GHz to 3.25 GHz achieving 66% tuning range. A high quality factor of 2672 is obtained at the center frequency of 1.65 GHz. The power consumption is around 2.5 mW under 1V power supply. It occupies a small chip area of around 23.6 × 37.8 μm2.