A current-controlled oscillator with high linearity and wide output frequency range is designed. A modified current-starved ring oscillator is utilized to expand the range of control voltage and keep high linearity of oscillator circuit. The circuit is designed based on 28 nm complementary metal oxide semiconductor（ CMOS）process

the post simulation results show that control voltage of oscillator range from 200 m V to 700 m V

and the output frequency range from 600 MHz to 1 600 MHz. Meanwhile

the nonlinearity between oscillation frequency and control voltage is about 3 %.