A Linear Optimization Method and Its Application to Transconductance Amplifier

Based on the linearity theory of transconductance amplifier and mathematical analysis,a method of improving linearity is presented.In this method,the mathematical analysis and simulation experiments proved that linearity of double ended input transconductor is better than single ended input transconductor.When one end input signal is 4/3 of the other end input signal and plus 1,the transconductor linear distortion can be minimized.A new transconductor is proposed according to the optimization measure. The simulation results show that the spurious free dynamic range of the transconductor is 60.25dB,and noise-floor reach up to -100dB.