A dynamically tunable transconductor includes a voltage-to-current converter stage for generating a current signal based on a voltage signal; and a current scaling stage for scaling the current signal by a scaling factor to achieve a particular transconductance. Current scaling stage includes a coarse tune mechanism having an associated coarse tune step and a fine tune mechanism having an associated fine tune step, where the scaling factor is a ratio of the coarse tune step to the fine tune step. A delta-sigma modulator can implement the transconductor to generate loop filter coefficients by dynamically tuning the transconductance to achieve a particular resistance.