1. A transconductor having a dynamically tunable transconductance, the transconductor comprising: a voltage-to-current converter stage configured to generate a current signal based on a voltage signal; and a current scaling stage configured to scale the current signal by a scaling factor to achieve a particular transconductance, wherein the 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, wherein the scaling factor is a ratio of the coarse tune step to the fine tune step.