Patent ID: 7642816

Claim:
A transconductor to convert an input voltage to an output current, the transconductor comprising: a primary transconductance stage to provide the output current from the input voltage and a driving current; an adaptive transconductance stage coupled in series with the primary transconductance stage to generate the driving current from the input voltage; and a bias circuit coupled to provide a primary bias voltage to the primary transconductance stage and an adaptive bias voltage to the adaptive transconductance stage; wherein the primary transconductance stage includes a first transistor having a first gate terminal, a first source terminal, and a first drain terminal, and a second transistor having a second gate terminal, a second source terminal, and a second drain terminal; wherein the adaptive transconductance stage includes a third transistor having a third gate terminal, a third source terminal, and a third drain terminal, and a fourth transistor having a fourth gate terminal, a fourth source terminal, and a fourth drain terminal; and wherein the first source terminal and the second source terminal are coupled together to the third drain terminal and the fourth drain terminal.