Patent attributes
A current replication circuit includes a bias circuit and a first transistor sized, relative to a second transistor to be sensed, according to a first scaling factor, the first transistor having an on-resistance associated therewith. The current replication circuit further includes at least one transconductance amplifier having first and second signal paths. The first signal path is connected with the bias circuit in a closed loop configuration such that a quiescent bias point of the transconductance amplifier is controlled as a function of the on-resistance of the first transistor. The second signal path is connected with the second transistor in an open loop configuration and is adapted to convert a sensed input voltage to a corresponding current output signal as a function of the quiescent bias point of the transconductance amplifier, the current output signal being proportional to a current flowing through the second transistor.
