“…The open-loop configuration is also characterized by a poor linearity in the voltage to current conversion, whereas the closed-loop one can have a highly linear voltage-to-voltage transfer function. Since the new OFDM-based communication standards require high linearity for any circuit in the signal path, in order to minimize the intermodulation among the multiple carriers, new highly linear OTAs are required in order to meet the linearity and bandwidth requirements [3][4][5]. The use of open-loop OTAs also avoid the excessive power consumption required by typical high-bandwidth amplifiers with global feedback.…”