مشخصات پژوهش

In this paper, a new recycling folded Cascode Operational Trans-conductance Amplifier (OTA) based on a novel Common Mode Rejection Ratio (CMRR) magnifier block is presented and the principle of its operation is discussed in comparison with the conventional recycling folded Cascode OTA. The supply voltage is interestingly decreased in the proposed CMRR Magnifier based Recycling Folded Cascode (CMRFC) OTA, due to the elimination of the Cascode transistors. The common mode current is significantly removed by the CMRR magnifier block which subsequently yields to a relatively higher CMRR comparing with its conventional version. The DC bias voltage of the Cascode stage is also eliminated incorporating the self Cascode structure. The CMRFC OTA is simulated along with its conventional version, namely Double Recycling Folded Cascode (DRFC) OTA structure, at Cadence environment considering the 180nm CMOS technology to provide a fair comparison. The simulation results for the proposed OTA yield 53.4 dB DC-gain, 80.32 degree phase margin and 86.87 dB CMRR with 1.5 volt supply voltage making it a suitable choice for low-voltage applications.