Resumen
A high performance bulk-driven rail-to-rail fully differential buffer operating from ±0.3V supplies in 180 nm CMOS technology is reported. It has a differential?difference input stage and common mode feedback circuits implemented with no-tail, high CMRR bulk-driven pseudo-differential cells. It operates in subthreshold, has infinite input impedance, low output impedance (1.4 k?), 86.77 dB DC open-loop gain, 172.91 kHz bandwidth and 0.684 µW static power dissipation with a 50-pF load capacitance. The buffer has power efficient class AB operation, a small signal figure of merit FOMSS = 12.69 MHzpFµW-1, a large signal figure of merit FOMLS = 34.89 (V/µs) pFµW-1, CMRR = 102 dB, PSRR+ = 109 dB, PSRR- = 100 dB, 1.1 µV/vHz input noise spectral density, 0.3 mVrms input noise and 3.5 mV input DC offset voltage.