A −184 dB PSRR and 2.47 μVrms noise self biased bandgap reference based on FVF structure

A high power supply rejection ratio (PSRR), low noise and low-power self-biased bandgap voltage reference (BGR) is presented in this paper. In response to the trade-off between power consumption and output noise, a feedback depth enhancement technique is proposed for mitigating the effect of the resistor on output noise and offset voltage. The PSRR is enhanced by a novel self regulating technology based on an improved flipped voltage follower (FVF). The designed BGR was verified under post-simulation for various process corners, voltages and temperatures (PVT). It was using 0 . 18 μ m BiCMOS process, occupying an active area of 0.016 mm 2 . The BGR operates normally at 3.0 V – 3.6 V with a quiescent current of 3.6 μ A. The best untrimmed TC is 22.04 ppm / ∘ C and the rms noise is only 2.47 μ V r m s from 0.1 Hz to 10 Hz. The PSRR is −184 dB@1 Hz and −50 dB@1 MHz when V I N = 3.0 V.