A new flipped voltage follower with enhanced bandwidth and low output impedance

摘要

The paper proposes a flipped voltage follower (FVF) cell with wider bandwidth and lower output impedance as compared to the conventional FVF. These improvements are obtained by adding a resistance in the feedback path of conventional FVF. A current mirror is implemented by using proposed FVF cell to verify the performance improvement. The circuits are designed in TSMC 0.18-µm CMOS technology with 1.5 V supply voltage. The simulation results show that bandwidth extension ratio (BWER) of newly developed FVF is 1.4 without peaking and 1.7 with peaking. The BWERs of the passive-compensated current mirror implemented by using proposed FVF cell are 1.28 without peaking and 1.58 with peaking in the frequency response.