Low-Voltage Flipped Voltage Follower Cell Based Current Mirrors for High Frequency Applications

The paper proposes low-voltage current mirrors namely low-voltage current mirror (LVCM) and flipped voltage follower based low-voltage current mirror (FVFLVCM) with high bandwidth. The stability of the proposed circuits has been performed by time-domain approach and frequency domain approach using Routh-Hurwitz stability criteria and phase margin calculations, respectively. The bandwidth of the proposed FVFLVCM has also been enhanced using resistive compensation technique. The proposed LVCM and FVFLVCM have wide input current range of 0-100 mu A and 0-150 mu A, low DC error of 5.9% and 4.9%, low DC power dissipation of 110.39 mu W and 99 mu W, high bandwidth of 367 MHz and 624 MHz, low input impedance of 16.3 K Omega and 12.3 K Omega, low THD of 0.26% and 1% and low output noise of 2.25 nA and 2.83 nA over 100 MHz, respectively. The results have been simulated using SPICE in the TSMC 0.18 mu m CMOS technology and are presented to validate the effectiveness of the proposed current mirrors.