Low voltage high bandwidth FVF current mirror using quasi floating self-cascode output stage

Current mirrors with ideal performance are widely in demand for realizing low power applications. In this paper, an FVF current mirror is proposed to have high bandwidth, low input, and boosted output resistance. The low voltage operation is confirmed using flipped voltage follower at the input. Also at the input, a local negative feedback loop is created which reduces the input node resistance and the achieved value ranges below an ohm. The output stage consists of a regulated cascode and a super cascode topology which is driven by an inverting amplifier realized using a self-cascode structure to improve the output resistance. However, instead of using the traditional gate-driven self-cascode, the proposed design uses its quasi-floating gate MOS transistor-based structure which further improves the output resistance and bandwidth. The proposed current mirror operates with minimum error in the range of 0–1000 µA. The bandwidth of the proposed circuit ranges in gigahertz which is 3.1 GHz. The resistance at the input is found as 0.407 Ω whereas the output has boosted resistance to a Giga ohm value which is 86 GΩ. The stability and robustness analysis is done via temperature, process corners and Monte Carlo runs. The complete design is done using the MOSFET model of UMC in 0.18-micron technology at \(\pm\) 0.5 V with the help of HSpice.