Low voltage current mirrors with enhanced bandwidth

Authors:
Maneesha Gupta;Prashant Aggarwal;Pritender Singh;Naveen Kumar Jindal
Affiliations:
Netaji Subhas Institute of Technology, Dwarka, India 110 078;Netaji Subhas Institute of Technology, Dwarka, India 110 078;Netaji Subhas Institute of Technology, Dwarka, India 110 078;Netaji Subhas Institute of Technology, Dwarka, India 110 078
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2009

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Abstract

This paper presents an improved low voltage cascode and flipped voltage follower (FVF) based current mirror with the enhancement of the bandwidth obtained by using a compensation resistor between the gates of the primary transistor pair. In this technique a carefully determined resistance is used in the diode connected MOS transistor of the current mirror for enhancing the bandwidth. Active realization of the compensation resistance using MOS operating in the triode region has also been applied to both the cascode and FVF based current mirror circuits. The proposed circuits have been simulated using PSpice for 0.25 μm CMOS technology and the obtained results are compared with their uncompensated topologies to show their effectiveness.