Background: Immense growth in the field of VLSI technology is fuelled by its feasibility
to realize analog circuits in μm and nm technology. The current mirror (CM) is a basic building
block used to enhance performance characteristics by constructing complex analog/mixed-signal
circuits like amplifier, data converters and voltage level converters. In addition, the current mirror
finds diverse applications from biasing to current-mode signal processing.
Methods: In this paper, the Complementary Metal Oxide Semiconductor (CMOS) technologybased
current mirror (CM) circuits are discussed with their advantages and disadvantages accompanied
by the performance analysis of different parameters. It also briefs various techniques which
are employed for improvising the current mirror performance like gain boosting and bandwidth extension.
Besides, this paper lists the CMs that use different types of MOS devices like Floating
Gate MOS, Bulk-driven MOS, and Quasi-Floating Gate MOS. As a result, the paper performs a detailed
review of CMOS Current mirrors and their techniques.
Results: Basic CM circuits that can act as building blocks in the VLSI circuits are simulated using
0.25 μm, BSIM and Level 1 technology. In addition, various devices based CMs are investigated
Conclusion: The comprehensive discussion shows that the current mirror plays a significant role in
analog/mixed-signal circuits design to realize complex systems for low-power biomedical and