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Low‐voltage high‐performance current mirrors: Application to linear voltage‐to‐current converter
Author(s) -
Hassen Néjib,
Gabbouj Houda Bdiri,
Besbes Kamel
Publication year - 2011
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.618
Subject(s) - current mirror , cmos , current feedback operational amplifier , electronic engineering , output impedance , settling time , computer science , voltage , negative impedance converter , operational amplifier , amplifier , current conveyor , electrical impedance , electrical engineering , voltage source , engineering , resistor , step response , transistor , control engineering
Current mirror is one of the basic building blocks of analog VLSI systems. For high‐performance analog circuit applications, the accuracy and bandwidth are the most important parameters to determine the performance of the current mirror. This paper presents an efficient implementation of a CMOS current mirror suitable for low‐voltage applications. This circuit combines a shunt input feedback, a regulated cascade output and a differential amplifier to achieve low input resistance, high accuracy and high output resistance. A comparison of several architectures of this scheme based on different architectures of the amplifier is presented. The comparison includes: input impedance, output impedance, accuracy, frequency response and settling time response. These circuits are validated with simulation in 0.18µm CMOS TSMC of MOSIS. In this paper, a linear voltage to current converter, based on the adapted current mirror, is proposed. Its static and dynamic behaviour is presented and validated with the same technology. Copyright © 2009 John Wiley & Sons, Ltd.