NDLI: Harmonic distortion induced by the λ-effect in MOSFET current mirrors

Content Provider	IEEE Xplore Digital Library
Author	Agostinho, P.R. De Lima, J.A.
Copyright Year	2009
Description	Author affiliation: Center for Technology of Information - IC Design House, Rodovia Dom Pedro I, km 143.6, Campinas - SP, 13069-901 Brazil (De Lima, J.A.) \|\| Miptech - Industrial Automation, São José dos Campos - SP, 12244-000 Brazil (Agostinho, P.R.)
Abstract	This paper discusses the large-signal harmonic distortion (HD) caused by channel-modulation (λ-effect) on four elementary MOS current mirror (CM) configurations. The third-order equation that relates the incremental gate-source voltage to signal current in CM input transistor is conveniently simplified into a simpler quadratic dependence, so that a tractable expression for the output current is obtained, and therefore, closed-form formulae for HD2 and HD3. The study is supported in good conformity by a set of comparisons between data of HD2 and HD3 from a numerical FFT of the cubic equation and those from simplified expressions. HD is calculated in function of circuit and transistor parameters, providing a deep insight for the choice of CM that best trades off layout area and power consumption to meet a distortion level. A comparative HD analysis from distinct current mirrors is also provided. Among the configurations investigated, the high-swing CM presents better linearity, with HD2 below 0.05% across the range of analysis.
Starting Page	175
Ending Page	180
File Size	694477
Page Count	6
File Format	PDF
ISBN	9781457702372
e-ISBN	9781457702365
DOI	10.1109/VLSISOC.2009.6041350
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-12
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current Mirror Linearity Linearity Logic gates Channel-Modulation Effect Harmonic distortion High definition video Mirrors Transistors Harmonic Distortion
Content Type	Text
Resource Type	Article

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