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0.9‐V CMOS cascode amplifier with body‐driven gain boosting
Author(s) -
Monsurrò Pietro,
Pennisi Salvatore,
Scotti Giuseppe,
Trifiletti Alessandro
Publication year - 2009
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.539
Subject(s) - boosting (machine learning) , operational transconductance amplifier , transconductance , amplifier , cmos , electronic engineering , cascode , common source , power supply rejection ratio , computer science , fully differential amplifier , electrical engineering , operational amplifier , engineering , transistor , voltage , artificial intelligence
Abstract The body‐driven variant of the gain‐boosting technique is here exploited to design a CMOS transconductance amplifier with minimum supply below 1 V. When compared with the conventional gain‐boosting technique, the proposed body‐driven approach reduces the minimum supply requirement by two thresholds in a rail‐to‐rail amplifier exploiting two complementary input stage topologies. Simulations using a 130‐nm process show that a 0.9‐V power supply is adequate for a single‐stage rail‐to‐rail amplifier providing a 56‐dB gain, which is 18 dB higher than that achieved by the same architecture but using the traditional cascoding approach. The main drawbacks are that the solution requires a twin‐tub process and an additional bias section. Copyright © 2008 John Wiley & Sons, Ltd.