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Single Miller capacitor frequency compensation with nulling resistor for three‐stage amplifiers
Author(s) -
Cannizzaro S. O.,
Grasso A. D.,
Palumbo G.,
Pennisi S.
Publication year - 2008
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.464
Subject(s) - capacitor , frequency compensation , resistor , gain–bandwidth product , bandwidth (computing) , amplifier , compensation (psychology) , electrical engineering , electronic engineering , operational amplifier , cmos , engineering , computer science , telecommunications , voltage , psychology , psychoanalysis
Abstract A frequency compensation technique for three‐stage amplifiers is introduced. The proposed solution exploits only one Miller capacitor and a resistor in the compensation network. The straightness of the technique is used to design, using a standard CMOS 0.35‐µm process, a 1.5‐V OTA driving a 150‐pF load capacitor. The dc consumption is about 14µA at DC and a 1.8‐MHz gain–bandwidth product is obtained, providing significant improvement in both (MHzpF)/mA and ((V/µs)pF)/mA performance parameters. Copyright © 2007 John Wiley & Sons, Ltd.