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A 1-V 1-mW high-speed class AB operational amplifier for high-speed low power pipelined A/D converters using 'Slew boost' technique

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5 Author(s)
Aslanzadeh, H.A. ; Sharif Univ. of Technol., Tehran, Iran ; Mehrmanesh, S. ; Vahidfar, M.B. ; Safarian, A.Q.
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An ultra-low-voltage low-power high-speed class-AB operational amplifier with a new structure is presented. A new technique called 'Slew Boost' is introduced to improve amplifier's large-signal settling behavior, most useful in switched-capacitor circuits such as pipelined ADCs, sigma delta modulators, etc. The proposed op-amp has been designed to be employed in the first stage of a 10 bit 150 MSamples/sec pipelined analog-to-digital converter. Simulation results of the proposed fully-differential class-AB op-amp, using 0.18 μm CMOS process models, confirm that it has an output swing of 1.5 Vp-p and consumes less than I mW from a single supply of I volt.

Published in:

Low Power Electronics and Design, 2003. ISLPED '03. Proceedings of the 2003 International Symposium on

Date of Conference:

25-27 Aug. 2003