Single Miller capacitor compensated multistage amplifiers for large capacitive load applications | IEEE Conference Publication | IEEE Xplore

Single Miller capacitor compensated multistage amplifiers for large capacitive load applications


Abstract:

This work presents two compensation techniques for low-voltage three-stage amplifiers driving large capacitive loads: single Miller capacitor compensation (SMC) and singl...Show More

Abstract:

This work presents two compensation techniques for low-voltage three-stage amplifiers driving large capacitive loads: single Miller capacitor compensation (SMC) and single Miller capacitor feedforward compensation (SMFFC). They are implemented in amplifiers fabricated in standard 0.5 /spl mu/m CMOS technology. The use of a single Miller compensation capacitor in three stage amplifiers is explored. The small compensation capacitors used in the proposed topologies enhance the bandwidth and significantly reduce the silicon area. Feedforward paths are properly used to improve the stability of the amplifiers. Experimental results show that the SMC and SMFFC amplifiers achieve gain-bandwidth products of 4.6 MHz and 9 MHz, respectively, when driving a load of 250 /spl Omega//120 pF. Each amplifier operates from a /spl plusmn/1 V supply, dissipates less than 0.42mW of power and occupies less than 0.02 mm/sup 2/ of silicon area.
Date of Conference: 23-26 May 2004
Date Added to IEEE Xplore: 03 September 2004
Print ISBN:0-7803-8251-X
Conference Location: Vancouver, BC, Canada

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