Three-Stage CMOS OTA for Large Capacitive Loads With Efficient Frequency Compensation Scheme |
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| Authors: | Grasso A.D. Palumbo G. Pennisi S. |
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| Affiliation: | DIEES, University of Catania, Barcelona; |
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| Abstract: | A simple compensation strategy, which employs passive components only, is adopted to design a three-stage operational transconductance amplifier (OTA) suitable for driving high capacitive loads. Compared to the classical nested Miller compensation technique, the new solution exploits two additional resistors and allows a reduction in the values of the compensation capacitors of about an order of magnitude. The OTA was fabricated using 0.35-mum CMOS technology and exhibits a 1.4-MHz gain-bandwidth with a load of 500 pF |
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