کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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542392 | 871548 | 2006 | 12 صفحه PDF | دانلود رایگان |
In this paper, feed-forward techniques are revised and used for the design of high-frequency operational transconductance amplifiers (OTA). For the same power consumption and similar transistor dimensions, the two- and three-path folded-cascode OTA's present both smaller settling error and faster response as compared to the typical folded-cascode topology.Also, a no-capacitor feed-forward (NCFF) compensation which uses a high-frequency pole–zero doublet to obtain high gain, high GBW and a good phase margin is discussed. The settling-time of the NCFF topology can be faster than that of OTA's with Miller compensation, even if the latter topology uses larger transconductance values. Experimental results for the multi-trajectory OTA's fabricated in the AMI 0.5 μm CMOS process demonstrate the feasibility of the feed-forward schemes.
Journal: Microelectronics Journal - Volume 37, Issue 9, September 2006, Pages 1018–1029