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Frequency compensation of MOS operational transconductance amplifiers
International Journal of Circuit Theory and Applications, 1991AbstractOperational transconductance amplifiers (OTAs) can be compensated by a capacitor placed in the differential‐to‐single‐ended (D/SE) conversion stage. the concept involved in shaping the magnitude and phase‐frequency response of OTAs is to realize a low‐frequency zero such that the effects of double poles prior to unity gain are not felt.
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Active rc filters using an operational transconductance amplifier and an operational amplifier
International Journal of Circuit Theory and Applications, 1980AbstractAn operational transconductance amplifier (OTA) and an operational amplifier are being used to synthesize various second‐order cascadable active RC filters. Two of them are active R filters. The filters are studied both theoretically and experimentally and are found to have low sensitivity to variations in their component values.
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Operational Transconductance Amplifiers For Gigahertz Applications
2008A novel CMOS operational transconductance amplifier (OTA) is proposed and demonstrated in this thesis. Due to its feedforward-regulated cascode topology, it breaks the previous OTA frequency limit of several hundred MHz and operates at frequencies up to 10 GHz with a large transconductance.
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