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Author: search.filters.author.Chaloenlarp, W.Subject: search.filters.subject.Class-AB

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    Low-voltage Gm-enhanced class-AB pseudo-differential OTA for switched-capacitor circuits
    (2004-12-01)
    Chaloenlarp, W.
    ;
    Thanachayanont, A.
    A new low-voltage, rail-to-rail output swing, class-AB pseudo-differential operational transconductance amplifier (OTA) for high-speed switched-capacitor applications is proposed. Positive feedback is employed to enhance the input transconductance, which increases the open-loop DC gain and the unity-gain frequency of the OTA. Using a 0.35-μm CMOS process, the proposed OTA can obtain 78-dB DC gain, 72.5° phase margin, 100-V/μs slew rate with 1-pF load capacitor, while draining 170-μA quiescent supply current from a single 1- V power supply voltage. © 2004IEEE.