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Low-voltage micropower super class AB CMOS OTA

Low-voltage micropower super class AB CMOS OTA

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Novel class AB OTA topologies result from the combined use of local common-mode feedback and class AB input stages. They can operate at low supply voltage and feature very low static power consumption, bandwidth enhancement, and very high slew rate. Measurement results of a 0.5 µm CMOS prototype show slew rate and unity-gain bandwidth enhancement factors of 180 and 4.5, respectively, compared to a conventional one-stage OTA.

Inspec keywords: feedback amplifiers; power amplifiers; integrated circuit design; CMOS analogue integrated circuits; power consumption; network topology; low-power electronics; operational amplifiers

Other keywords: slew rate; bandwidth enhancement; common-mode feedback; operational transconductance amplifier; 0.5 micron; static power consumption; conventional one-stage OTA; novel class AB OTA topologies; CMOS prototype; low-voltage micropower super class AB CMOS OTA; unity-gain

Subjects: Network topology; CMOS integrated circuits; Amplifiers; Analogue circuit design, modelling and testing

References

    1. 1)
      • R. Castello , P. Gray . A high-performance micropower switched-capacitor filter. IEEE J. Solid State Circuits , 1122 - 1132
    2. 2)
    3. 3)
      • Ramírez-Angulo, J.: `The flipped voltage follower: a useful cell for low-voltage low-power circuit design', Proc. ISCAS 2002, Scottsdale, AZ, USA, p. II 615–618.
    4. 4)
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http://iet.metastore.ingenta.com/content/journals/10.1049/el_20040166
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