Ultra-Low-Power Class-AB Bulk-Driven OTA with Enhanced Transconductance

DOI Web Site 被引用文献2件 参考文献7件
  • CHOE Seong Jin
    School of Electronics Engineering, Kyungpook National University
  • LEE Ju Sang
    School of Electronics Engineering, Kyungpook National University
  • PARK Sung Sik
    School of Electronics Engineering, Kyungpook National University
  • YU Sang Dae
    School of Electronics Engineering, Kyungpook National University

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<p>This paper presents an ultra-low-power class-AB bulk-driven operational transconductance amplifier operating in the subthreshold region. Employing the partial positive feedback in current mirrors, the effective transconductance and output voltage swing are enhanced considerably without additional power consumption and layout area. Both traditional and proposed OTAs are designed and simulated for a 180 nm CMOS process. They dissipate an ultra low power of 192 nW. The proposed OTA features not only a DC gain enhancement of 14 dB but also a slew rate improvement of 200%. In addition, the improved gain leads to a 5.3 times wider unity-gain bandwidth than that of the traditional OTA.</p>

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