An approach to essentially improve current efficiency for bulk-driven OTA

作者：Zhao, Xiao; Zhang, Qisheng^*; Wang, Yongqing; Dong, Liyuan

来源：AEU-International Journal of Electronics and Communications, 2018, 86: 103-107.

DOI：10.1016/j.aeue.2018.01.028

• Current efficiency
• Slew rate enhancement
• Transconductance improvement
• Bulk-driven
• OTA

An approach to essentially improve the current efficiency for the bulk-driven circuits is presented. By employing an auxiliary amplifier cross-coupled to the gate of bulk-driven flipped voltage follower and input differential pairs, it achieves not only the gain-bandwidth improved, but also the slew rate significantly enhanced, which leads to a great boost in current efficiency. To validate our introduced method, the conventional and the proposed bulk-driven amplifiers are both designed under the CSMC 0.181 mu m technology. Simulation results demonstrate that bulk-driven amplifier based on the proposed method achieves an 8 times slew rate and a 4 times bandwidth improvement with only a negligible increase in power consumption.

• 出版日期2018
• 单位中国地质大学（北京）