Digital 1 V 82 μW Pseudo-Two-Stage Class-AB OTA  

作　　者：殷树娟 孙义和 李翔宇 

机构地区：[1]Tsinghua National Laboratory of Information and Technology,Institute of Microelectronics,Tsinghua University

出　　处：《Tsinghua Science and Technology》2009年第5期601-605,共5页清华大学学报（自然科学版（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.60236020);the Specialized Research Fund for the Doctoral Program of Higher Education (No.20050003083)

摘　　要：A low power digital operational transconductance amplifier （OTA） was developed for low voltage switched capacitor applications. The OTA has a high slew rate （SR） and a large open loop gain with a dif- ferential pseudo-two-stage Class-AB structure. A fully compensated depletion mode capacitor is used in the switched capacitor common mode feedback block instead of a metal-insulator-metal （MIM） capacitor to reduce the fabrication cost. Simulations show that with a 1.0-V supply voltage and a 34-pF load at each output terminal, this digital differential pseudo-two-stage Class-AB OTA realized in 0.13-μm technology achieves a 63.5-dB DC gain and a 0.83-V output swing. The slew rate is ±16.29V/μs and the total power dissipation is only 82 μW.A low power digital operational transconductance amplifier （OTA） was developed for low voltage switched capacitor applications. The OTA has a high slew rate （SR） and a large open loop gain with a dif- ferential pseudo-two-stage Class-AB structure. A fully compensated depletion mode capacitor is used in the switched capacitor common mode feedback block instead of a metal-insulator-metal （MIM） capacitor to reduce the fabrication cost. Simulations show that with a 1.0-V supply voltage and a 34-pF load at each output terminal, this digital differential pseudo-two-stage Class-AB OTA realized in 0.13-μm technology achieves a 63.5-dB DC gain and a 0.83-V output swing. The slew rate is ±16.29V/μs and the total power dissipation is only 82 μW.

关 键 词：low voltage low power operational transconductance amplifier （OTA） fully compensated depletion mode MOS-capacitor CLASS-AB 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]