An operational amplifier (OPAMP) for portable devices with dual supply voltage is presented in this work. The design is realized with a 600mV supply for the core design and a 1.8V supply for the biasing circuit to improve input common mode range (ICMR), gain, and common mode rejection ratio (CMRR). The designed amplifier is implemented with dynamic threshold voltage MOSFET (DTMOS) transistors to decrease power consumption and increase the performance of the design. The power consumption of the core design is obtained as 2μW while the biasing circuitry consumes 7.38μW. The application of different supply voltages has greatly increased the gain of the circuit, where the circuit exhibits 100.2dB DC gain and 3.41MHz gain bandwidth product (GBW). CMRR of the designed circuit is 84.22dB. The simulations are performed in Cadence environment with 0.18μm CMOS technology.

中文翻译：

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采用双电源电压的 DTMOS 技术的运算放大器设计

本文介绍了一种用于具有双电源电压的便携式设备的运算放大器 (OPAMP)。该设计是用 600 实现的用于核心设计的 mV 电源和 1.8用于偏置电路的 V 电源，以改善输入共模范围 (ICMR)、增益和共模抑制比 (CMRR)。所设计的放大器采用动态阈值电压 MOSFET (DTMOS) 晶体管实现，以降低功耗并提高设计性能。核心设计的功耗为 2μW 而偏置电路消耗 7.38μW. 不同电源电压的应用大大提高了电路的增益，电路表现出100.2dB DC 增益和 3.41MHz 增益带宽积 (GBW)。设计电路的CMRR为84.22D b。仿真在 Cadence 环境中进行，0.18μ米CMOS技术。