Design of a Low Power Class AB Two-Stage Op-Amp with Symmetrical Slew Rate
نویسنده
چکیده
The operational amplifier is perhaps the most useful integrated device in existence today. It is widely used in analogue computers, simulation systems and in a variety of electronic applications such as filtering, buffering and comparison of signal levels. In this paper, the different schemes of power-efficient class AB two-stage op-amps using a current replication branch and adaptive loads were analysed. A CMOS class AB two-stage op-amp is proposed by modifying the existing power efficient class AB two-stage op-amps for low-power, optimum gain and symmetrical slew rate operation. In the proposed class AB two-stage op-amp power is significantly reduced. The circuits presented in this work are designed in 130nm technology by using mentor graphics backend tools with a supply voltage of 3.3V. Proposed class AB two-stage op-amp is compared with existing power efficient class AB two-stage op-amps and the results are discussed in detail.
منابع مشابه
A New Low-Voltage, Low-Power and High-Slew Rate CMOS Unity-Gain Buffer
Class-AB circuits, which are able to deal with currents several orders of magnitude larger than their quiescent current, are good candidates for low-power and high slew-rate analog design. This paper presents a novel topology of a class AB flipped voltage follower (FVF) that has better slew rate and the same power consumption as the conventional class-AB FVF buffer previously presented in liter...
متن کاملDesign a Low Voltage- Low Offset Class AB Op-Amp
A new design approach for three-stage operational amplifiers (op-amps) is proposed. It allows to actually implement a symmetrical push-pull class-AB amplifier output stage for wellestablished three-stage amplifiers using a feedforward transconductance stage. Compared with the conventional design practice, the proposed approach leads to a significant improvement of the symmetry between the posit...
متن کاملA new class AB differential input stage for implementation of low-voltage high slew rate op amps and linear transconductors
A new class AB differential stage that operates with a single supply voltage of less than two transistor threshold voltages is introduced. This circuit has utilization in high slew rate one stage op-amps, two stage op-amps with class AB input and output stages and linear transconductors. The circuit was verified with simulations and experimentally. It it is shown to have lower voltage supply re...
متن کاملDesign High Speed, Low Noise, Low Power Two Stage Cmos Operational Amplifier
The objective of this paper is to design a Low-Voltage, Low-Power and High-Gain Operational Amplifier used for high speed compensated CMOS op-amp which specifies open loop circuit parameters to obtain enhanced gain, settling time and closed loop stability An Op-Amp is designed in a 0.18 μm standard digital CMOS Technology The low noise high speed Op-Amp is designed using 180nm CMOS technology a...
متن کاملLow-Area/Low-Power CMOS Op-Amps Design Based on Total Optimality Index Using Reinforcement Learning Approach
This paper presents the application of reinforcement learning in automatic analog IC design. In this work, the Multi-Objective approach by Learning Automata is evaluated for accommodating required functionalities and performance specifications considering optimal minimizing of MOSFETs area and power consumption for two famous CMOS op-amps. The results show the ability of the proposed method to ...
متن کامل