Low Voltage Low Power Op Amp with Gain Boosting and Frequency Compensation Technique for Battery Powered Applications

Abstract

Designing analog circuit to operate at low voltage levels for applications like battery powered analog and mixed mode electronic device is the need of the day. MOS devices are required to be used in the weak inversion region or the sub-threshold inversion region to minimize DC source power. In this paper the design of low voltage low power operational amplifier operating at ±1V with power consumption of 110µW has been implemented in 0.18µm CMOS technology. Simulated results of the amplifier using CADENCE, Spice simulation tool showed a DC gain of around 70dB with GBW of 20MHz, phase margin of 330 .The designed op amp has various advantages over its existing counter-parts like high gain, GBW, phase margin with the only relevant drawback being marginal power dissipation enhancement making it suitable to be used in battery-powered applications.