A constant bandwidth switched-capacitor programmable-gain amplifier utilizing adaptive miller compensation technique

Abstract

This paper presents a constant bandwidth switched-capacitor programmable-gain amplifier (SC-PGA). By using an adaptive Miller compensation technique for the SC-PGA, our SC-PGA achieves low power consumption and high linearity at various gain conditions. The post-layout simulation results with 0.18 μm CMOS process show that power efficiency is tripled over the SC-PGA without the adaptive Miller compensation technique at 12 V/V gain without degrading performance. Power consumption is 2.8 mW at 3.3 V analog and 1.8 V digital supply voltage.