A Novel Beat-Frequency Time Quantizer With Zero Steady-State Offset For Fully Integrated Digital LDOs

Abstract

A novel beat-frequency (BF) time quantizer with zero steady-state offset is proposed. The digital low-dropout (DLDO) regulator based on this quantizer can eliminate its inherent steady-state output error caused by the previous quantizer, thus improving its output accuracy (OA). At the same time, this quantizer retains the characteristic of adaptive sampling clock. So that it has the advantages of zero steady-state offset, high quantization resolution, fast transient response speed and low power consumption. This paper designs the proposed quantizer based on a 40-nm technology and simulates it at only 1V supply voltage. The simulation results show that its steady-state offset is zero.