A High-Resolution Hybrid DPWM Circuit for Digitally Controlled Buck Converter in 0.13μm CMOS Process

摘要

This paper describes a structure of high-resolution hybrid DPWM(Digital Pulses-width Modulator) for digitally controlled Buck converter. In this structure, delay line structure and DLL(Delay-locked Loop) are utilized to realize high resolution of DPWM circuit at high switching frequency(2MHz). The purposes of this circuit are fine time resolution and low power consumption. The proposed digital-analog mixed structure is designed for a Digitally Controlled Buck Converter in 0.13μm CMOS Process.