ADC architecture with direct binary output for digital controllers of high-frequency SMPS

Abstract

Without adopting encoder to convert "thermometer code" into binary code, analog-to-digital converter (ADC) architecture with direct binary code output is proposed for digital controllers of high-frequency switching mode power supply (SMPS). It can provide large conversion ranges with required precision and reduce ADC circuit complexity. The output can be compressed into a much shorter addressing character in logarithmic law and lead to reduction of memory size in the look-up table of the digital compensator