The design of an ADC on a FPGA used for the control of a switched mode power supply

摘要

The following paper describes the design and implementation of an analog-to-digital converter (ADC) using an FPGA circuit — Artix 7, manufactured by Xilinx inc. The ADC implemented is intended to be part of a digital control circuit for a DC-DC inverter. All blocks of the control circuit will be part of the FPGA circuit. The method described requires two successive conversions, namely voltage-to-time and time-to-digital. Both conversions will be presented in terms of design, physical implementation and experimental results. Various ways to improve the accuracy of the resulting conversion will be discussed.