EXTENDED COUNTING INCREMENTAL SIGMA DELTA ANALOGUE-TO-DIGITAL CONVERTOR

摘要

An extended counting incremental sigma-delta analog-to-digital converter is provided to improve conversion speed by performing two-step operations of determining MSB(Most Significant Bit) and LSB(Least Significant Bit) independently. A first incremental sigma-delta A/D(analog/Digital) converter outputs an MSB(Most Significant Bit) signal of a digital-converted signal by calculating a first analog input signal from the first analog input signal. A second incremental sigma-delta A/D converter outputs an LSB signal of a digital-converted signal by calculating the first analog input signal by receiving an integration voltage in the first incremental sigma-delta A/D converter.