ANALOG DIGITAL CONVERTER

摘要

PURPOSE: An ADC(Analog To Digital Converter) is provided to shorten digital conversion time by performing an analog to digital conversion during a sampling period. CONSTITUTION: A first capacitor array(211) samples an analog input voltage. The first capacitor array includes a plurality of capacitors and a plurality of switches A first comparator(212) is connected to the analog input voltage through a sub ADC coupling circuit(215). The first comparator is connected to the first capacitor array through a main ADC coupling circuit(216). The first comparator transfers a comparison signal of a received signal to a first SAR logic circuit(213). The first SAR logic circuit determines a digital bit by one bit unit by receiving the comparison signal. The sub ADC coupling circuit and the main ADC coupling circuit are composed of a switch, respectively.